Refractories used in reheating furnace

Heat treatment temperature of the reheating furnace is not high, generally its service temperature is lower than 1300℃.When you need any refactory products ,such as fire brick for sale , refractory nozzle ,refractory raw materials. Welcome to view our website anytime.

For reheating furnace lining, usually we use Al-Si refractory materials which contains alumina 36-75%.

The reheating furnace is used for bloom, continuous casting, small steel ingot to meet the temperature needed for hot rolling of thermal equipment. Reheating furnace mainly includes pushing-steel reheat furnace, walking beam furnace and so on.?

Walking beam furnace is one type of continuous heating furnace. Its main characteristic is use walking beam hearth (walking beam) to drive furnace charge in the furnace run forward, instead of pushing machine after the furnace charge by running forward.

Each part of reheating furnace temperature usually remains nearly constant, which can be divided into low temperature zone, medium temperature zone and high temperature zone, its temperature is 800 ~ 900 ℃, 900 ~ 1200 ℃, and 1200 ~ 1300℃.

1. Plastic refractory(Al2O340%~45%) is used for charging side, exit side, pre-heat period, soaking period and heating period of top, etc. Plastic refractory(Al2O370%) is used for burner parts.

2. Mullite anchor brick (Al2O360% & Al2O380%) is used for pre-heat period, soaking period, heating period of top and other fields.

3. Clay anchor brick is used for loading side barrier, headwall, flue, etc.

4. Heat insulation castable is used for pre-heat period, soaking period and heating period of top.

5. High aluminum castable and precast block are used in walking beam and heating period of top.

6. Low cement combined with high aluminum castable and precast block are used for outlet end wall, and they both use brown fused alumina as aggregate.

7. In addition, the reheating furnace also uses insulation board and other kinds of ceramic fiber insulation materials.
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Come to know more details about properties of Al2O3-MgO-C refractory

Al2O3-MgO-C refractories are developed on the basis of high-performance magnesia and aluminium carbonaceous refractories, which are also an alternative material to high-alumina and dolomite brick ladle lining. But in contrast, made by acid-based two kinds of fire-resistant oxides, the aluminum magnesium carbon brick not only has excellent chemical and thermodynamic stability, but also has excellent thermal and mechanical properties.

(1) High penetration resistance to molten steel. The whole refractory lining can be formed by the expansion of spinel reaction between the alumina and the magnesia during use, effectively preventing the infiltration of the molten steel into bricks from the joint between bricks.

(2) Excellent slag resistance performance. In addition to the role of graphite, the spinel formation during using can absorb the FeO from slag to form a solid solution, and Al2O3 can react with the CaO of slag to form a CaO-Al2O3 compounds with high melting point, blocking the pores and increase Melt viscosity, to achieve the purpose of inhibiting slag penetration.

(3) High mechanical strength. Compared with MgO-C and Al2O3-C refractories, Al2O3-MgO-C refractories contain less graphite, usually 6% -12%, so its bulk density is high and with low porosity and high strength.There have many kinds of refractory products in our factory ,such as fire brick for sale ,refractory nozzle, refractory products, refractory nozzle. When you need any refractory products ,welcome to view our website to know more.
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Welcome to know the modulation of brick with refractory

The modulation of fire brick with refractory mud should follow the following principles:

(1) Pre-test and pre-masonry of various refractory mortars should be made before bricklaying to determine the bonding time, initial setting time, consistency and water consumption of different muds.

(2) modulation of different mud to use different equipment, and timely cleaning;

(3) modulation of different quality mud to use clean water, water to weigh accurately, to reconcile to be uniform, with the tone with the use. Has been prepared a good hydraulic and gas-hard mud can not be used with water, has been the initial setting of the mud may not continue to use;

(4) phosphate slurry with slurry to ensure that the provisions of the time to ensure that the expected refractory material, with the use with the tone, the mud has been modulated well without any water dilution. This mud is corrosive and must not be in direct contact with the metal shell.
There have many kinds of refractory products in our factory. Such as fire brick, fire brick for sale, refractory nozzle, refractory raw material. When you want to know more information, don't be hesitate to view our website to know more.
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Features and applications of silica mullite brick and special silica mullite brick

The main features of Silica Mullite Brick and Special Silica Mullite Brick are as follows: High strength, strong corrosion resistance, abrasion resistance, good thermal shock resistance, in the use of the process can continue to form a protective layer, reduce the ring.There have many kinds of refractory products in our factory. Such as fire brick for sale , refractory nozzle, refractory raw material.

Application: Mainly used for small and medium sized cement kiln transition zone, decomposition zone and cooling zone, in the use of three wind pipe of large cement kiln.Special silica mullite brick is based on silicon mullite bnrick, by improving strength, refractoriness under load, decreasing thermal conductivity. Mainly used in transition zone and cooling zone of large and medium sized cement rotary kiln.There have many kinds of refractory products in our factory. Welcome to visit our factory anytime.When you need any refractory products ,such as ceramic fiber felt, fire brick. Welcome to view our website to know more information about it.
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Welcome to know more about masonry of rotary kiln fire brick

Rotary kiln fire brick can be used ring masonry or staggered masonry masonry. The commonly used method of masonry is the ring-puzzle method.

