What Is a Lightweight Refractory Castable

Lightweight refractory castables are made of powder and refractory aggregate, admixture and binder. General provisions: the volume density is less than 1800kg/m, did not make requirements for the refractoriness, or the total porosity is more than 45%, in the specified temperature of the shrinkage rate is less than 1.5% of the castable, called light refractory castable.

Lightweight refractory castable has the following characteristics: small volume density, low thermal conductivity, so it has a good heat insulation performance. There are many varieties of light refractory castables, which are generally classified according to light aggregate varieties, binder types, production methods and performance grades. The most commonly used varieties of light aggregate are light refractory castable such as light sand brick, porous clinker, hollow ball, ceramsite and expanded perlite.

Saving energy is one of the most concerned topics in the world at present. In this general trend, light refractory castable can be developed rapidly, varieties expanded, output increased, quality improved, widely used. In the past, in kilns with temperatures over 1000°C, lightweight refractory castable can only be used as insulation layer, and it is difficult to contact the flame directly. At present, light refractory castables used in flame kilns below 1800°C can be normally produced, and some can be used as working linings.

In the petrochemical industry, metallurgy, electric power and building materials and other industrial sectors, such as furnace and thermal equipment, light refractory castable is widely used, generally used as heat insulation layer, can also be used as its working layer or load-bearing components, have obtained good results and evaluation. In contact with liquid metal or slag, only tundish is covered with insulation board, and good results have been achieved. The performance test of light refractory castable is basically the same as that of heavy refractory castable. One of the differences is that the test of softening temperature under load is 0.1MPa under added load.

It should be pointed out here that with the demand of energy saving of industrial kilns, lightweight refractory castable is sure to get a greater development prospect, its direction is high strength, light weight, low thermal conductivity, low price and easy to use. In addition, light aggregate and binder are generally used in combination, and admixture can develop excellent lightweight refractory castable.

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What Are Castables Commonly Used in Heating Furnaces

For the refractory good material is widely used is castable and as the application of the occasion of different appliances will also have a different kind of material to choose, and usually heating furnace commonly used refractory castable what.

Refractory castable refers to the mixture composed of refractory aggregate, binder and admixture, which is mixed with water and can be constructed by pouring method. Different from other amorphous refractory, refractory castable has certain setting and hardening time after construction.

If the use of low cement castable is suitable for heating furnace of high temperature, temperate zone and has a moderate solidification rate, good thermal shock resistance, high softening temperature under load, slag resistance, high refractoriness. Mullite castable material can be used in the heating furnace wall, roof and pressing beam and other key parts or used to prefabricate burner bricks.

And the self-leveling castable can be applied to the heating furnace structure is more complex or artificial can not vibrate the position characteristics are the same as the low cement castable.For phosphate castable, it is applied to some parts that are subjected to severe friction and hot air scour to ensure good internal corrosion resistance and a small amount of fiber can be added to increase its toughness. 

Refractory castable is a granular powder material made of refractory material, consisting of a certain amount of binder and water. It has high fluidity and is suitable for casting construction and can be used to harden amorphous refractories without heating. An amorphous refractory castable formed by casting in comparison with other amorphous refractory castables.

Refractory castable uses high binder and moisture content, good fluidity. Therefore, amorphous refractory castable has a wider range of applications, according to the application conditions can be selected raw materials and adhesives. It can be cast directly into a lining, or it can be poured or shaken into prefabricated blocks.

When the castable is mixed with the forced mixer, it is necessary to pay attention to these aspects during the construction. Mixing time and liquid participation should be completed according to the construction instructions. When changing different materials, mixers, hoppers and weighing containers should be cleaned.

Above is the type of pouring material commonly used in heating furnace introduction hope that we can consider in advance and consult manufacturers in time in case of the use of the choose and choose problem.

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Description of Lightweight Insulating Castable

Introduction to the use of lightweight thermal insulation castables

1. Lightweight insulating castable is suitable for mechanical spraying, pouring or smearing.

2. The light weight casting production has been accurately measured according to the ratio. Considering the timeliness of the bonding agent, the light-weight material and the bonding agent are packaged separately. The light-weight material is packaged in a plastic bag inside the woven bag. The bonding agent is the original packaging. Five bags of light weight materials plus one bag of binder are the smallest batching unit.

3. Transportation and storage

(1) Transportation should depend on the distance between the factory and the construction site. For shorter production (allowable within 500km), you can choose to transport by car, and you can choose to ship by train for longer distances.

