Vanadium-titanium concentrate powder thick material layer sintering technology

A technology of vanadium-titanium concentrate and thick material layer, applied in the field of metallurgy, can solve the problems of the decrease of the vertical sintering speed, the restriction of the thickness of the sintered material layer, the deterioration of the gas permeability of the material layer, etc. The effect of improving the degree of restoration

Inactive Publication Date: 2018-12-14
SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above factors lead to the deterioration of the air permeability of the material layer and the decrease of the vertical sintering speed, which restricts the further increase of the thickness of the sintered material layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Mix the sintering raw materials evenly, and the sintering raw materials include 50 parts by weight of vanadium-titanium concentrate powder, 5 parts of iron concentrate powder, 3 parts of fuel, 4 parts of dolomite, and 6 parts of limestone;

[0038] Pulverize the sintered raw materials so that the part of the sintered raw materials with a particle size of 3-7mm accounts for more than 70% of the total mass fraction;

[0039] The powder is prepared into pellets after soaking with water, and the water mass contained in the pellets accounts for 10% of the total mass;

[0040] Spread the pellets onto the sintering equipment, the thickness of the fabric is 720mm;

[0041] Ignite and sinter the pellets with ventilation, the ignition temperature is 950°C, and the negative pressure of ventilation is 9KPa.

[0042] crushing the pellets so that the particle size of the pellets is ≤140mm;

[0043] Part of the crushed pellets with a particle size <5mm is screened out.

[0044] The...

Embodiment 2

[0046] Mix the sintering raw materials evenly, and the sintering raw materials include 55 parts by weight of vanadium-titanium concentrate powder, 6 parts of iron concentrate powder, 4 parts of fuel, 5 parts of dolomite, 8 parts of limestone, and 3 parts of quicklime;

[0047] Pulverize the sintered raw materials so that the part of the sintered raw materials with a particle size of 3-7mm accounts for more than 70% of the total mass fraction;

[0048] The powder is prepared into pellets after soaking with water, and the water mass contained in the pellets accounts for 9% of the total mass;

[0049] Spread the pellets onto the sintering equipment, the thickness of the fabric is 730mm;

[0050] Ignite and sinter the pellets with ventilation, the ignition temperature is 1000°C, and the suction negative pressure is 10KPa.

[0051] crushing the pellets so that the particle size of the pellets is ≤140mm;

[0052] Part of the crushed pellets with a particle size <5mm is screened ou...

Embodiment 3

[0055] Mix the sintering raw materials evenly, and the sintering raw materials include 60 parts by weight of vanadium-titanium concentrate powder, 8 parts of iron concentrate powder, 5 parts of fuel, 6 parts of dolomite, 8 parts of limestone, and 6 parts of slaked lime;

[0056] Pulverize the sintered raw materials so that the part of the sintered raw materials with a particle size of 3-7mm accounts for more than 70% of the total mass fraction;

[0057] The powder is prepared into pellets after soaking with water, and the water mass contained in the pellets accounts for 8% of the total mass;

[0058] Spread the pellets onto the sintering equipment, the thickness of the fabric is 720mm;

[0059] Ignite and sinter the pellets with ventilation, the ignition temperature is 1100°C, and the negative pressure of ventilation is 11KPa.

[0060] crushing the pellets so that the particle size of the pellets is ≤140mm;

[0061] Part of the crushed pellets with a particle size <5mm is sc...

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Abstract

The invention discloses a vanadium-titanium concentrate powder thick material layer sintering technology. The vanadium-titanium concentrate powder thick material layer sintering technology comprises the following steps that sintering raw materials are mixed to be uniform, and the sintering raw materials comprise, by weight, 50-60 parts of vanadium-titanium concentrate powder, 5-8 parts of iron oreconcentrate powder, 10-20 parts of a fluxing agent and 3-5 parts of fuel; the sintering raw materials are crushed; the powder is infiltrated with water and then prepared into pellets; the pellets aredistributed on sintering equipment, and the distributing thickness is 720-740 mm; the pellets are sintered into pellet ore; and the pellet ore is cooled. By changing the component proportion of the sintering raw materials and adding the fluxing agent to improve the air flow fluidity, therefore, the large sintering material distributing thickness is achieved, and the sintered ore quality is improved.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a thick layer sintering process of vanadium-titanium concentrate powder. Background technique [0002] Thick layer sintering is a sintering technology developed in the 1980s. Thick material layer sintering has been widely used and developed rapidly in the past 30 years due to its advantages of increasing the automatic heat storage of the material layer during the sintering process, improving heat exchange conditions, and saving solid fuel consumption. [0003] Thick layer sintering has a longer high temperature holding time, which can improve the mineralization conditions of sinter and increase the strength of sinter. With the shortage of domestic iron ore resources, some large-scale sintering plants began to use foreign ore fines, and the proportion of foreign ore fines increased year by year, which provided an objective impetus for the research on increasing the thickness of thick ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B1/24
CPCC22B1/16C22B1/2406
Inventor 向成功廖远峰张成立刘龙海杨琦鑫毛晓斌罗清明
Owner SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
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