The advantage of the ring-laying method is that each individual fire brick for sale ring is tightly pinched and can be independently secured. Which is conducive to the construction and inspection, but also conducive to the demolition and maintenance. Especially for brick masonry is often used for brick site.

Staggered masonry method has the advantage of brick and brick intertwined with each other, in the kiln body is not regular small kiln can effectively reduce the trouble often out of brick. However, the method of masonry and maintenance are not convenient, the current form of domestic refractory firebrick regularity is not good enough, the use of the brick masonry lining quality is difficult to guarantee, so only a very small number of kiln staggered masonry. If you need other ceramic fiber felt products, welcome to view our factory anytime.
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Boiler applied refractory products

Boiler applied refractory products does not need very high quality refractory products, as it does not need very high working temperature. However, as it has special working condition, which also need different products in different working place.

How to choose refractory products for your boiler?

First, Different boiler need different refractory kinds refractory products. When you choose refractory products, please make sure type of your boiler. For example, is it circulating fluidized bed boiler ??

Second Function of boiler also influence selection of refractory products. For example, does your boiler used for heating or electric power generation or other application??

The third one is what kind of fuel it use. coal , natural gas, firewood or others??

Before you choose refractory products, please make sure these questions. Generally speaking, furnace lining mainly use refractory products and insulating products. Refractory products mainly are standard fire brick for sale, diatomite brick and common building brick.

Except bricks, and boiler also need insulating castable, high strength castable, high alumina castable and fire clay.

Different kinds boiler need different level products according to boiler type and working temperature.If you need any refractory products ,such as ceramic fiber felt, fire brick ,refractory nozzle ,refractory raw material and so on.
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The characteristic and application of refractory castable

Refractory Castable which is a heat resistant concrete in effect and comes in various grades such as C1400, C1600, LC1600 Medium weight insulating.Browse Castable Refractories in the Foundry Service & Supplies, Inc. catalog including Insulating Castables,Dense Castables,Plastic Refractories.

Foundry Service offers a full line of products utilizing variables in aggregate, chemistry, aggregate grain sizing, and high purity binder systems to make high quality castables which meet specific property requirements of industrial furnace operators. These include Dense Castables, Insulating Castables, High Alumina Castables, Low Cement Castables, Gunning Castables, Rodding Castables, Gel Bonded Free Flowing Castables, Patching Castables and Plasters, and Precast Prefired Refractory Shapes. Typical installation methods include vibration casting, self-flowing, ramming, gunning, and patching / troweling.

Refractory castable containing calcium aluminate cement are used ubiquitously in a range of furnace lining application in the iron and steel, cement, glass, ceramic, and petronchemical industries. There have many kinds of refractory products in our factory. Such as ceramic fiber felt, fire brick for sale , refractory nozzle, refractory raw material. When you need any ceramic fiber products or refractory products ,welcome to contact us anytime.

Refractory castables can be used to create the monolithic linings within all types of furnaces and kilns. Do you need any refractory products ? There have many kinds of refractory products. Such as fire brick for sale, refractory materials. Welcome to view our website anytime. They can be further classified into the following sub-categories: conventional, low iron, low cement, and insulating for installation either by gunning or manually. There is a wide variety of raw materials that refractory castables are derived from, including chamotte, andalusite, bauxite, mullite, corundum, tabular alumina, silicon carbide, and both perlite and vermiculite can be used for insulation purposes.
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Refractories for reheating furnace present and future status

Refractory raw material has a great impact on type of reheating furnace. The progress of refractory technology and the quality of refractory performance not only affect the reheating furnace structure, but also influence the operation condition, maintenance and service life of the reheating furnace.?Refractories are widely used in metallurgical, chemical, petroleum,?machinery manufacturing, silicate,?power and other industrial areas.
The reheating furnaces play an important role in proce-ssing steel and its alloys for the production of finished products. The steel ingots, slabs or bars are heated in these furnaces to an even temperature throughout their body so that they can be properly rolled or pressed into strip,?plate,?rod, angle or any other shape as required.?The temperature generally varies from 1130' to 1450'c,?depending upon the quality of the steel,?size of the product, etc although the consumption of refractories per tonne of steel for the reheating furnaces is not much, the object for the consumers is to have better and better refractories for getting longer life with less number of shutdowns for intermediate repairs. This will ultimately lead to reduced cost for refractories.
Refractory materials are generally required to have the following properties:

1. Refractory material has steady volume stability and high consolidation strength at high temperature.
2. Refractory material has high structure strength at high temperatures.
3. Resistance to furnace slag and furnace gas chemical erosion.
4.It has anti-melting, high temperature resistance, reduce the wear and tear and other characteristics.
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