(2) Lightweight castables should be placed in a dry and well-ventilated place to avoid direct sunlight or excessively high temperature.

4. The best product validity period is four months.

5. Equipment

(1) Forced mixer (in the case of small usage and limited conditions, manual mixing may be considered).

(2) With complete common sporadic tools (straight ruler, plastering knife, spatula, trolley, bucket), etc.

(3) Use clean domestic water to ensure the normal solidification of the castable (PH value 6.5-7)

(4) Take timely measures to prevent rain and water.

(5) The construction site should have complete safety measures.

6. Mixing

(1) The temperature at the construction site is best at +5-+30°C. If the temperature is too high, cooling measures should be taken, and good insulation measures should be taken during winter construction.

(2) Clean mixing equipment and other tools, and prepare quantitative clean water in strict accordance with the requirements. The water temperature in winter is preferably 15-20°C. The mixer should be placed near water and electricity.

(3) Determine the amount of one-time stirring according to the actual dosage. Pour the mixed light materials first, and then add the binder, dry mix in advance for 2-3 minutes, so that the light materials and the binder are uniformly mixed, and the appearance is basically the same. Then add about 80% of the total water consumption, and finally add water according to the dry and wet procedures of the slurry. Continue to stir for 3-5 minutes. Under the conditions of construction and workability, strictly control the amount of water added, generally 40- 50%, the whole stirring time is controlled within 5-8 minutes. The use time of each well-mixed material should not exceed 30 minutes, and the amount of water should be adjusted according to the construction site and construction method.

7. Construction

When pouring during construction, the thickness of more than 100mm can be formed by manual tamping, and it can be compacted with a wooden stick. The formwork of the supporting template can also be used for construction. It can also be vibrated with a small vibrating rod, but the vibration time should not be too long to avoid Lightweight pellets float up and cause uneven density. When the thickness is thin, it can be applied directly by hand, and the moisture is reduced accordingly to prevent collapse or the generation of holes.

8. Demoulding

Usually, the mold can be demolded after 12 hours after construction (24 hours in winter). The mold must be knocked gently during demolding to prevent brutal demolding and damage to the casting material and the mold. Due to the high moisture content of the lightweight thermal insulation castables, the construction of the wear-resistant refractory layer should be carried out after more than 2 days of natural maintenance (pay attention to ventilation and moisture removal).

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How To Select Castables When Purchasing

Castables are currently the most widely used amorphous refractory materials in the refractory industry. There are many different products on the market. How do we judge their quality? Let me introduce to you the issues that you should pay attention to in the selection of castables: users using unshaped refractory materials, such as castables, plastics, etc., must first check their useful life. After unpacking the product, be sure to carefully check the factory date on the package. For products that exceed the prescribed period, the performance of the castable will decline.

The particle size, strength and composition of refractory castables have a very important influence on the quality of masonry. Check the particle size and shape, generally by visual method. For example, the size of the knotted induction furnace is preferably diamond-shaped and has sharp corners. The particle size strength can be determined by tapping with a wooden hammer and looking at the crushing situation. Check the size and composition of the particle size and use the screening method. The sieving method is carried out in the laboratory, and it can measure the composition of various particle sizes.

After confirming the raw materials used, this series of castables will go through a series of manufacturing processes to produce suitable castables, and then be cured according to appropriate methods. Finally, the structures will be put into use after proper baking. Because the construction process of the castable is also very important, extra attention should be paid to the amount of water added during the construction of the castable. The castables should contain a certain amount of water, and the specific amount of water added should be analyzed according to the actual situation. For example, calcium aluminate cement can be pre-mixed with a binder to make an aqueous solution and added to it. For those who need to hydrolyze in advance, this method is better.

The hardening speed of cement in refractory castables is closely related to the amount of water added. The most appropriate water-cement ratio should be selected at the peak of the water-cement ratio curve. Not only the type of cement, but also the shape and nature of the particles. During construction, in order to ensure the strength of the castable, the general water-cement ratio is controlled at about 0.4 to 0.6, and the moisture in the mixture is about 5% to 6%.

Of course, it is more important to choose high-quality castables according to the user's specific use. Rongsheng Kiln specializes in producing all kinds of high-temperature, wear-resistant casting materials, plastics, refractory bricks, etc., with preferential prices, independent production, and provides construction services, quality can be used with confidence. You are welcome to visit the company, our company has nearly two decades of technical experience and will recommend suitable products for you according to your needs!

