Nonferrous Industry Solutions - ZHENJIN REFRACTORIES

We continuously optimize the technical properties of our products to meet the increasing demands of this industry. Together with our technical expertise and the latest construction methods, this is the basis for optimum refractory solutions in the ferro-alloy industries.

Solution

Refractory is an important basic material in the non-ferrous metallurgical industry, and is the main bearer of physical and chemical erosion and mechanical damage of high-temperature melts. It has strict requirements on refractoriness, thermal stability, slag erosion resistance, and size and structure of refractory bricks.

The damage of non-ferrous metal refractories is mainly caused by the erosion of slag with relatively complex composition, and it is also an important factor limiting the increase of non-ferrous metal smelting temperature, which seriously affects the development of non-ferrous metal enhanced smelting technology.

The refractories used in the non-ferrous metal industry mainly include magnesia-chromium refractories, silicon carbide refractories, bauxite corundum refractories and aluminum-silicon refractories. Among them, magnesia-chromium refractories are widely used in copper smelting, nickel smelting and lead smelting industries. The characteristics of the three metal smelting are: the flue gas contains a large amount of SO₂gas; the melt not only contains oxides, metals, but also a lot of sulfides, the melting temperature of the melt is relatively low, but the flame fluidity is good; The slag is FeO·SiO₂series slag, and the amount of slag is very large; the temperature in the furnace fluctuates greatly, and the melt scours the refractory material seriously. Magnesium-chromium refractory has strong resistance to iron-silicon slag erosion and SO₂erosion, and also has good resistance to melt erosion. It is currently the most used refractory for the three metal smelting.

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