MG Fire Bricks for Copper Smelting Furnace from Factory

Magnesium-chromium material has the advantages of high refractoriness, high-temperature strength, strong corrosion-resistance to alkaline slag, and excellent thermal stability. It also has certain adaptability to acid slag and is widely used in copper smelting furnaces, lower tanks of molten steel refining RH furnaces, cement kiln firing zone, circulation pipe and other key parts, various copper smelting furnace linings, etc. The application of magnesia-chrome bricks in copper smelting furnaces is introduced below.

MG Fire Bricks for Copper Smelting Furnace

Application of Magnesia Chrome Brick in the Copper Smelting Furnace

Magnesium-chromium refractories are widely used in high-temperature equipment in the non-ferrous smelting industry, among which the copper smelting industry is the most representative. Figure 3 shows the bottom blowing continuous copper smelting furnace with advanced technology at present. The configuration technology of refractory materials used in this equipment is one of the key technologies affecting the production efficiency and product quality of bottom-blown continuous copper smelting.

Figure 3 Schematic diagram of bottom blowing continuous copper smelting furnace

Magnesium-chromium refractory is currently the most suitable furnace lining material for smelting furnaces in the copper industry. One of the main reasons is that magnesia-chrome bricks have good corrosion resistance to slag of different basicity in the copper industry. Different types of magnesia-chrome bricks are selected according to different parts of the furnace lining and service environment. Usually, the magnesia-chrome brick selected for the slag line position is electrofusion recombination, while the magnesia-chrome brick selected for the tuyere position is semi-recombination or self-combination. The copper smelting furnace has a large amount of slag, and the slag has a low viscosity, which has strong wettability and permeability to magnesia-chromium refractories.

Therefore, when magnesia-chromium refractories are used in copper smelting furnaces, the infiltrated metamorphic layer is thick, which is prone to structural spalling. Cherif et al. studied the corrosion resistance of magnesia-chromium bricks prepared from sintered aggregates and fused aggregates by simulating the environment of copper converters and using the rotary anti-slag method.

The results show that the correlation between the erosion depth of slag and the ratio of CaO/Fe2O3 (the amount of substance) is greater than that of CaO/SiO2. And the larger the ratio of CaO/Fe2O3, the more severe the erosion. Wang Jibao et al. conducted a structural analysis of the fused and combined magnesia-chrome bricks in the tuyere area of the Noranda furnace. It is believed that the erosion of copper concentrate to magnesia-chrome brick is mainly manifested by the penetration of matte. The infiltration way is mainly along the brick cracks, grain boundaries, pores, and micro-cracks, and the infiltrated matte destroys the structure of the brick body. But it does not react with oxides in magnesia-chrome bricks. At the same time, under the condition of oxygen-enriched smelting, the damage to magnesia-chrome bricks at the working face is caused by the reaction of iron oxides and SiO2 in copper slag with low-melt substances in magnesia-chrome bricks to form a liquid phase with a lower melting point.

With the increase of the distance from the working surface, the damage of magnesia-chrome brick is mainly manifested in the infiltration of matte into the brick, resulting in structural spalling and thermal spalling of the brick body. Zou Xing et al. studied the erosion of magnesia-chrome bricks by FeO-SiO2 slag for copper blowing and found that the eroded magnesia-chrome bricks are obviously divided into slag layer, erosion area, and original brick area. Among them, the slag layer is mainly based on mafic olivine and forsterite, and the spinel phase is distributed in it. The erosion zone is mainly composed of periclase fultenite and spinel phases.

High-quality MG Fire Bricks, magnesia chrome bricks uses in the Copper Smelting Furnace. Get more info on the Refractory Bricks for Copper Smelting from the Internet. Furnace refractory lining material manufacturers will provide you with high-quality magnesia-chromium refractory brick lining products and high-quality after-sales service. Please visit https://kilnrefractory.com/, and leave us your specific needs.