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New technology for preparing converter slag-regulating reagent by light-burning dolomite powder ash

A light-burned dolomite and slagging agent technology, which is applied in the field of converter slag adjusting agent, can solve the problems of light-burned dolomite powder ash not being able to fully utilize the environment and damage, and achieve the effects of low cost, avoiding environmental damage, and good strength in the later stage

Inactive Publication Date: 2014-05-14
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem in the prior art that light-burned dolomite powder ash cannot be fully utilized and will cause environmental damage, the purpose of this invention is to provide a new process for preparing converter slagging agent by using light-burned dolomite powder ash

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: A new process for preparing converter slagging agent by using lightly burned dolomite powder ash, comprising the following steps:

[0020] 1) Screen the light-burned dolomite powder ash, send the part larger than 5mm to the storage yard for direct use in converter smelting, and crush the part larger than 3mm and smaller than 5mm to obtain light-burned dolomite powder ash with a particle size of less than 3mm;

[0021] 2) Crush the lightly burned dolomite powder ash with a particle size greater than 3mm and less than 5mm in step 1), until all of it passes through a 3mm sieve, and the underscreen is transported to the powder storage bin

[0022] 3) The light-burned dolomite powder ash less than 3 mm in the powder storage yard in step 2) is pelletized in a disc pelletizer at a speed of 25 rpm to obtain light-burned dolomite pellets A; , the weight ratio of burnt dolomite powder ash, industrial syrup, quicklime and water is 1000:15:5:25;

[0023] 4) Send the li...

Embodiment example 2

[0024] Implementation case 2: A new process for preparing converter slagging agent by using lightly burned dolomite powder ash, comprising the following steps:

[0025] 1) Screen the light-burned dolomite powder ash, send the part larger than 5mm to the storage yard for direct use in converter smelting, and crush the part larger than 3mm and smaller than 5mm to obtain light-burned dolomite powder ash with a particle size of less than 3mm;

[0026] 2) Crushing light-burned dolomite powder ash with a particle size greater than 3mm and less than 5mm in step 1), until all of them pass through a 3mm sieve, and the under-sieve is transported to the powder storage bin;

[0027] 3) The light-burned dolomite powder ash less than 3 mm in the powder storage yard in step 2) is pelletized in a disc pelletizer at a speed of 25 rpm to obtain light-burned dolomite pellets B; , the weight ratio of lightly burned dolomite powder ash, industrial syrup, quicklime and water is 1100:15:5:25;

[...

Embodiment example 3

[0029] Implementation Case 3 A kind of new technology that utilizes lightly burned dolomite powder ash to prepare converter slagging agent, comprises the following steps:

[0030] 1) Screen the light-burned dolomite powder ash, send the part larger than 5mm to the storage yard for direct use in converter smelting, and crush the part larger than 3mm and smaller than 5mm to obtain light-burned dolomite powder ash with a particle size of less than 3mm;

[0031] 2) Crush the lightly burned dolomite powder ash with a particle size greater than 3mm and less than 5mm in step 1), until all of it passes through a 3mm sieve, and the underscreen is transported to the powder storage bin

[0032] 3) The light-burned dolomite powder ash less than 3mm in the powder storage yard in step 2) is pelletized in a disc pelletizer at a speed of 25 rpm to obtain light-burned dolomite pellets C; , the weight ratio of burned dolomite powder ash, industrial syrup, quicklime and water is 1200:15:5:25; ...

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Abstract

The invention provides a new technology for preparing converter slag-regulating reagent by light-burning dolomite powder ash, which comprises the following steps of: carrying out particle size sieving on calcined dolomite; directly sending light-burning dolomite blocks of which the diameter is more than 5mm into a steel mill to be used; sieving the light-burning dolomite blocks of which the diameter is less than 5mm to a certain degree; crushing the light-burning dolomite blocks of which the diameter is more than 3mm to ensure that the particle size of the light-burning dolomite is less than 3mm; blending and adding certain binding agent and water into the light-burning dolomite powder ash of which the particle size is less than 3mm; pelletizing in a disc balling machine to obtain a light-burning dolomite pellet of which the particle size is more than 15mm; and after the pellet is conserved to meet a converter slag-regulating reagent requirement, sending the pellet to the steel mill to replace the light-burning dolomite block for use. According to the new technology disclosed by the invention, the light-burning dolomite powder ash is pelletized by adding a certain quantity of bonding agent and a proper quantity of water, and the technology is simple. In addition, due to the fact that the iron and steel enterprise has an abundant pellet production experience, the new technology is favorable for the high-value utilization of the light-burning dolomite powder ash, and has important meanings on energy saving, emission reduction and resource utilization of the iron and steel industry.

Description

technical field [0001] The invention belongs to the field of resource environmental protection, and in particular relates to a method for a converter slagging agent prepared by using lightly burned dolomite powder ash. Background technique [0002] The slag splashing furnace protection technology plays a very important role in the protection of the converter and the improvement of the life of the converter. In the slag splashing furnace protection technology, it is the slag adjusting agent that plays a key factor. At present, the slag adjusting agents commonly used in steel mills mainly include: lightly burned dolomite, lightly burned magnesia balls, and metallurgical magnesia. Choosing a suitable slag adjusting agent is the key to ensure the effect of slag splashing to protect the furnace and improve the comprehensive economic benefits of slag splashing. Lightly burned dolomite is the most suitable slag adjusting agent for slag splashing and furnace protection. Moreover, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/36
CPCY02P10/20
Inventor 刘清才兰苑培杨剑刘浪丁健吴国防杨进张洋滨徐晶朱博洪孔明
Owner CHONGQING UNIV
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