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A kind of hot metal desulfurizer and preparation method thereof

A technology of desulfurizing agent and passivating agent, which is applied in the field of molten iron desulfurizing agent and its preparation, can solve the problems of wasting lime resources, prolonging pulverization time, and short storage time, so as to prevent environmental pollution and waste of lime resources, suppress The degree of volatility and the effect of shortening the desulfurization cycle

Inactive Publication Date: 2016-01-06
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

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art that the desulfurizer is easy to pulverize, have short storage time, pollute the environment, and waste lime resources, and provide a desulfurizer whose storage time is extended from no more than 2 weeks to no less than 2 weeks In 1 month, the pulverization time is greatly extended, the desulfurization effect is guaranteed, and the desulfurization agent preparation method saves the amount of desulfurization agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of preparation method of desulfurizer, its step:

[0018] 1) Passivation treatment of slaked lime with a particle size of 0.5~1.5mm;

[0019] ①Spray the passivator containing hydrogen silicone oil on the surface of slaked lime in the container, the ratio of passivator to slaked lime is 5:95, and spray and mix evenly while spraying;

[0020] ② After the spraying is finished, cover the container with a sealed cover, and rotate the container while heating; the container is heated to 100~105 0 C;

[0021] ③Insulation: at 100~105 0 Keep it warm for 4 minutes at C temperature to make the passivating agent boil and completely volatilize and be absorbed by slaked lime to form a protective film;

[0022] ④ Stop heat preservation, let the container stand still and cool down to room temperature naturally;

[0023] 2) Mix the fluorite with a particle size of 0.5~1.5mm and the hydrated lime after passivation treatment until uniform: the hydrated lime and fluorite after pa...

Embodiment 2

[0027] A kind of preparation method of desulfurizer, its step:

[0028] 1) Passivation treatment of slaked lime with a particle size of 0.5~1.5mm;

[0029] ①Spray the passivator containing hydrogen silicone oil on the surface of slaked lime in the container, the ratio of passivator to slaked lime is 6:94, and spray and mix evenly while spraying;

[0030] ②After the spraying is finished, cover the container with a sealed cover, and rotate the container while heating; the container is heated to 110~115 0 C;

[0031] ③Insulation: at 110~115 0 Keep it warm for 3.5 minutes at C temperature to make the passivating agent boil and completely volatilize and be absorbed by slaked lime to form a protective film;

[0032] ④ Stop heat preservation, let the container stand still and cool down to room temperature naturally;

[0033] 2) Mix the fluorite with a particle size of 0.5~1.5mm and the hydrated lime after passivation treatment until uniform: the hydrated lime and fluorite after p...

Embodiment 3

[0037] A kind of preparation method of desulfurizer, its step:

[0038] 1) Passivation treatment of slaked lime with a particle size of 0.5~1.5mm;

[0039] ①Spray the passivator containing hydrogen silicone oil on the surface of the slaked lime in the container, the ratio of the passivator to the slaked lime is 8:92, and spray and mix evenly by rotating while spraying;

[0040] ②After the spraying is finished, cover the container with the sealing cap, and rotate the container while heating; the container is heated to 113~118 0 C;

[0041] ③Insulation: at 113~118 0 Insulate at C temperature for 2.5 minutes to make the passivating agent boil and completely volatilize and be absorbed by slaked lime to form a protective film;

[0042] ④ Stop heat preservation, let the container stand still and cool down to room temperature naturally;

[0043] 2) Mix the fluorite with a particle size of 0.5~1.5mm and the hydrated lime after passivation treatment until uniform: the hydrated lime...

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Abstract

The invention discloses a preparation method of a molten iron desulfurizing agent. The preparation method comprises the steps of passivating hydrated lime; mixing fluorite with the passivated hydrated lime uniformly, and mixing the passivated lime with the fluorite in a ratio of (88-90):(10-12); filling the mixture into a moistureproof container or bag, and sealing the container or the bag for later use. Because a passivating agent containing hydrogen silicone oil is sprayed on the surface of the hydrated lime, and the hydrated lime is passivated by heating and the like to ensure that a layer of a protective film is formed on the surface of the hydrated lime and then the volatilization degree of the hydrated lime is effectively inhibited, so that the storage time of the desulfurizing agent is prolonged to 1-2 months from 1-2 weeks, and the environment pollution and the waste of lime resources during refilling are prevented; the unit consumption of the desulfurizing agent is reduced by over 8% compared with an original desulfurizing agent, and the desulfurizing period is shortened.

Description

technical field [0001] The invention relates to a production method of purified material for steelmaking, in particular to a preparation method of a desulfurizing agent used in molten iron desulfurization pretreatment. Background technique [0002] In the steelmaking production process, hot metal pretreatment desulfurization is a necessary link in the production of high-quality low-sulfur steel. At present, the desulfurization methods mainly include injection method and mechanical stirring method (namely KR method), and what the present invention relates to is KR method. Because lime (mainly composed of calcium oxide CaO) is abundant and cheap, lime (calcium oxide) is generally used as a desulfurizer in the KR method. The particle size of the desulfurizer is 0.5-1.5mm, and it needs to be fresh and dry. As we all know, calcium oxide is easy to absorb moisture and pulverize, especially in humid or rainy weather conditions, its pulverization rate can increase from 10% to 30% ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064
Inventor 邓品团丁金发陶胜心赵可力殷享兵王安军李胜超徐诚澄
Owner 武汉钢铁有限公司
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