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High Strength Akali Resistant Castable Supply

High strength alkali resistant castable adopts low cement combined technology, adding ultrafine powder and high efficiency dispersant, high strength, good thermal stability, impact resistance, erosion resistance, wear resistance, long service life. Excellent material selection, castable refractory up to 1790℃, high temperature performance. Machine mixing, pouring construction, spraying can be machine semi - dry spraying construction is convenient, greatly shorten the construction period, significant economic benefits.

High strength alkali resistant castable needs to be mixed with water into mortar vibration casting, or the production of various types of precast blocks, spraying type can be semi-dry spraying construction. It is widely used in cement kiln preheater lining, pipe lining, cooling machine lining, coal spray gun dressing, front and back kiln, cooling machine and other high-temperature parts. Can be prefabricated into various specifications of the precast blocks, or spraying construction (preheater lining).

Because the flue gas velocity of circulating fluidized bed boiler is high, the erosion of coal ash particles and the erosion of flue gas are serious, the use environment of the lining wear resistant refractory is bad, the operation practice has proved that the traditional refractory has not adapted to the operation needs of circulating fluidized bed boiler. The series of alkali resistant castable material has high density, high strength wear resistance; Higher thermal strength; Excellent resistance to erosion; Good volume stability and erosion resistance at high temperature.

Our production of alkali resistant castable is the use of high silicon and low aluminum good alkali resistant ceramic particles as aggregate and powder, with aluminate cement and admixture prepared alkali resistant castable. When alkali erosion occurs in the process of use, high silicon and low aluminum components react with alkali gas to form high viscosity liquid phase, which is attached to the surface of castable to form enamel-like protective layer, thus preventing alkali erosion and eliminating "alkali crack" phenomenon.

Alkali resistant castables must be kept in dry warehouses. The effective storage period is 12 months for barrels and 4 months for bags. During loading and transportation, there must be protective measures against rain, snow and humidity.

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High Strength Wear Resistant Castable Supply

High strength wear resistant castable is mainly corundum or high quality alumina clinker, silicon carbide as aggregate. And introduce a variety of micro powder, superfine powder, corundum powder and additives as admixtures prepared. Mainly used for circulating fluidized bed boiler air plate, slag discharge tube, furnace chamber dense phase area and furnace outlet, cyclone separator, inlet and outlet flue, return device, slag cooler and other structures are complex, can be cast and vibration less parts.

The important indexes of macrostructure of the series wear resistant castable are porosity, water absorption, permeability, pore diameter distribution, volume density, true density, etc. These are important indexes to evaluate the quality of refractories. In addition to the direct expression of their own significance, these indicators can also be closely related to other properties of high strength wear resistant castable, such as thermal shock resistance, slag resistance, mechanical properties, thermal conductivity and so on.

The formation of wear resistant castable is closely related to the raw material and manufacturing process, including the type, ratio, particle size, mixing, molding, drying and firing conditions of the raw material. Because the macroscopic structure of the refractory castable not only reflects the process of the high strength wear resistant castable, but also affects its many important properties, the study of the macroscopic structure of the refractory castable has an important guiding role for improving the process and performance.

Its main characteristics are high strength, erosion resistance, good thermal shock stability and so on, the operating temperature of 900℃ or so. It also has the advantages of small wear loss, high strength, controllable shape, strong integrity, simple construction and good construction performance. Due to the addition of high molecular polymer, the concrete base has a strong bond, which is used in many fields.

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Refractory Cement Manufacturing

Refractory cement is a hydraulic cementation material made of alumina and bauxite, calcined clinker with calcium aluminate as the main component and alumina content of about 50%. Aluminate cement is often yellow or brown, but also gray. The main mineral of aluminate cement is monocalcium aluminate (CaO·Al2O3, CA) and other aluminate, as well as a small amount of dicalcium silicate (2CaO·SiO2). The colors are mostly gray and white.

Characteristics Of Refractory Cement Products

1. Refractory cement sets and hardens quickly. 1d strength can reach more than 80% of the highest strength. It is mainly used for construction emergencies, such as national defense, roads and special emergency repair projects.

2. This series of cement hydration heat, and heat release concentration. The heat of hydration released within 1d is 70% ~ 80% of the total amount, which makes the internal temperature of concrete rise higher. Even under -10℃ construction, aluminate cement can set and harden quickly, which can be used for winter construction.

3. It has strong resistance to sulfate corrosion under common hardening conditions, because the cement stone does not contain calcium aluminate and calcium hydroxide, and the density is large.

