Product Description
Carbon Brick
Carbon brick is a kind of carbon refractory materials, which contains carbon more than 80%.
Carbon is an ideal material for lining vessels that is under severe chemical or physical operating conditions, because carbon has stable chemical stability,which is resistant to chemical attack, such as the erosion of acid, alkali, salinity, and organic solvent. In addition, such bricks are featured with good thermal shock resistance, low thermal expansion coefficient, excellent thermal conductivity, etc. One important thing can not be ignored: carbon brick is easily oxidized in the oxidizing atmosphere. Carbon brick is widely used in the metallurgical industry, especially in the blast furnace.
Carbon Bricks Manufacturing Process
Production process of carbon brick is almost the same as that of the other refractory brick, with the sintering temperature at 1300 ~ 1450 ºC, holding time about 20 hours, the total firing time 240 ~ 420 hours, and drawing at 40 ~ 60 ºC. But the calcination of the raw material and firing and products must at the reducing atmosphere, to prevent carbon from oxidation at high temperature.
Holding time : 20 hours
Total firing time: 240 ~ 420 hours
Drawing temperature: 40 ~ 60 ºC
Carbon Bricks Specification
The raw materials of carbon brick are anthracite, coke, and graphite, and the combined with binders, such as the asphalt, tar, and anthracene oil, etc. Burned granular anthracite is the aggregate of carbon bricks, accounting for 60%. The size of the particle depends on the volume of the products: for the large brick, it is about 8-12mm, and for the small one, it is about 4-6mm. Anthracite should be calcined before being used, in order to exclude volatiles, sulfur content, and moisture content. At the same time, to improve the volume stability, mechanical strength and oxidation resistance. Coke is added in the form of power after being dried to avoid forming difficulties caused by high moisture and cracks produced in the process of firing. In the coke power, the particle size that is less than 88 micron accounts 70%.
As for the asphalt, it should be melted and dehydrated before being used, making the moisture is less than 0.2%. and the dehydration temperature should be at 120 ~ 160 ºC. In addition, powered coke or coal power is added as the protection filling in the firing process of firing, to prevent the adobe from oxidation.
Carbon: about 80%
Aggregate: burned granular anthracite, accounting for 60%
Large brick size: about 8-12mm
Small brick size: about 4-6mm
Other special content: sulfur, coke and coal power, asphalt
Carbon Bricks Applications
Carbon brick can be used in the metallurgical industry, especially in the blast furnace, electroplating industry, chemical industry, and paper manufacturing industry, etc. For example:
Uses and Applications
Bottom and hearth of the blast furnace,
Lining of the bosh, and launder;
Aluminum reduction cell, and ladle;
Pickling tank, and reaction tank;
Calcium carbide furnace, and ferroalloy furnace;
Plating bath, and autoclave, etc.
FAQ
♥ Do you provide samples?
Yes, samples are available for you to check our quality.
Samples delivery time will be about 3-10 days.
♥ What about the lead time for mass product?
The lead time is based on the quantity,about 7-12days.For graphite product,apply Dual-use items
license need about 15-20working days.
♥ What is your terms of delivery?
We accept FOB, CFR, CIF, EXW, etc. You can choose the most convenient way for you. Besides that,
we can also shipping by Air and Express.
♥ Product packaging?
We are packed in wooden case, or according to your requirements.
Please note that the price on made in China is a rough price.The actual price will depends on raw materials,
exchange rate ,wage and your order quantity .Hope to cooperation with you,Thanks!