Castable Refractory Cement Manufacturer

The raw materials of high-quality bauxite and high-quality lime are mixed in a certain proportion; after sintered, the clinker with aluminate as the main component is obtained; the clinker is further ground into fine powder; Finally, a fire-resistant hydraulic cementitious material called Castable Refractory Cement is produced. Refractory Cement has a refractoriness of not less than 1580°C. According to the composition, it can be divided into alumina refractory cement, low calcium aluminate refractory cement, calcium magnesium aluminate cement and dolomite refractory cement.

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Use of Refractory Cement

Refractory cement is also be called furnace cement. Refractory cement can be used to bond various refractory aggregates (such as corundum, calcined high alumina bauxite, etc.) into refractory mortar or concrete for lining of cement rotary kiln and other industrial furnaces.

Precautions after Construction of Refractory Cements Lining

After the refractory cement lining is completed, an boiler-drying is required to evaporate excess water. Avoid the explosion of the boiler when start-up operation, and extend the service life of the refractory lining.

When the refractory cement lining is on baking, it should be slowly heated to avoid excessive temperature rise to prevent local bursting. When it comes to cooling of the refractory cement lining, it should also be slow, and avoid forced ventilation.

Castable Refractory Cement Manufacturer

Rongsheng Castable Refracory Cement Manufacturer has experienced more than 10 years in the refractory industry and currently has a refractory brick production plant and a castable production plant, and a separate office. RS unshaped refractory production line has been put into production, fully automatic, efficient production process, to provide you with high quality refractory cement and other castable products. To get Castable Refractory Cement Price, please contact our sales manager, Make a free quote.

The Application of Corundum Castable

Corundum castable is made from corundum aggregate, fines, binders and additives. Corundum castable has the advantages of high mechanical strength, excellent abrasion resistance, high refractoriness, good slag corrosion resistance, low creep rate and so on. Al2O3 content in corundum castable is above 90%. Raw materials used for corundum castable production are: tabular corundum, white corundum, brown corundum and so on. Composite corundum castable such as chrome corundum castable, application of corundum castable, zirconia corundum castable are widely used in different industrial furnaces areas.

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Corundum castable used in heating furnace tapping spout are composed of fused corundum( brown corundum or sub-white corundum) aggregate, fused corundum powder, a-Al2O3 micro powder, SiO2 micro powder, Cr2O3 micro powder( or zircon micro powder) and high purity calcium aluminate cement.

Application of Corundum Castable

Corundum refractory castable  is widely used in steel ladle working lining, sliding nozzle valve, tapping nozzle, electric arc furnace cover triangle zone and so on. Besides, corundum castable are also used in places where need good abrasion resistance, for example, rotary kiln, coal injection tube, circulating fluidized bed boiler, RH furnace immersion tube outer lining, petrochemical industry high temperature catalytic cracking reactor working lining, etc.

Sometimes, black silicon carbide is added into corundum castable raw materials, so the wearing resistance is greatly improved, it is very suitable for CFB boilers.

Corundum Castable Physiochemical Index

Corundum Castable Manufacturer Supplier

RS Group Kiln Refractory Bricks is the manufacturer & supplier of corundum castable. Our corundum castable is with high quality and competitive price. Contact RS Group for more details.

RS Group GIFA 2019 Exhibition Time

After intense preparations, RS Group’s exhibition staff arrived at GIFA 2019. We are ready to show the world the advantages of RS refractory products and our production technology. The following is the RS Group GIFA 2019 Exhibition Time.

RS Group exhibition site uses the Chinese red witch is the characteristics of Chinese. Our refractory bricks models and RS products brochures are on display. Welcome the you from all over the world to get a glance of RS refractory products.

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At our exhibition, Rongsheng Group will welcome visitors with the fullest enthusiasm. Our products, such as firebricks, unshaped refractories, graphite electrodes, insulating refractories and so on are with competitive. Our service, contains the customization, refractory products cn be designed for the special working conditions. Our technology, with refractory projects design, construction and maintenance, etc.

In 25th, yestory, at RS Group booths, there have been many visitors. Under the guidance of our booth staff, the visitors learned more about RS Group’s refractory products and then took photos with them. We look forward to the more visitors in the next following days!

If you are attending or want to attend GIFA 2019 in Exhibition center in Dusseldorf, Germany. Don’t miss us, RS Group, Booth No.: Hall 4 – C39. Date: June25 ~ 29, 2019.

Noranda Furnace Refractory

Noranda furnace is formerly called Noranda reactor, it is horizontal cylindrical bath smelting furnace. Copper concentrate ore, copper containing material, flux and fuel are proportionally mixed and loaded into furnace by thrower. Oxygen rich air are blasted into furnace from tuyere, which makes the molten bath in a stirring state, raw material can have desulfurization reaction and slag making reaction, and produce matte with about 70% copper content.

Noranda furnace has strong adaptation to raw material, large capacity and high efficiency, flue gas SO2 concentration is high and can meet the requirement of sulfate acid making. It is also self heating smelting furnace, with low energy consumption. Noranda furnace copper smelting belongs to oxygen-rich bath smelting. It can realize drying, sintering, smelting and blowing smelting slag making at the same time, with high smelting intensity, intense bath agitating. To ensure the smooth going of smelting process and the service life of furnace, furnace lining refractory should have very high performance.