4. High heat resistance. If the use of refractory coarse aggregate (such as chromite, etc.) can be made of heat resistant concrete using temperature up to 1300 ~ 1400℃.

Refractory Cement is Suitable For

1. Used for preparing unshaped refractory materials;

2. With refractory coarse and fine aggregate (such as chromite, etc.) can be made into heat resistant concrete with high temperature;

3. Emergency works for construction period;

4. For sulphate corrosion resistance works and winter works.

Refractory cement refers to cement with a fire resistance of not less than 1580°C. Refractory cement takes bauxite and limestone as raw materials, calcined with calcium aluminate as the main component, alumina content of about 50% clinker, reground into hydraulic cementation material. According to the composition of different, can be divided into aluminate refractory cement, low calcium aluminate refractory cement, calcium magnesium aluminate cement and dolomite refractory cement. Refractory cement can be used to cement various refractory aggregates (such as corundum, calcined high bauxite, etc.), make refractory mortar or concrete, used for lining cement rotary kilns and other industrial kilns.

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High Alumina Brick Production Technology

Production technology of high alumina refractory brick and clinker clay bricks are similar, the difference is that the ingredients in the clinker ratio is higher, can be as high as 90 ~ 95%, before breaking the clinker grading sorting and screening in addition to iron, firing temperature is higher, such as Ⅰ, Ⅱ high alumina brick with tunnel kiln firing when the general is 1500 ~ 1600 ℃.

According to different resource conditions and product requirements, the following types of raw materials can be used: high-alumina bauxite consisting mainly of water-bearing aluminum-oxygen minerals (monohydrate, sanshui bauxite, etc.); Silicalite group minerals (including blue SPAR, andalusite, silicalite, etc.); Artificial synthetic raw materials, such as industrial alumina, synthetic mullite, fused alumina and so on. China's high aluminum-vanadium soil is rich in resources, good quality, the origin is mainly distributed in Shanxi, Henan, Hebei, Guizhou, Shandong and other places. The high aluminium-vanadium soil produced is mainly a mixture of two minerals, monohydrate (-Al2O3·H2O) and kaolinite.

The fireproof degree of high alumina brick is higher than that of clay brick and semisilicite brick, up to 1750~1790℃, which belongs to senior refractory material. Because Al2O3 is high in high aluminum products, less hybrid mass and less vitreous, the softening temperature of load is higher than that of clay bricks. However, the softening temperature of load is still lower than that of silicon bricks due to the lack of mesh structure formed by mullite crystallization. Al2O3 is more in this series of refractory bricks, which is close to neutral refractory material and can resist the corrosion of acid slag and alkaline slag. Due to the SiO2 contained in the refractory bricks, the ability of alkali slag is weaker than acid slag.

High alumina refractory brick is mainly used for lining of blast furnace, hot air furnace, electric furnace top, blast furnace, reverberatory furnace and rotary kiln. In addition, high alumina brick is widely used as open hearth grate brick, plug head used in pouring system and water mouth brick. However, the price of high-alumina brick is higher than that of clay brick, so it is unnecessary to use high-alumina firebrick where the clay brick can meet the requirements.

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High Aluminium Castable Main Composition

What are the main ingredients of high aluminium castable? High alumina castable is made of high alumina, kaolin or alumina powder and other refractory raw materials for refractory aggregate, in accordance with the proportion of the formula to add refractory powder, additives and binder, after mixing and stirring the production of mixed powder particles, high alumina refractory castable is produced by many production processes and unshaped refractory materials. Generally speaking, the main composition of high alumina refractory castable can be determined according to the choice of refractory aggregate.

The composition of high alumina refractory castable is divided into principal and subsidiary components, and the basic components that account for more and determine the high temperature performance of refractory castable are called the main components, and the components added in the production process of refractory raw material and the accompanying inclusions are called the secondary components. The main composition of high aluminum castable is chemical composition, plays a leading role in high aluminum castable, in the proportion of refractory castable composition is also very large, has an important decision on the high temperature performance of refractory castable.

Refractory castable has a lot of kinds, some are named after the main component, some are named after the performance, and high alumina refractory castable is named after the main component, high alumina castable in 2 aluminum composition is higher, so high alumina castable main component is 3 aluminum 2 aluminum. But the specific proportion of alumina in high alumina castable still needs to be tested to get the accurate value. General high aluminum refractory castable main component detection is to add reagent, and then through the equipment to detect the high and low of the main components and secondary components in high aluminum refractory castable and its content.

