Special binding agent for converter dedusting ash cold-pressed pellets

A converter technology for dust removal and cold-pressing pellets, applied in the field of smelting, can solve problems such as insufficient strength and pulverization, and achieve the effects of reducing the pulverization rate, increasing the strength, and improving the utilization rate

Inactive Publication Date: 2018-06-01
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem of insufficient strength or pulverization of the cold-pressed pellets of the converter dedusting ash after consolidation (drying), improves the strength of the cold-pressed pellets of the converter dedusting ash, and then improves the pelletizing rate of the converter dedusting ash

Method used

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  • Special binding agent for converter dedusting ash cold-pressed pellets
  • Special binding agent for converter dedusting ash cold-pressed pellets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The binder in the present embodiment is weighed by weight ratio: 1 part of syrup, 15 parts of ammonium carbonate and 2 parts of sodium carboxymethyl cellulose. When in use, mix ammonium carbonate and sodium carboxymethyl cellulose according to Add the required proportion to the converter dust removal ash, and then take the syrup according to the proportion and add it to the converter dust removal ash, spray 6% water and mix well, press it into a ball with a jack, and test the falling strength of the pellet after solidifying in the air for 24 hours , compressive strength and pulverization rate, the test method is as follows:

[0031] Drop strength: Randomly select 10 pellets, each of which falls freely from a height of 2m onto a steel plate with a thickness of 10cm, counts the number of times when it breaks as the drop strength of the pellet, and finally calculates the average value as the group of pellets drop strength index.

[0032] For compressive strength, 10 pelle...

Embodiment 2

[0042]The binding agent in the present embodiment, carry out by weight ratio: 0.6 part of syrup, 20 parts of ammonium carbonate and 1.4 parts of sodium carboxymethyl cellulose, add the binding agent that weight ratio is 3% in converter dedusting ash, namely 97 parts by weight of converter dust and 3 parts by weight of binder, wherein 0.082 parts by weight of syrup, 2.727 parts by weight of ammonium carbonate, and 0.191 parts by weight of sodium carboxymethyl cellulose can be added respectively in the binder, or can be added after mixing 97 parts by weight of the converter dust, after that, sprayed with different amounts of water, mixed evenly, pressed into balls with a jack, consolidated in the air for 24 hours, measured with the method in Example 1. Wherein, the amount of water added is calculated according to the weight percentage of the total amount of converter dust and binder.

[0043] The results show that with the increase of the amount of water added, such as from 4% t...

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Abstract

The invention relates to a special binding agent for converter dedusting ash cold-pressed pellets. The special binding agent comprises the following components including, by weight, 0.1-1.5 parts of syrup, 8-22 parts of carbonate, and 0.5-2.5 parts of sodium carboxymethylcellulose. When the special binding agent is used for preparing the cold-pressed pellets by converter dedusting ash, the strength of the converter dedusting ash cold-pressed pellets can be effectively improved, the pulverization rate is reduced, the utilization rate of the converter dedusting ash is fully increased, and the environmental pollution is reduced.

Description

technical field [0001] The invention belongs to the technical field of smelting, and in particular relates to a special binder for cold-pressed pellets of converter dedusting ash. Background technique [0002] In recent years, the price of imported iron ore has soared, which has directly led to a substantial increase in the cost of importing iron ore in my country, which in turn has caused a linkage increase in domestic iron ore prices, energy prices, and even consumer goods prices. This has not only seriously affected my country's steel industry , It also poses a huge threat to the healthy and sustainable development of the national economy. Converter dust is a recyclable secondary resource produced in the steel production process. Converter dust generally refers to the fine dust obtained from the flue gas produced in the blowing process of the converter after dry dust removal. It has the characteristics of high iron content, fine particle size, and large specific surface a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/242C22B1/248
CPCC22B1/242C22B1/248
Inventor 丁学勇王博居天华唐昭辉董越刘程宏杜红兵
Owner NORTHEASTERN UNIV LIAONING
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