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Oxygen generating equipment should be in the smelting indust

Time:2014-08-13 14:42 Hit:

Oxygen steelmaking: oxygen steelmaking has been widely used for all countries, to become the leap development of iron and steel industry is one of the important way. The dominant form of oxygen steelmaking are: pure oxygen top-blown converter, electric furnace steelmaking solitude or bottom blowing steelmaking and open hearth steelmaking. Each of converter steelmaking oxygen consumption of per ton steel 50 ~ 60 m 3; Electric furnace steelmaking solitude every oxygen consumption of per ton steel 10 ~ 25 m 3; Open hearth steelmaking every oxygen consumption of per ton steel 20 ~ 40 m 3. Electric furnace with oxygen can accelerate the burden of the melt and the oxidation of impurities, which means that the electric furnace oxygen can improve the production capacity and can improve the quality of electric furnace per oxygen consumption of per ton steel in accordance with the different varieties of steel and difference, the oxygen concentration is 90% ~ 94% of the oxygen enrichment. Small and medium-sized steel mill obvious characteristics of oxygen used in eaf smelting, with oxygen is not big, about 3 / h is in commonly 1000 ~ 1000 Nm, don't need nitrogen and intermittent gas. If use air separation investment high operating cost is big park is not convenient. Psa oxygen generating process can meet the needs of electric furnace steelmaking, quick effect and the investment and operation. At present, the domestic manufacturer generally used, the benefit is obvious.

Cardiac ironmaking technology

Seller blast furnace ironmaking

Oxygen-enriched blast furnace coal injection can improve the coal injection volume, significantly reduce coke rate increase production. More coal instead of coke, is cost saving, increase blast temperature alone could not achieve a goal. The purity of oxygen enrichment requires only a few percentage points more than the air oxygen and the effect will be obvious. If air separation ratio of making pure oxygen air, more waste of psa oxygen generation technology develops very fast, big flow of rich YangJi just the right, which laid a foundation for the promotion of this technology.

Denominated in smelting reduction ironmaking melted

Reduction iron-making: the 21st century, the development of iron and steel industry is the basic requirement of eliminate the pollution of the environment. To fundamentally change the pollution situation of steel industry, many developed countries have invested heavily to develop smelting reduction ironmaking technology. Smelting reduction by pure oxygen combustion of coal, coke ironmaking instead. At the same time, to produce a large number of high calorific value gas and clean energy as output. It is a new way for the development of ironmaking technology, its purpose is the generation of coke and coal with powder ore iron directly, neither coking and sintering the ironmaking process is simplified. To the attention in many countries. The purpose is to replace the blast furnace smelting reduction. The smelting reduction process with two steps, namely, first in shaft furnace (ore) or in a fluidized bed (ore)

The ore prereduction, then enter the final reduction furnace. To the final reduction furnace in coal and oxygen, coal combustion produces the reducing gas heat and H 2 and CO will be after the melting of prereduction process and further reduction of hot metal and slag, H 2 and CO for reducing furnace as a reducing agent. Compared to the blast furnace process, the first characteristic of smelting reduction is coal can not without coke coke oven building; Second, most use oxygen without wind. Currently the only has smelting reduction technology is used in industrial production of Corex process.

The modern blast furnace for hundreds of years of history, its technology has reached a quite perfect. But in the increasingly perfect and large-scale at the same time, also brought a long process, large investment and the environment pollution problem. As the accumulation of the world's iron and steel scrap, beneficial to reduce the electric furnace process developed rapidly, this requires using direct reduction a new technology to produce sponge iron power supply furnace steelmaking. In addition, due to the shortage of coking coal resources increasingly, coke oven ageing and the pollution is becoming more and more attention of coke oven, in the eighty s, with the developed countries are seeking to develop other no coke - smelting reduction ironmaking process. The Corex process has achieved industrial production. Taken together, the current ironmaking process is developing toward a focal little or no coke ironmaking, but direct reduction and smelting reduction technology are suitable for such development direction. So our country should moderate development of direct reduction and smelting reduction technology.