The main composition of high alumina castable is the basic test of the castable cooking index items. In the composition analysis of high alumina refractory castable, the main composition is the main body of high alumina refractory castable, and it is the basic condition that directly determines the high alumina castable's high temperature refractory performance.

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Silica Brick For Glass Kiln

Silicon brick is the most commonly used refractory for glass furnace in the structure of glass tank furnace. The industrial application of silicon brick was more than two thousand years later. In 1822, the first industrial silicon brick, and used in the iron and steel industry coking furnace. After the First World War, the iron and steel industry developed greatly, because of the need of large coking furnace, the production of silicon brick developed rapidly. The invention of high density silicon bricks in 1944 greatly improved the quality of silicon bricks. At present, silicon brick is developing towards high purity, low porosity and no untransformed quartz crystal. Since the highest melting point of Si02 crystal is 1725℃, the refractory of silicon brick cannot exceed this temperature. With the increase of melting temperature, the silicon brick is likely to be replaced by electrofused cast refractory material with higher refractoryand better corrosion resistance. However, silicon brick is still a very good refractory material when used in pool furnaces with melting temperature of no more than 1630~G.

The main advantages of silicon brick are

1. High softening temperature under load. The softening temperature of high quality silicon brick under load can reach 1705℃, and that of general silicon brick can reach 1630℃.

2. Good shock resistance in high temperature. The volume of the silicon brick will hardly change above 700℃, so the temperature fluctuation above 700℃ will not cause damage to the silicon brick.

3. The components are easy to melt and diffuse in the glass, and have little pollution to the glass liquid. The main component of silicon brick is SiO2, which is the main component in general glass. Therefore, the eroded material of silicon brick is easy to melt and diffuse in the liquid glass, thus the formation of stones and stripes is less than that of other bricks.

4. Low price and easy to manufacture.

The glass kiln brick should be stored in a waterproof warehouse. It can still be used after being wet by water and slowly dried at a temperature below 100℃. The strength of water-bearing silicon brick is affected after freezing, and it needs to be checked again after drying. Expansion joints shall be set aside according to the expansion rate provided by the manufacturer. Oven or periodic use of temperature for a time curve should be reasonable, to be specific before 600℃ expansion intense to be strictly controlled. The quality of the mud used in bricklaying should be appropriate to the bricks. Sometimes brick damage is due to the most erosion of the brick joints leading to alkali vapor injection.

In order to improve the melting temperature and extend the whole life of the furnace, some glass factories have changed the furnace mouth and parapet into fused cast brick, and some have changed the arch or part of it into other materials. The consumption ratio of silicon brick may be small, but the silicon bricks has the advantages of high softening temperature under load, light weight and low price. The glass kiln arch and part of the furnace superstructure will still use silicon bricks. Therefore, it is still important to improve the quality of silica bricks in glass kiln. We are the high quality silicon brick manufacturer, the quality is stable reliable, the price is reasonable, has reached the friendly cooperation relations with the domestic and foreign numerous customers, welcome everybody to come to consult to purchase, we will wholeheartedly serve for you.

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Steel Fiber Castable Manufacturing

Steel fiber castable is made of super grade bauxite clinker as aggregate, high quality bauxite clinker and corundum fine powder as matrix, superfine powder and other composite materials as binder and additive, plus stainless steel heat-resistant fiber. 

The refractory product besides with the conventional high temperature wear resistance performance, because in its ingredients added a certain quantity of heat resistant stainless steel fiber, prevent the material in the aggregate and matrix under high temperature condition of rose is poor, and the rev. Stop at the exit of furnace temperature gradient changes of stress caused by the furnace wall damage, at the same time, because of the addition of steel fiber, make the material after pouring furnace wall greatly enhance the overall strength, in CFB boiler, often used in furnace exit and side walls, coping straight segment, cyclone separator and cyclone separator, return feeder and other parts.

The export of steel fiber reinforced castable in boiler and furnace used in areas such as, top, side wall, in the iron and steel, metallurgy, chemical industry and building materials are widely used, refractory castable also called amorphous refractory castable, its usage is almost the same with the use of concrete, formula and the raw material can choose] chosen after a uniform mixing processing, using a vibrator is close-grained after curing and heat treatment, and because of the particularity of amorphous castable used parts, so according to the different site conditions, the castable also needs to have guaranteed the quality of construction.

Refractory castable in the use process should pay attention to the following four key links, namely mixing, pouring, curing and baking. Any of these links have problems, may lead to product performance degradation or use failure.