The most vulnerable parts of Noranda furnace are tuyere, furnace mouth, material loading-end combustor and furnace cylinder top corresponded to slag discharging end combustor, sediment zone slag line upper and lower part wall and slag-end wall. 

At tuyere zone, large amount of oxygen enriched air enters into furnace, accompanied with fierce agitating and spraying, chemical reaction is intense, corrosion is severe, meanwhile, furnace temperature will fluctuate frequently and cause thermal shock, mechanical abrasion is also happened when poking tuyere. So the working atmosphere is very harsh, damage speed is quick. It directly determined the service life of Noranda furnace. Furnace mouth would suffer high temperature smoke current scouring, mechanical impaction during cleaning slag, is also easy to be damaged.
Sediment zone slag line upper and lower cylindrical wall and slag-end wall are exposed in high temperature, and as slag layer will frequently change position during slag discharging and copper discharging, this part will suffer severe erosion and high temperature current scouring, is also vulnerable.

Material loading end wall and loading mouth. As material is water containing, cold air will also enter furnace from loading mouth, the furnace lining of material loading mouth will deform and form bump.

Feeding end combustor and slag discharging end combustor surrounding furnace top lining mainly suffer the direct scouring of flame, local thermal load is overlarge and with the coaction of large amount cold air, thermal shock is very severe.

According to the production condition of Noranda furnace, refractory materials used in it should have high purity, good slag corrosion resistance, high mechanical strength, good scouring resistance, abrasion resistance, good thermal stability. Earlier, furnace lining where suffers severe damage is mainly built by fused cast magnesia chrome bricks, other parts are built by direct bonded magnesia chrome bricks. The quantity of fused cast magnesia chrome bricks accounts for 30%~40% of the total firebricks consumption. With the improvement of furnace design, the damage degree of the damage tending parts is greatly reduced, along with the enhancement of firebrick quality, now fused grain rebonded magnesia chrome bricks have replaced fused cast magnesia chrome bricks. Although fused cast bricks have good abrasion resistance, erosion resistance and mechanical scouring resistance, their thermal shock resistance is poor and it is also expensive. The rest parts still use direct bonded magnesia chrome bricks.

Special Grade Phosphate Bricks

Special Grade Phosphate Bricks Description

Phosphate bricks have been recognized as high quality linings for cement kilns and lime kilns. Phosphate bricks include two types: one is phosphate bonded high alumina brick (referred to as phosphate brick), and the binder is phosphoric acid solution with a concentration of 42.5% ~ 50%; the other is phosphate bonded high alumina wear resistant bricks ( wear-resistant bricks), and the binder is aluminum phosphate solution prepared from industrial phosphoric acid and industrial aluminum hydroxide. Among them, phosphate brick has good chemical stability, high thermal strength and good wear resistance. It is often used at expansion port of machine shaft kiln and high temperature zone kiln lining, rotary cement kiln cooling zone and transition zone. The corrosion resistance of wear-resistant bricks is better than that of phosphate bricks. It is commonly used in areas of machine shaft kiln where abrasion is severe,  as well as cooling machine an and kiln preheating parts of the rotary kiln.

Special grade high alumina bricks contain zirconium, their thermal shock stability and anti-stripping property are good, Special grade phosphate brick is developed and produced in recent years. Special grade phosphate brick is made from phosphate solution binder with a concentration of 42.5%~50%, alumina clinker aggregate calcined above 1600 °C in rotary kiln. During the application of the special grade phosphate brick, the phosphoric acid and the calcined bauxite fine powder react with the refractory clay to form a bond mainly composed of cristobalite-type orthophosphate.

Special Grade Phosphate Bricks Characteristics

High normal temperature compressive strength, good thermal shock stability, high Refractoriness under load temperature, accurate dimensions, large bulk density and good wear resistance.

Special phosphate brick has the advantages of ordinary phosphate brick: high normal temperature compressive strength, good wear resistance, refractoriness under load temperature is basically equivalent to semi-direct combined magnesia chrome brick, superior to anti-spalling high alumina brick, and has good thermal shock stability.

For transition zone with large temperature fluctuation, special grade phosphate bricks have obvious performance advantages: high temperature strength and strong resistance to thermal stress and mechanical stress in the kiln, excellent adaptation to cylinder body ellipticity changes at wheel belt parts.

Secial grade phosphate brick has higher bulk density and lower permeability, which greatly improves its thermodynamic performance and chemical corrosion resistance. The harmful components in coal powder fluctuate greatly, especially the SO3 component is high and unstable. Special grade phosphate brick is almost neutral and not sensitive to alkali corrosion, so it is more suitable for the transition zone where lining coating is frequently sprayed and damaged.

Special Grade Phosphate Bricks Physiochemical Index

Special Grade Phosphate Bricks Applications

Special grade phosphate bricks are suitable for transition zone kiln mouth of rotary kiln and other parts that firebricks are easy to fall off, and are suitable for sintering zone. The use of special phosphate bricks in the transition zone, the service life of the bricks is basically matched with the magnesia chrome bricks.  Special grade phosphate bricks are also used in mechanical shaft kiln, lime kiln, carbon industry rotary kiln and so on.