Composite slagging agent for converter

A composite slagging agent and converter technology, applied in the manufacture of converters, etc., can solve the problems of slagging speed to be improved, high manufacturing cost, etc., and achieve high production efficiency, short slagging time, and reduced consumption of steel materials

Inactive Publication Date: 2013-03-20
高金菊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the slagging agent in this application is fluorine-free, its slagging speed needs to be improved, and its manufacturing cost is high, and metallurgical waste is not used as a resource.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A composite slagging agent for a converter in this embodiment has the following components in parts by mass: 68 parts of calcium-free chromium slag, 15 parts of white corundum, and 20 parts of limestone.

[0025] A kind of preparation method of composite slagging agent for converter of the present embodiment, its specific steps are:

[0026] (1) Weigh 68 parts of calcium-free chromium slag, 15 parts of white corundum, and 20 parts of limestone according to the mass ratio, and bake the above-mentioned calcium-free chromium slag, white corundum and limestone at a temperature of 150°C, and bake The time is 1.0 hours;

[0027] (2) Stir and mix the calcium-free chromium slag, white corundum and limestone baked in step (1);

[0028] (3) Premelt the mixture in step (2) at 1500°C for 2 hours;

[0029] (4) After cooling the pre-melted mixture in step (3), crush it into particles with a particle size of 1-5 cm to obtain a composite slagging agent for converters.

[0030] The c...

Embodiment 2

[0032] A composite slagging agent for a converter in this embodiment has the following components in parts by mass: 73 parts of calcium-free chromium slag, 12 parts of white corundum, and 23 parts of limestone.

[0033] A kind of preparation method of composite slagging agent for converter of the present embodiment, its specific steps are:

[0034] (1) Weigh 73 parts of calcium-free chromium slag, 12 parts of white corundum, and 23 parts of limestone according to the mass ratio, and bake the above-mentioned calcium-free chromium slag, white corundum and limestone at a temperature of 110°C, and bake The time is 1.0 hours;

[0035] (2) Stir and mix the calcium-free chromium slag, white corundum and limestone baked in step (1);

[0036] (3) Premelt the mixture in step (2) at 1700°C for 1 hour;

[0037] (4) After cooling the pre-melted mixture in step (3), crush it into particles with a particle size of 1-5 cm to obtain a composite slagging agent for converters.

[0038] The co...

Embodiment 3

[0040] A composite slagging agent for a converter in this embodiment has the following components in parts by mass: 71 parts of calcium-free chromium slag, 13 parts of white corundum, and 21 parts of limestone.

[0041] A kind of preparation method of composite slagging agent for converter of the present embodiment, its specific steps are:

[0042] (1) Weigh 71 parts of calcium-free chromium slag, 13 parts of white corundum, and 21 parts of limestone according to the mass ratio, and bake the above-mentioned calcium-free chromium slag, white corundum and limestone separately at a temperature of 140 °C. The time is 1.0 hours;

[0043] (2) Stir and mix the calcium-free chromium slag, white corundum and limestone baked in step (1);

[0044] (3) Pre-melt the mixture in step (2) at 1600°C for 1.5 hours;

[0045] (4) After cooling the pre-melted mixture in step (3), crush it into particles with a particle size of 1-5 cm to obtain a composite slagging agent for converters.

[0046]...

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Abstract

The invention discloses a composite slagging agent for a converter, which belongs to the technical field of slagging agents used in a converter steel-making process. The composite slagging agent comprises, by mass, 68 to 73 parts of calcium-free chromium slag, 12 to 15 parts of white corundum and 20 to 23 parts of limestone. The composite slagging agent for the converter provided by the invention does not contain CaF2, enables pollution to the atmosphere and the water resource by fluorine-containing gas and fluorinions to be avoided and integratedly utilizes waste calcium-free chromium slag which is difficult to recycle as a main raw material, so production cost for the slagging agent is substantially reduced, and elements like Cr and Fe in the calcium-free chromium slag are comprehensively utilized. According to the invention, formation time of the composite slagging agent is short and is reduced by about 30%, high production efficiency is realized, steel consumption is reduced by more than 3 Kg / t, consumption of slagging materials is reduced, and a substantial economic benefit is obtained.

Description

technical field [0001] The invention relates to the technical field of slag-forming agents in converter steelmaking processes, and more specifically relates to a composite slag-forming agent for converters. Background technique [0002] Slagging is an essential part of the steelmaking and ironmaking process. Steelmaking and ironmaking need to reduce the impurities in the steel. These impurities are separated and enter the slag. Because the slag has a light specific gravity and floats on the molten steel, it is easier to remove. In addition, the slag can also protect the molten steel from direct contact with the atmosphere. Slagging is the addition of steelmaking substances called slagging agents, such as calcium fluoride or calcium oxide, during the steelmaking process to form slag. [0003] It can be seen that converter slagging is the key operation of converter smelting, and rapid slagging is the core content of converter slagging. The use of slagging agent is an import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C21C5/36
Inventor 高金菊
Owner 高金菊
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