In the non-ferrous metal smelting industry, high alumina brick plays an indispensable role, its excellent characteristics make it suitable for a variety of key links and equipment.
1. Copper smelting
In the process of copper smelting, high temperature and complex chemical environment are involved from melting to refining. High alumina bricks are often used in the lining of copper smelting furnaces. Its high refractoriness, generally up to 1750℃ -1790 ℃, can effectively withstand the temperature of up to 1200℃ -1300 ℃ or even higher in the copper smelting process. Moreover, the copper smelting process will produce a variety of slag, these slag has different degrees of acid or alkaline, high alumina brick near neutral chemical characteristics make it have good resistance to slag erosion, reduce the frequency of furnace lining due to erosion and frequent maintenance or replacement, to ensure the continuity and stability of copper smelting operations, help improve copper production efficiency and product quality.
2. Aluminum smelting
In the upper structure of aluminum electrolyzer and some aluminum refining equipment, high alumina bricks are also used. In the process of aluminum smelting, although the electrolytic cell is mainly in a low-temperature electrolyte environment, the superstructure still faces certain heat radiation and high-temperature gas erosion. The thermal stability of the high alumina brick is reflected here, which can maintain the structural integrity in the environment of temperature fluctuations and avoid cracking or peeling caused by thermal expansion and cold contraction. At the same time, for some auxiliary heating equipment or furnace in the aluminum refining process, the high refractoriness and erosion resistance of high alumina bricks can ensure the normal operation of the equipment under the action of high temperature and aluminum liquid and refining agents, which provides a reliable lining guarantee for the smooth progress of the aluminum refining process, and helps to improve the purity and quality of aluminum products.
3.Lead and zinc smelting
The smelting process of lead and zinc is also an industrial process with high temperature and complex chemical changes. High alumina brick can be applied to the key parts of lead and zinc blast furnace, reverberatory furnace and other smelting equipment. For example, near the tuyere area of the blast furnace, the temperature is high and the airflow is washed violently, and the high strength and good thermal shock resistance of high alumina bricks are enough to withstand such harsh conditions and prevent premature damage of the furnace lining. In the slag line area of the reverberatory furnace, the corrosion resistance of high alumina brick to the slag of lead and zinc can effectively extend the life of the furnace lining, reduce the production cost, maintain the stable operation of the smelting process, and ensure that the output efficiency and quality of lead and zinc metal meet the requirements of industrial production.
4.Smelting of other non-ferrous metals such as nickel and cobalt
In the process of nickel and cobalt smelting and the extraction and refining of some other non-ferrous metals, whether it is the high-temperature furnace of fire smelting, or some drying and roasting equipment in wet smelting, high alumina bricks can play their advantages. In the high-temperature roasting of nickel cobalt ore, high alumina brick can resist the high temperature during the ore decomposition process and the corrosion of corrosive gases or slag that may be produced. In the subsequent drying process of wet smelting, high alumina bricks can withstand a certain high temperature and maintain a stable structure, which provides a strong refractory support for the integrity and efficiency of non-ferrous metal smelting process, and promotes the stable development of the entire non-ferrous metal smelting industry and the improvement of product quality. In short, high alumina brick with its excellent fire resistance, corrosion resistance and thermal stability and other characteristics, in the non-ferrous metal smelting industry in many links and equipment occupy a very important position, is to ensure the smooth progress of non-ferrous metal smelting production of one of the key materials.
