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Method of reducing iron consumption for semi-steel smelting

A technology for steel smelting and iron consumption, applied in the field of reducing iron consumption in semi-steel smelting, can solve the problems of chemical heat loss, large burning loss of exothermic elements carbon and manganese, difficulty in heating up and eating more scrap steel, etc., to reduce consumption, increase production capacity, increase The effect of adding amount

Inactive Publication Date: 2019-01-11
SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with conventional molten iron, semi-steel has greater burning loss of heating elements carbon, silicon and manganese, and greater loss of chemical heat in converter smelting
It has brought certain difficulties to the temperature rise of converter smelting, slag removal, and eating more scrap steel

Method used

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  • Method of reducing iron consumption for semi-steel smelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) the semi-steel ladle that completes vanadium extraction to semi-steel smelting a cycle production cycle is placed on the semi-steel car;

[0031] (2) Add scrap steel bars with a diameter of ≤25mm and a length of 500-700mm into the semi-steel ladle with an electromagnetic crane. The amount of scrap steel bars added is 500Kg / semi-steel ladle, and the surplus heat brought by the entry and exit of the semi-steel in the semi-steel ladle is used for preheating Add scrap steel bar 3 in the half ladle;

[0032] (3) semi-steel car operation transports the semi-steel ladle of above-mentioned step (2) to the vanadium extracting converter, and the vanadium extracting converter is turned over and 8Ot semi-steel is blended into the semi-steel ladle of the above-mentioned step (2), and the steel scrap in the semi-steel ladle Melting with the impact and high temperature of semi-steel;

[0033] (4) Hoist the semi-steel ladle in the above step (3) above the semi-steel furnace by dri...

Embodiment 2

[0036] (1) the semi-steel ladle that completes vanadium extraction to semi-steel smelting a cycle production cycle is placed on the semi-steel car;

[0037] (2) Add scrap steel bars with a diameter of ≤25mm and a length of 500-700mm into the semi-steel ladle with an electromagnetic crane. The amount of scrap steel bars added is 600Kg / semi-steel ladle, and the surplus heat brought by the entry and exit of the semi-steel in the semi-steel ladle is used for preheating Add scrap steel bar 3 in the half ladle;

[0038] (3) semi-steel car operation transports the semi-steel ladle of above-mentioned step (2) to the vanadium extracting converter, and the vanadium extracting converter is turned over and 8Ot semi-steel is blended into the semi-steel ladle of the above-mentioned step (2), and the steel scrap in the semi-steel ladle Melting with the impact and high temperature of semi-steel;

[0039] (4) After 3 minutes, use the driving to lift the semi-steel ladle of the above step (3) ...

Embodiment 3

[0042] (1) the semi-steel ladle that completes vanadium extraction to semi-steel smelting a cycle production cycle is placed on the semi-steel car;

[0043] (2) Add scrap steel bars with a diameter of ≤25mm and a length of 500-700mm into the semi-steel ladle with an electromagnetic crane. The amount of scrap steel bars added is 700Kg / semi-steel ladle, and the surplus heat brought by the entry and exit of the semi-steel in the semi-steel ladle is used for preheating Add scrap steel bar 3 in the half ladle;

[0044] (3) semi-steel car operation transports the semi-steel ladle of above-mentioned step (2) to the vanadium extracting converter, and the vanadium extracting converter is turned over and 8Ot semi-steel is blended into the semi-steel ladle of the above-mentioned step (2), and the steel scrap in the semi-steel ladle Melting with the impact and high temperature of semi-steel;

[0045] (4) After 5 minutes, hoist the semi-steel ladle of the above step (3) above the semi-ste...

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Abstract

The invention discloses a method of reducing iron consumption for semi-steel smelting. The method comprises the following steps that (1), a semi-steel ladle which has completed vanadium extracting tosemi-steel smelting for one-cycle production period is placed on a semi-steel vehicle; (2), a waste steel bar is added into the semi-steel ladle; (3), semi-steel in a vanadium extraction converter isadded into the semi-steel ladle in the step (2); and (4), the substance of the semi-steel ladle in the step (3) is poured into a semi-steel furnace for smelting. According to the method, the process of an original production technology is not changed, the original production mode is not affected, equipment does not need to be added, only at the production interval time, the waste steel bar is preheated by utilizing the surplus temperature of the semi-steel ladle, and then the waste steel bar is melted by utilizing the impact force of the semi-steel and the high temperature. Through the summaryby an inventor on production and practice, the semi-steel smelting method provided by the invention is adopted, every semi-steel furnace can use extra about 0. 7 tons of waste steel compared with before and produce about 7 kilotons of steel per year, and basing on 4300 Yuan / ton to calculate, the economic benefit can be increased by 30,000,000 Yuan / year.

Description

technical field [0001] The invention relates to a method for reducing iron consumption in semi-steel smelting, belonging to the technical field of metallurgy. Background technique [0002] my country's vanadium-titanium magnetite deposits are widely distributed and rich in reserves. The reserves and mining volume rank third in the country's iron ore. Vanadium-titanium magnetite is not only an important source of iron, but also associated vanadium, titanium, chromium, cobalt, nickel, and platinum. And scandium and other components, with high comprehensive utilization value. Fe, V, and Ti in vanadium-titanium magnetite exist and distribute in the form of isomorphism, which cannot be enriched and separated by physical separation. Generally, it is necessary to produce vanadium slag by molten iron blowing vanadium. That is, the vanadium-titanium magnetite ore dressing concentrate is smelted in a blast furnace or an electric furnace to obtain vanadium-containing pig iron water, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28
CPCC21C5/28C21C5/565
Inventor 何斌胡友波冉顶立高华斌
Owner SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
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