Steelmaking operation method adopting steel scrap crushed material to replace cooling agent

An operation method and crushing material technology, which are applied in the manufacture of converters, etc., can solve the problems of increased slag in the furnace, increased consumption of steel materials, increased production costs, etc., and achieve the goals of reducing molten iron consumption, reducing metal loss, and increasing production. Effect

Inactive Publication Date: 2020-08-18
XINJIANG BAYI IRON & STEEL
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Problems solved by technology

The use of such coolants to balance the heat in the furnace will not only increase the production cost, but also lead to an increase in the amount of slag in the furnace and an increase in the consumption of steel materials

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  • Steelmaking operation method adopting steel scrap crushed material to replace cooling agent

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Embodiment Construction

[0012] A steelmaking operation method in which steel scrap crushed material replaces coolant. The steps are as follows: process medium-sized scrap steel into crushed material by crushing, and at the same time require the specific gravity of the crushed material pile to be greater than 1.60t / m3, and transport it to the high-level silo of the converter; Calculate the heat required for melting 1kg of crushed material for scrap steel melting, and determine the amount of crushed material added according to the heat surplus in the furnace: Q scrap steel = m scrap steel × {C solid (t melting - t initial) + melting latent heat of scrap steel + C liquid • (tout-tmelt)}; the cooling effect of 1kg scrap steel when the tapping temperature is 1670°C is: Q scrap steel = 1441.97kJ / kg, the composition and temperature input heat balance calculation model of each furnace of molten iron, using high-level silo to add Crushed material to balance excess heat in the furnace.

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Abstract

The invention discloses a steelmaking operation method adopting a steel scrap crushed material to replace a cooling agent. The method comprises the steps of crushing medium-sized steel scraps into thecrushed material with the bulk specific weight greater than 1.60 t / m3, and transporting the crushed material to an overhead bunker of a rotary furnace; calculating the heat required for melting 1 kgof crushed material through steel scrap melting, and determining the crushed material added quantity according to the spare amount of heat in the furnace: Q steel scrap=m steel scrap*{C solid(t melting-t initial)+latent heat of melting of steel scrap+C liquid.(t output-t melting)}, wherein the cooling effect of 1 kg of steel scraps at the tapping temperature of 1670 DEG C is as follows: Q steel scrap=1441.97 kJ / kg, and through each furnace of molten iron components and temperature input are calculated through a heat balance calculation model, and the space heat in the furnace is balanced by adding the crushed material into the overhead bunker

Description

technical field [0001] The invention relates to a steelmaking operation method in which scrap steel scrap material replaces coolant. Background technique [0002] In the past few years, resources such as iron concentrate powder and pellets have been in short supply, and the market price has remained high. However, with the intensification of national environmental protection inspections, some strip steel companies that did not meet the standards were gradually banned. At present, a large number of intermediate frequency furnaces and small electric furnaces have stopped production, and the situation of scrap steel in the market is in short supply has changed in one fell swoop. The use of scrap steel resources to reduce iron consumption and increase steel production has become an important measure to reduce the overall production cost of iron and steel enterprises. At the present stage, iron and steel enterprises carry out the work of reducing iron consumption mainly by incre...

Claims

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Application Information

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IPC IPC(8): C21C5/28
CPCC21C5/28
Inventor 韩雨亮孙学刚吴军
Owner XINJIANG BAYI IRON & STEEL
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