Short-process steel-making technology and steel-making device

Abstract

The invention relates to steel-making technologies, and provides a short-process steel-making technology. A vertical furnace and an electric furnace are used for reducing iron core powder. The iron core powder and pulverized coal are firstly made into carbon-bearing pellets; the dried carbon-bearing pellets are put in reduction chambers of the vertical furnace; the reduction chambers are heated through a combustion chamber, so that a reduction reaction happens between iron oxide and carbon to generate metallized pellets; and the metallized pellets are put in the electric furnace to be prepared into molten steel. The invention further provides a short-process steel-making device. The short-process steel-making device comprises the vertical furnace and the electric furnace. The vertical furnace is provided with at least one combustion chamber and at least one reduction chamber. Each reduction chamber is adjacent to the combustion chamber. The reduction chambers are isolated from the adjacent combustion chamber by furnace walls, and all the reduction chambers are communicated with the electric furnace through material pipes. It is guaranteed that the reduction reaction in the reduction chambers is carried out smoothly through the combustion chamber in a flame isolation heating manner, and meanwhile reduced high-quality sponge iron can be prevented from being oxidized secondarily; and the generated sponge iron can be directly guided into the electric furnace to be smelted into high-quality molten steel, and the technology and device are both simple.

Description

technical field [0001] The invention relates to a steelmaking process, in particular to a short-flow steelmaking process and a steelmaking device. Background technique [0002] The short-process electric furnace process has developed rapidly in recent years. The proportion of electric furnace steelmaking in the total steel production has increased from 7.3% in the early 1950s to 32% to 35% in recent years, especially in the United States and the European Union. The proportion of steel has reached more than 50%. The advantages of "short process" in terms of high-end products, diversified energy sources, and diversified raw materials have attracted people's attention. [0003] Compared with the traditional blast furnace-converter long process, the short process of electric furnace has many advantages, mainly as follows: [0004] (1) Less investment. Electric furnace short-process steelmaking mainly uses scrap steel as raw material, which reduces the huge investment in blast...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a short process steelmaking process, which aims to solve the problem that the quality of molten steel prepared by the existing short process process is not high

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