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Converter composite exothermic agent and preparation method

A heating agent and converter technology, which is applied in the direction of chemical instruments and methods, manufacturing converters, heat exchange materials, etc., can solve the problems of reducing heat loss and large differences in the non-heating effect of carbonaceous heating agents, etc.

Active Publication Date: 2021-06-22
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In summary, the existing converter heating agent invention technology aims at the shortcomings of early carbon heating agents, silicon heating agents, and aluminum heating agents, and has developed composite materials with different combinations of heating elements to compensate for the heating of a single heating element material. The adverse effects of additives on converter smelting, especially the application of industrial solid waste industrial silicon powder and AD powder raw materials, compared with homogeneous silicon-aluminum heating agents, the cost of heating agents is significantly reduced, but how to control metal silicon and metal The fluctuation of aluminum composition and its oxidation heat release rate become the key factors affecting the quality of exothermic agents, and relevant patents and materials have not been reported; in addition, for carbonaceous composite exothermic agents, graphite powder, electrode powder, coke powder, etc. The heat transfer efficiency of combustion and molten steel heating is the key factor affecting its heating effect, which is also the main reason for the large difference in the non-heating effect of carbonaceous heating agents among different enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The raw materials of converter compound heating agent include heat replenishing agent, regulator, catalyst, weighting agent, heat increasing agent and binder, and the mass percentage of each component is: heat replenishing agent 50%, regulator 15%, catalyst 3%, Weighting agent 18%, heating agent 10%, binder 4%.

[0032] The heat replenishing agent is composed of waste graphite electrode powder and biochar powder; the regulator is composed of active lime powder and light-burned dolomite powder according to the mass ratio of 2:1; the catalyst is composed of pyrolusite powder with a particle size of ≤0.150mm; The weighting agent is steel grain, the particle size is ≤5mm, and the mass percentage of TFe is ≥85%. The mass ratio of cutting tertiary sand and secondary aluminum ash is 4:1; the binder is phenolic resin.

[0033] Biochar powder is a biochar powder prepared by high-temperature pyrolysis of agricultural and forestry biomass resources in a low-oxygen environment, wh...

Embodiment 2

[0035]The raw materials of converter compound heating agent include heat replenishing agent, regulator, catalyst, weighting agent, heat increasing agent and binder, and the mass percentage of each component is: heat replenishing agent 55%, regulator 15%, catalyst 2%, 17% weighting agent, 8% heating agent, 3% binding agent, and the heating agent is composed of biological charcoal powder and blue charcoal powder. Others are the same as in Example 1.

Embodiment 3

[0037] The raw materials of converter compound heating agent include heat replenishing agent, regulator, catalyst, weighting agent, heat increasing agent and binder, and the mass percentage of each component is: heat replenishing agent 60%, regulator 10%, catalyst 1%, Weighting agent 18%, heating agent 8%, binder 3%. The heat replenishing agent is composed of waste graphite electrode powder and blue carbon powder; the binder is composed of phenolic resin and coal tar. Others are the same as in Example 1.

[0038] Embodiment 1~embodiment 3 all adopt the method for following steps to prepare:

[0039] 1) Taking corresponding raw materials according to raw material composition and mass ratio for subsequent use;

[0040] 2) Put the weighed raw materials into the wheel mill mixer and mix for 15 to 30 minutes, and then let the material stand for 1 to 3 hours after discharging to obtain the converter compound heating agent roller mill mixture;

[0041] 3) Add the obtained roll-mil...

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Abstract

The invention discloses a converter composite exothermic agent and a preparation method. The converter composite exothermic agent comprises the following raw materials in percentage by mass of 50-60% of a heat supplementing agent, 10-15% of a regulator, 1-3% of a catalyst, 10-20% of a weighting agent, 5-10% of a heat increasing agent and 2-4% of a binding agent. By optimizing the raw materials of the converter composite exothermic agent and the mass percent thereof, the converter composite exothermic agent has the characteristics of stable oxygen-blowing combustion, high heat supplementing efficiency, low cost, convenience in preparation and the like, and finally, the purpose of high-efficiency and low-cost smelting of a converter with a large scrap steel ratio is achieved. Through optimization of process parameters in the preparation method, the consistency of the quality reliability of a heating agent pressing ball and the in-furnace heat compensation effect is ensured.

Description

technical field [0001] The invention belongs to the technical field of converter steelmaking, and in particular relates to a converter composite heating agent and a preparation method thereof. Background technique [0002] With the rapid development of my country's iron and steel industry, iron ore consumption has risen sharply, leading to increasingly tight domestic iron ore resources and a large amount of iron ore imports, and the rising price of ore has seriously restricted the production and operation benefits of iron and steel complexes; at the same time, Blast furnace ironmaking with high pollution and high energy consumption is also not conducive to the national low-carbon green development strategy, restricting the release and further improvement of blast furnace ironmaking capacity. For integrated iron and steel enterprises, how to reduce the ratio of molten iron in the converter and increase the ratio of scrap steel has become an urgent need for low-carbon and green...

Claims

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Application Information

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IPC IPC(8): C21C7/00C21C5/28C09K5/18
CPCC21C7/005C21C5/28C09K5/18Y02P10/20Y02P20/10
Inventor 欧阳德刚孙伟周甫肖邦志沈继胜朱万军
Owner 武汉钢铁有限公司
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