Method for heating steel scrap and increasing smelting steel scrap ratio

A technology of steel scrap ratio and scrap steel, which is applied in the field of heating scrap steel and increasing the ratio of smelting scrap steel, can solve the problems of low smelting efficiency and low ratio of smelting scrap steel, and achieve the effects of reducing smelting cost, improving efficiency and speeding up

Inactive Publication Date: 2017-11-24
安徽盛博冶金环保科技有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for heating scrap steel and increasing the ratio of smelting scrap steel to solve the problems of low ratio of smelting scrap steel and low smelting efficiency in the existing converter steelmaking technology

Method used

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  • Method for heating steel scrap and increasing smelting steel scrap ratio
  • Method for heating steel scrap and increasing smelting steel scrap ratio
  • Method for heating steel scrap and increasing smelting steel scrap ratio

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Embodiment 1

[0022] Such as figure 1 with 2 As shown, the scrap steel heating furnace includes a heating furnace body 1, a first regenerative burner 2, a second regenerative burner 3, a reversing valve 4, a temperature measuring instrument 9, a gas supply device 4 and a smoke exhaust device 5, and the heating furnace The body 1 includes an upper furnace body 11 and a lower furnace body 12. Both the upper furnace body 11 and the lower furnace body 12 have a cylindrical structure. The lower furnace body 12 is arranged horizontally, and the upper furnace body 11 is arranged obliquely. The bottom plate of the lower furnace body 12 is an included angle C, and the range of the included angle C is 0-120°. Specifically, the optimal value is obtained according to the experimental data. The lower end of the upper furnace body 11 communicates with one end of the lower furnace body 12, and further , in order to facilitate processing, the upper furnace body 11 and the lower furnace body 12 can be manu...

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Abstract

The invention relates to a method for heating steel scrap and increasing the smelting steel scrap ratio. The method comprises the following steps that firstly, the steel scrap is added to a heating furnace body through a feeding opening; secondly, a gas supply device sprays mixed gas formed by mixing air and fuel according to a certain proportion into the heating furnace body through one of regenerative burners, the mixed gas is ignited, and meanwhile an exhaust device sucks waste gas in the heating furnace body through the other regenerative burner and exhausts the waste gas out of the heating furnace body; thirdly, after the mixed gas is heated for a period of time, the functions of the two regenerative burners are converted by adjusting a reversing valve; and fourthly, the steps mentioned above are repeated for 3N times till the steel scrap is heated to the preset temperature, and at the moment, heating is stopped. According to the heating method, the steel scrap in the steel scrap heating furnace is preheated, the initial temperature of the steel scrap entering a converter is increased, the converter temperature rising speed is increased, the smelting efficiency of the converter is improved, the proportion of the steel scrap in the raw materials in the smelting process is increased, and the smelting cost is lowered.

Description

technical field [0001] The invention relates to the technical field of smelting, in particular to a method for heating scrap steel and increasing the ratio of smelting scrap steel. Background technique [0002] In the metallurgical industry, there are two main sources of steelmaking raw materials: molten iron and scrap steel. Scrap steel is a recycled resource, so it has the advantage of low cost compared to molten iron. Steel mills should use as little molten iron as possible and more steel scrap in smelting, which is not only conducive to resource protection, but also conducive to energy conservation, reduction of environmental pollution, and promotion of sustainable development of resources. [0003] At present, in the converter smelting process, the proportion of scrap steel is generally 10-15%. With the continuous accumulation of scrap steel in social production, scrap steel has the advantage of lower cost than molten iron, and a high proportion of scrap steel is requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/56C21C5/46
CPCY02P10/143C21C5/565C21C5/46
Inventor 周春林
Owner 安徽盛博冶金环保科技有限公司
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