Cheap Brown Fused Alumina Manufacturers Canada

Carbon materials are reducing agents for aluminum oxide abrasive smelting. There are many types of carbon materials, and their reactivity varies. However, the smelting time of corundum abrasives is relatively long, so carbon materials with various reactivity can basically be used. The most commonly used carbon materials are stone tar, metallurgical coke and anthracite.

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The fixed carbon in the white alumina chemical composition is an effective component of the reducing agent. Volatile matter and moisture are ineffective components. Ash is a harmful ingredient. The higher the effective ingredient, the better. Although ineffective ingredients are not harmful to product quality, they will increase power consumption and green silicon carbide raw material consumption, and also affect the stability of the furnace and ore, so the less the better.(cheap brown fused alumina manufacturers canada)

It consists of Al2O3, Fe2O3, SiO2, CaO, MgO and S. The presence of impurities such as Fe2O3 and SiO2 in the ash will increase the brown aluminum oxide power consumption and the amount of reducing agent. CaO and MgO cannot be removed, which will remain in the corundum product and affect the product quality. Sulfur is a highly undesirable impurity in aluminum oxide grit materials, which creates conditions for the production of aluminum and calcium sulfide.

(cheap brown fused alumina manufacturers canada)In addition to the chemical composition of the carbon material, the price of the black corundum material must also be considered. Metallurgical coke and petroleum coke have high fixed carbon content, few ineffective components, low ash content, but high prices. Anthracite is lower in price but slightly worse in quality. The black silicon carbide specific choice is based on local resources and the principle of obtaining materials locally to achieve the greatest economic effect.

The carbon material has particle size requirements. The brown fused alumina particle size is too fine, the flying loss and the loss caused by burning in the furnace are relatively large. The particle size is too coarse, the diffusion area in the furnace is not enough, and the distribution is uneven, which is not good for smelting. On the other hand, the black alumina particle size of the carbon must be matched with the alumina bulkiness, otherwise segregation will occur.(cheap brown fused alumina manufacturers canada)

With a large electric furnace capacity, the pink corundum particle size of the carbon material can be correspondingly larger. 2500KVA electric furnace generally uses 5mm carbon material. It is hopeless to use carbon materials to adjust the charge resistance of the material, because brown corundum is generally smelted with a thin layer, and the amount of carbon in the charge is very small, black aluminum oxide abrasive 70 grit which has little effect on the charge resistance.

(cheap brown fused alumina manufacturers canada)Almost all arc light is exposed to the furnace surface during the white corundum refining period, and the heat loss is extremely large. If low voltage is used, the arc beam can be shortened and the heat loss can be reduced. Therefore, it is necessary to strictly control the content of fractions. The super corundum white power is 1.1 times the rated power, and the low power is equal to 75% of the rated power. Electric furnace input is still widely used for manual operation.

Use low power during silicon carbide abrasive refining. The most harmful of the reducing agents is ash. There is a corresponding relationship between the carbon particle size and the capacity of the electric furnace. Manual operation to adjust the electrode at rated current. Automatic control can be used, but the fused aluminum oxide electric furnace does not want to have too frequent electrode activities, so the control system should be provided with a delay device.(cheap brown fused alumina manufacturers canada)