We are production steel fiber castable has the characteristics of high strength, good toughness, good thermal shock stability, anti-spalling and strong wear resistance. Widely used in cement rotary kiln mouth, cooling machine, coal injection pipe, calciner, preheater and other parts. Steel fiber castable manufacturers direct sale, provide the product specific weight, thermal conductivity, physical and chemical indicators, steel fiber castable price information, free samples, welcome to consult.

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Alumina Bubble Bricks For Sale

Alumina bubble bricks is made of industrial oxidation raw material, blown by electric melting at high pressure, combined with -alumina ultrafine powder, high purity AL2O3, and sintered at 1800℃. The refractory product has the advantages of small volume density, small heat capacity, anti-spalling and so on. It is widely used in lining of high-temperature furnace and auvin energy-saving material.

Alumina bubble brick is alumina hollow ball and aluminum oxide powder as the main raw materials, combined with other binder, after 1750 degrees of high temperature fired. Belongs to ultra high temperature material energy - saving heat preservation material. This series of firebrick has obvious thermal insulation characteristics, low thermal conductivity, can play a very good thermal insulation effect, reduce heat emission, improve thermal efficiency, so as to save energy. The energy saving effect can reach more than 30%.

This series of refractory bricks can also be used for high temperature and energy saving flame kiln, shuttle kiln, molybdenum wire furnace, tungsten bar furnace, induction furnace, nitriding furnace and so on. For reducing the weight of furnace body, reforming structure, saving material and energy, obvious effect will be obtained.

It mainly takes alumina bubble as the main body, and can be made into various shaped products. The use temperature is 1800℃. The products have high mechanical strength, several times that of the general light products, and the volume density is only half that of corundum products. It has been widely used in high temperature and ultra-high temperature furnaces such as gasifier for petrochemical industry, carbon black industrial reaction furnace and induction furnace for metallurgical industry.

Zhengzhou Rongsheng Kiln Refractory Co.,Ltd. is professional refractory material manufacturer, over the years we have been committed to the production of high quality refractory products, to many customers reached a friendly long-term relations of cooperation, stable and reliable quality is guaranteed, welcome to consult the procurement.

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How to solve the shedding of refractory castable

The shedding of refractory castable is a common problem in the construction, which is generally due to the failure to follow the standard operating procedures. Not in accordance with the correct method, process to the construction, then it is very easy to cause damage to the furnace, especially some of the more difficult to construct parts, because of the special situation, in the spraying work is easy to spray uneven, in this case, it is very easy to appear the phenomenon of casting off. It is also because before the construction of refractory castable, the anchoring parts used for fixing are not securely installed, which leads to a large number of anchoring parts falling off from the root during the operation of the boiler, causing the castable to fall off.

Is there an effective solution to the shedding of refractory castable? The answer, of course, is yes. Please listen to the refractory manufacturers for the answer. In the construction, if there is a part of the casting off, do not panic, we can make a solution according to the size of the shedding area. If the shedding area is not large, then we can use tamping material or plastic repair can be. However, if it is a large area of shedding, the shedding part should be knocked first, so that all loose around the refractory castable knocked off, and then re-sprayed.

This is the solution that has been shed, let's talk about how to prevent shedding of pouring.

Anchoring is important because it holds the castable firmly to the surface of the furnace wall. In the selection of anchoring parts, should try to choose the same type of steel and furnace equipment, so as to avoid different expansion and cracking. During welding, Y type anchoring pieces can be replaced by L type for welding, which also improves the fixation adhesion of the anchoring pieces themselves. Suitable refractory castable, such as corundum castable with good thermal shock resistance, should be selected in advance for the parts with severe wear. Because of the long service life of this castable, and thermal shock resistance can fully meet the needs of the use. But one point, no matter what kind of material is chosen, we must pay attention to the construction conditions on the site, otherwise even the most excellent refractory, without a suitable construction environment, the performance will be greatly compromised, unable to achieve the desired satisfactory results. All kinds of furnace finally whether normal operation, all depends on the last process - oven. This is the key step, the need in the construction of strict control of the oven time and temperature control, in order to ensure that the refractory castable can play the best effect.

Zhengzhou Rongsheng Kiln Refractory Co.,Ltd. is specializing in the production of various refractory products manufacturers, product quality is stable and reliable, export more than 60 countries and regions, worthy of customer trust. We are committed to the production of high quality refractory materials, welcome to consult the procurement.

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