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Slagging method for electrosmelting

An electric furnace smelting and slagging technology, which is applied in the field of metallurgy, can solve the problems of severe slag boiling, lining erosion, and thin slag, and achieve the effects of reducing lining erosion, increasing slag viscosity, and reducing production costs

Inactive Publication Date: 2010-09-08
NANJING IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to propose a slag-making method for electric furnace smelting, which can solve the problem of severe slag boiling, premature slag flow, thinner slag, and lower slag volume during electric furnace blowing. Large, high total iron content in slag, high consumption of iron and steel material and serious corrosion of furnace lining, etc.

Method used

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Embodiment 1

[0017] The slag-making materials are bulk lime, bulk light-burned dolomite and bagged lime three kinds of slag-making auxiliary materials, plus a deoxidizing furnace protection agent; the bagged lime cloth is added to the electric furnace under the scrap steel at the same time as the scrap steel, and the bulk lime and bulk light Burned dolomite is fed into the electric furnace through the feeding system, and added to the upper part of the scrap steel. Deoxidation and furnace protection agent is a composite charge with deoxidation and furnace protection functions, the weight percentage of components: MgO: 53-70%, SiO 2 : 5~7%, C: 18~40%, CaO: 4~6%, Al 2 o 3 : 0 ~ 2%, used for deoxidation of molten steel in electric furnaces, while increasing the content of Mg-O in slag, reducing the consumption of magnesia carbon bricks and protecting the furnace lining.

[0018] The weight percent of bulk lime, bulk light-burned dolomite, bagged lime and deoxidation furnace protection agent ...

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Abstract

The invention relates to a slagging method of the field of metallurgy, in particular to a slagging method for electrosmelting. Slagging materials comprise three kinds of slagging assistant materials: bulk lime, bulk calcined dolomite and bagged lime, and a deoxidization furnace protective agent, wherein the bagged lime is distributed under waste steel and is added to an electrical furnace along with the waste steel; and the bulk lime and the bulk calcined dolomite are added to the electrical furnace by a charging system above the waste steel. The invention solves a series of problems of sparsity of electrosmelting slag, excessively high content of ferric oxide in the slag, high consumption of steel materials, serious furnace lining corrosion, substantial reduction of furnace age, sharp slag boiling in the early phase of blowing smelting, increase of slag quantity caused by a large quantity of flowing slag, high lime consumption and the like after the quantity of iron water is largely increased.

Description

technical field [0001] The invention relates to a slagging method in the field of metallurgy, in particular to a slagging method for electric furnace smelting. Background technique [0002] Since the cluster oxygen lance was put into use in the electric furnace factory, the oxygen supply capacity has been greatly improved, the smelting cycle has been greatly shortened, and the proportion of molten iron has also been greatly increased. Minutes per furnace is shortened to 42 minutes per furnace, basically reaching the design capacity of cluster oxygen lances. However, with the commissioning of the bloom continuous casting machine in the electric furnace factory, the successful double-station transformation of the vacuum furnace, and the successful technical transformation of the 2# refining furnace, the production process of the electric furnace has undergone tremendous changes. One electric furnace is matched with two refining furnaces and two continuous casting machines. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/54C21C7/06
CPCY02P40/40
Inventor 李德波
Owner NANJING IRON & STEEL CO LTD
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