Long-service-life furnace burden matching method

A long-life, charge technology, applied in furnaces, blast furnaces, blast furnace details, etc., can solve problems that endanger the safety of blast furnace production, high heat flow intensity, hearth burn-through, etc., to achieve increased rigidity, improved high temperature resistance, and comprehensive ingredients Effect

Inactive Publication Date: 2016-01-20
TIANJIN ZHONGDA PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ultra-high heat flow intensity seriously endangers the safe production of the blast furnace, and with the prolongation of the use time, dangerous accidents of hearth burn-through may occur at any time, and the furnace can only be shut down for repair

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1 A kind of long-life charge proportioning, its component and parts by weight are as follows:

[0017] Component name

[0018] The preparation method provided in this example is described as follows: First, weigh 20 kilograms of pig iron, 50 kilograms of steel scrap, 8 kilograms of recycled materials, and 15 kilograms of ferrosilicon according to the above-mentioned proportions, first fully mix and stir them, and put them into a pulverizer after they are uniform Grinding and pulverizing through a 100-mesh sieve, then melting the mixture to obtain molten iron, and then passing through a high temperature of 1300 ° C, and then weighing 0.1 kg of vanadium-titanium material, 0.1 kg of recarburizer, 4 kg of graphite balls, and 8 kg of chromium oxide. After grinding, continue Heating and stirring for 2 hours, completely dissolving and mixing, and then quickly releasing from the furnace to obtain a long-life charge ratio mixture.

Embodiment 2

[0019] Embodiment 2 A kind of long-life charge proportioning, its component and parts by weight are as follows:

[0020] Component name

[0021] The preparation method provided in this example is described as follows: First, weigh 30 kilograms of pig iron, 70 kilograms of scrap steel, 12 kilograms of recycled materials, and 30 kilograms of ferrosilicon according to the above proportions, first fully mix and stir them, and put them into a pulverizer after they are uniform Grinding and pulverizing through a 100-mesh sieve, then melting the mixture to obtain molten iron, and then passing through a high temperature of 1300 ° C, and then weighing 0.5 kg of vanadium-titanium material, 0.3 kg of recarburizer, 15 kg of graphite balls, and 12 kg of chromium oxide. After grinding, continue Heating and stirring for 2 hours, completely dissolving and mixing, and then quickly releasing from the furnace to obtain a long-life charge ratio mixture.

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PUM

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Abstract

The invention provides a long-service-life furnace burden matching method. The method is characterized in that all raw material components comprise, by weight, 20 to 30 parts of pig iron, 50 to 70 parts of scrap steel, 8 to 12 parts of foundry returns, 15 to 30 parts of silicon iron, 0.1 to 0.5 parts of a vanadium-titanium material, 0.1 to 0.3 part of carburant, 4 to 15 parts of graphite nodules and 8 to 12 parts of chromic oxide. By the adoption of the method, the materials are prepared comprehensively and matched reasonably, a microstructure made of the mixed and fused synthetic materials is high in degree of sphericity and large in grain size, the impurity content is small after screening operation, the high-temperature resistance of a blast furnace can be improved, and the tenacity and the stress intensity of the materials are high; due to the addition of a small amount of chrome, the rigidity and harness of the materials can be effectively improved, and the service life of the materials is prolonged; and due to the addition of the vanadium-titanium material, the furnace protecting and fettling effects are achieved, the use performance of the materials is further improved, and the service life of the furnace is prolonged.

Description

technical field [0001] The invention relates to a charge ratio, in particular to a long-life metal charge ratio. Background technique [0002] Blast furnace life is one of the important indicators of blast furnace production. At present, many domestic metallurgical furnaces are plagued by greatly shortened furnace life. The ultra-high heat flow intensity seriously endangers the safe production of the blast furnace, and with the prolongation of the use time, dangerous accidents of hearth burn-through may occur at any time, and the furnace can only be shut down for repair. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a long-life charge ratio. [0004] The technical solution adopted by the present invention: a long-life charge proportioning, characterized in that, its raw material components and parts by weight are as follows: [0005] Pig iron: 20-30 parts; [0006] Scrap steel: 50-70 parts; [0007] Re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
CPCY02P10/20
Inventor 李树军史鹏博孙士俊史东亮
Owner TIANJIN ZHONGDA PRECISION MACHINERY
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