Sintering mixture and application thereof

A technology for sintering mixtures and mixtures, applied in the field of sintering mixtures, which can solve the problems of reducing sintering production costs, agglomeration, clogging, etc., and achieve the effects of reducing workload, reducing production costs and increasing service life

Active Publication Date: 2014-03-26
SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above technical problems, the present invention provides a sintering mixture and a preparation method to solve

Method used

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  • Sintering mixture and application thereof
  • Sintering mixture and application thereof
  • Sintering mixture and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The mixture consists of the following components and parts by weight: 9 parts of quicklime, 1 part of dolomite, 4 parts of fuel, 81 parts of mixed ore powder, and 31 parts of returned ore; Quantity calculation, the weight ratio is coke powder: semi-coke = 7:3. Blue carbon has low heat generation. After adding Garland carbon, the temperature level in the high temperature area of ​​the combustion zone will drop, and the liquid phase will be insufficiently formed, resulting in a dark red layer on the section, which will easily cause the tail section to be irregular. Uneven; the upper part of the material layer has insufficient liquid phase formation and poor agglomeration; the lower layer has better agglomeration, larger pores in the material layer, and local over-melting phenomenon, so the blue-coke ratio should not be too high during production.

[0024] The proportion of semi-coke particle size ≤ 3mm is controlled at 70-75%, and the proportion of semi-coke particle siz...

Embodiment 2

[0028] The mixture is composed of the following components and parts by weight: 12 parts of quicklime, 3 parts of dolomite, 6 parts of fuel, 84 parts of mixed mineral powder, and 34 parts of returned ore; Quantity calculation, the weight ratio is coke powder: semi-coke = 9:1. The proportion of semi-coke particle size ≤ 3mm is controlled at 70-75%, and the proportion of semi-coke particle size ≥ 5mm is less than 5%.

[0029] Weigh the above components and mix them evenly before sintering in the sintering equipment. The sintering thickness is ≥700mm, the ignition temperature is increased to 1170-1200℃, the water content of the mixture is 7.2±0.2%, and the proportion of the mixture particle size>3mm is controlled to be ≥70%. Sinter basicity ≥ 2.3 ± 0.1.

Embodiment 3

[0031] The mixture is composed of the following components and parts by weight: 9 parts of quicklime, 3 parts of dolomite, 6 parts of fuel, 84 parts of mixed mineral powder, and 31 parts of returned ore; the fuel is composed of coke powder and semi-coke. Quantity calculation, the weight ratio is coke powder: semi-coke = 3:1. The proportion of semi-coke particle size ≤ 3mm is controlled at 70-75%, and the proportion of semi-coke particle size ≥ 5mm is less than 5%.

[0032] The above components are weighed, mixed evenly, and then sintered in the sintering equipment, the sintering thickness is ≥700mm, and the ignition temperature is raised to 1170-1200°C.

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Abstract

The invention belongs to the field of sintering mixtures and particularly relates to a sintering mixture and an application thereof. The sintering mixture is characterized by consisting of the following components in parts by weight: 9-12 parts of quick lime, 1-3 parts of dolomite, 4-6 parts of fuel, 81-84 parts of uniformly-mixed mineral powder and 31-34 parts of return fines, wherein the fuel consists of coke powder and semicoke, and the part ratio by weight of the coke powder to the semicoke to (7-9):(1-3) according to the total weight of the fuel. The thickness of a feed layer is more than or equal to 700mm, and the ignition temperature is 1170-1200 DEG C. According to the sintering mixture and the application thereof, the problems of caking, blockage and the like in electrostatic precipitation are solved, the sintering production cost is reduced, and therefore the purposes of improving the quality of sintering ore, saving energy and protecting environment are achieved.

Description

technical field [0001] The invention belongs to the field of sintering mixture, in particular to a sintering mixture and its application. Background technique [0002] Sintering belongs to a production process before blast furnace ironmaking and steelmaking production. Its purpose is to mix various powdery iron-containing raw materials with an appropriate amount of fuel and flux, add an appropriate amount of water, and mix and pelletize them on the sintering equipment. It is the process of sintering the material into a block through a series of physical and chemical changes. In production, the belt-type exhaust sintering machine is widely used to produce sinter. It mainly includes the preparation of sintered material, batching and mixing, sintering and product processing and other processes. The quality of the sintered parts after sintering directly affects the production and product quality of the subsequent ironmaking and steelmaking processes. [0003] The sintering q...

Claims

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Application Information

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IPC IPC(8): C22B1/16
Inventor 刘龙海麦吉昌廖远峰张成立向成功周平罗清明毛晓斌
Owner SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
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