Carbon bricks for blast furnaces. Carbon bricks have high thermal conductivity, low wettability, and low permeability to molten iron. Therefore, carbon refractory materials are widely used in the furnace bottom and hearth of iron-making blast furnaces. Carbon refractory materials are also used in the furnace waist, belly, and lower furnace body of some blast furnaces. After the use of carbon refractory materials, the service life of blast furnaces is significantly extended, and furnace bottom or hearth burnout accidents rarely occur.

Blast Furnace Carbon Bricks

In order to adapt to the large-scale blast furnace and the adoption of enhanced smelting technology, Rongsheng Refractory Brick Manufacturer has developed higher-performance blast furnace lining materials in response to the increasingly worsening working conditions of lining materials. Rongsheng blast furnace carbon bricks include impregnated high-density carbon bricks, semi-graphite carbon bricks using electric calcined anthracite as raw materials, semi-graphite-silicon carbide carbon bricks with a small amount of silicon carbide, microporous carbon bricks, and high-temperature hot-pressed carbon bricks produced by adding pure silicon, silicon carbide, and alumina, as well as self-baked carbon bricks produced by a vibration molding process that is not baked before leaving the factory and are baked into a whole by relying on the heat of the oven and the initial operation after being built into the blast furnace.

Anthracite is mostly used as raw material for the production of blast furnace carbon bricks. The ash content is generally 5% and the volatile content is 8%. It needs to be heated in a vertical electric furnace in advance. Other raw materials include artificial graphite and special additives (metal and oxide powders), etc. The binder is heat-treated dehydrated coal tar pitch.

Ordinary Blast Furnace Carbon Bricks

Ordinary blast furnace carbon bricks are used to build medium-sized blast furnaces with a volume of 1000~2500m3 and low smelting strength. High-quality anthracite (calcination temperature of about 1250℃) is used as the main raw material, and a certain amount of metallurgical coke and graphite are added. After extrusion molding, the green billet is loaded into the roasting furnace for roasting, and the temperature should reach above 1100℃. After roasting, it is machined using milling machines and planers according to the drawings provided by the user. The processed carbon bricks are pre-installed and the gaps between adjacent blocks are checked at the manufacturing plant, and they are sent to users after passing the inspection.

Metallurgical Industry Standard YB2804-1991 stipulates the physical and chemical indicators of ordinary blast furnace carbon bricks. Rongsheng blast furnace carbon bricks also follow this standard. At the same time, Rongsheng Refractory Manufacturer can also customize the indicators and sizes of blast furnace carbon bricks according to the actual working conditions of customers.

High-Density Carbon Bricks for Blast Furnaces

By impregnating ordinary carbon bricks with coal tar once, the volume density and mechanical strength of ordinary carbon bricks can be significantly improved. Carbon bricks produced by this process are called high-density carbon bricks. The porosity of high-density carbon bricks is reduced, which can reduce the penetration of molten iron or slag. It is used to build the full furnace bottom or the lining of the blast furnace for non-reinforced smelting. Rongsheng Refractory Manufacturer can provide high-quality ordinary blast furnace carbon bricks and high-density carbon bricks that have been impregnated and twice roasted.

Rongsheng Refractory Brick Manufacturer

Rongsheng is a powerful manufacturer and seller of refractory bricks. Rongsheng can provide the design, supply, and construction of lining materials for high-temperature industrial furnaces. Rongsheng’s blast furnace carbon bricks and high-density carbon brick products are of high quality and long service life. If you have a project that requires the purchase of high-quality blast furnace carbon bricks, electric furnace carbon blocks, and aluminum electrolytic cell carbon blocks, please choose Rongsheng. Contact Rongsheng for free samples and quotes.