A kind of dust removal ash cold briquette and its preparation method and application

A converter dedusting and ash cooling technology, which is applied in the direction of manufacturing converters and improving process efficiency, can solve the problems of low utilization rate of dedusting ash, low pellet strength, secondary pollution, etc., and achieve increased refining efficiency and pulverization The effect of low efficiency and reduction of raw material cost

Active Publication Date: 2021-03-23
河北蓝海智投环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low strength, high pulverization rate, low utilization rate of dedusting ash and easy secondary pollution of the existing pellets for remelting made by converter dedusting ash, the present invention provides a dedusting ash cold briquette and its preparation Methods and Applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]A cold briquette of dedusting ash, consisting of the following components in parts by mass:

[0040] 70 parts of converter dust, 10 parts of iron oxide scale, 10 parts of smelting waste residue and 4 parts of adhesive. Wherein, the adhesive is composed of the following components in parts by mass: 8 parts of calcium silicate, 2 parts of magnesium silicate, 1 part of calcium oxide, 1 part of magnesium oxide and 1 part of aluminum oxide; The composition of fine ash and sludge is 4.5:1; the fine ash is the dust ash collected by dry dust removal in the process of converter smelting; the sludge is the sludge obtained by wet dust removal in the process of converter smelting, and the water in the sludge The mass content is 23%; the smelting waste slag is steel slag with a particle size of 5-10mm and an iron content of 31%; the cold briquette of dedusting ash is a rectangular brick with a size of 240mm×115mm×53mm.

[0041] The preparation method of the dedusting ash cold brique...

Embodiment 2

[0046] A cold briquette of dedusting ash, consisting of the following components in parts by mass:

[0047] 70 parts of converter dust, 10 parts of iron scale, 10 parts of smelting waste residue, 2 parts of red iron oxide, 0.2 part of modified polycarboxylate XT-2000, 0.1 part of boric acid and 4 parts of adhesive. Wherein, the adhesive is composed of the following components in parts by mass: 8 parts of calcium silicate, 2 parts of magnesium silicate, 1 part of calcium oxide, 1 part of magnesium oxide and 1 part of aluminum oxide; The composition of fine ash and sludge is 4.5:1; the fine ash is the dust ash collected by dry dust removal in the process of converter smelting; the sludge is the sludge obtained by wet dust removal in the process of converter smelting, and the water in the sludge The mass content is 23%; the smelting waste slag is steel slag with a particle size of 5-10mm and an iron content of 31%; the cold briquette of dedusting ash is a rectangular brick with a...

Embodiment 3

[0053] A cold briquette of dedusting ash, consisting of the following components in parts by mass:

[0054] 75 parts of converter dust, 12 parts of iron scale, 15 parts of smelting waste residue, 4 parts of red iron oxide, 0.3 part of modified polycarboxylate XT-2000, 0.2 part of boric acid and 5 parts of adhesive. Wherein, the adhesive is composed of the following components in parts by mass: 9 parts of calcium silicate, 2.5 parts of magnesium silicate, 1.5 parts of calcium oxide, 1.5 parts of magnesium oxide and 1.5 parts of aluminum oxide; The composition of fine ash and sludge is 5:1; the fine ash is the dust collected by dry dust removal in the process of converter smelting; the sludge is the sludge obtained by wet dust removal in the process of converter smelting, and the water in the sludge The mass content is 23%; the smelting waste slag is steel slag with a particle size of 5-10mm and an iron content of 31%; the cold briquette of dedusting ash is a rectangular brick w...

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Abstract

The invention relates to the technical field of steelmaking waste resource utilization, and particularly discloses a fly ash cold pressing block and a preparation method and application thereof. The fly ash cold pressing block is prepared from the following components in parts by mass: 70-80 parts of converter fly ash, 10-15 parts of iron oxide scale, 10-20 parts of smelting waste slag and 4-6 parts of an adhesive. The fly ash cold pressing block can be prepared by a static pressure method or a vibration pressure method, and can be used as a slag former, a fluxing agent, an oxidizing agent, acooling agent, a desulfurizing agent and a dephosphorizing agent for converter steelmaking. The fly ash cold pressing block has the characteristics of high molding rate, high density and strength, lowadhesive consumption, low differentiation rate and no need of steam curing or other curing processes in the pressing process.

Description

technical field [0001] The invention relates to the technical field of resource utilization of steelmaking waste, in particular to a cold briquette of dedusting ash and its preparation method and application. Background technique [0002] With the rapid development of my country's metallurgical industry, more and more people pay more and more attention to the impact of dust generated in the production process of iron and steel enterprises on the environment. Especially in the process of converter smelting, a large amount of dust will be generated. For these dusts, two methods are generally used to deal with them. One is wet dust removal, which produces iron-containing dust sludge, also known as sludge; the other is The first is dry dust removal, and the final product is dust removal coarse ash and fine ash. Due to the stronger ability of dry dust removal to control fine dust, and the converter dust collected by dry method is a good metallurgical secondary resource, the TFe ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/36C21C7/00C21C7/064C21C1/02
CPCC21C1/025C21C5/36C21C7/00C21C7/0645Y02P10/20
Inventor 任张叶萱谢立军张志琼乔岚
Owner 河北蓝海智投环保科技有限公司
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