Pelletizing method of titanium concentrate

A titanium concentrate and granulation technology, applied in the field of metallurgy, can solve problems such as large size of titanium concentrate pellets, high molding cost, and reduced pellet quality

Active Publication Date: 2017-10-24
SICHUAN PAN YAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Around 2000, Ren Chaocheng and others carried out the experimental research on the forming of fine-grained titanium concentrate. The forming process mainly includes five steps: batching, mixing, moistening, pelletizing and drying; the research results show that the compressive strength can be obtained The maximum can reach 1700N/a pellet, but there are three problems: one is that the wet ore produced on site cannot be directly used (the moisture is too high to meet the requirements of pelletizing, and pre-drying treatment is required), and the other is that it needs to be added in the process means,

Method used

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  • Pelletizing method of titanium concentrate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add titanium concentrate and strengthening agent according to the mass ratio of titanium concentrate dry basis to strengthening agent 100:1.8 and mix well to obtain a mixture. The final moisture content of the mixture is 11.8%. The strengthening agent is composed of polyvinyl alcohol: medium temperature Asphalt powder: plant adhesive = 20:5:75;

[0038] The above-mentioned mixture is granulated in an oscillating forming device with an inclination angle of 1° to obtain titanium concentrate forming wet granules; the vibration amplitude of the oscillating forming device is ±2cm, and the frequency is 12 times / s;

[0039] Pass the formed wet granules of titanium concentrate into the rotary kiln for drying with flue gas at 100°C, and finally obtain granulated dry particles of titanium concentrate, with a particle size of 3 mm to 8 mm, the mass ratio reaches 95.6%, and the average drop strength is 8.4 times / m.

Embodiment 2

[0041] Add titanium concentrate and strengthening agent according to the ratio of titanium concentrate dry weight to strengthening agent mass ratio of 100:1.3 and mix well to obtain a mixture. The final moisture content of the mixture is 13.4%. The strengthening agent is composed of polyvinyl alcohol: medium temperature Asphalt powder: plant adhesive = 60:10:30;

[0042] The above-mentioned mixture is granulated in an oscillating forming device with an inclination angle of 2.5° to obtain titanium concentrate forming wet granules; the vibration amplitude of the oscillating forming device is ±7cm, and the frequency is 5 times / s;

[0043] Pass the ilmenite concentrate shaped wet granules into the rotary kiln for flue gas drying at 220°C, and finally get the ilmenite concentrate granulated dry granules, the mass proportion of which is within the range of 3 mm to 8 mm in particle size reaches 91%, and the average drop strength is 5.4 times / m.

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Abstract

The invention provides a pelletizing method of titanium concentrate. The pelletizing method includes the following steps that the titanium concentrate and a reinforcer are mixed, and an initial mixture is obtained; the reinforcer is prepared from polyvinyl alcohol, pitch and a plant adhesive; the initial mixture is pelletized in an oscillatory type forming device, and titanium concentrate formed wet particles are obtained; and the titanium concentrate formed wet particles are dried, and titanium concentrate formed dry particles are obtained. According to the hydrophobic nature of the titanium concentrate, the organic forming reinforcer completely in physical adhesion is used for pelletizing, the percentage of the prepared titanium concentrate particles with the grain diameters ranging from 3 mm to 8 mm is larger than 90%, the drop strength is larger than 5 times per meter, the problem of flying dust generated in the titanium concentrate transferring and electric furnace smelting process is effectively solved, the normal smelting rate is guaranteed, and the electric furnace equipment operating rate and the material yield are increased.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a granulation method of titanium concentrate. Background technique [0002] Titanium concentrate is generally used as raw material for smelting acid-soluble titanium slag in electric furnace, and the flotation process of titanium concentrate results in extremely poor hydrophilicity and fine particle size. Production experience shows that the pretreatment effect of titanium concentrate raw material before smelting in electric furnace is not good , currently only powder into the furnace can be used. [0003] In the actual smelting production, on the one hand, due to the too fine particle size distribution of titanium concentrate, direct smelting into the electric furnace for a long time leads to the fine powder entering the flue with the furnace gas, resulting in the blockage of the flue and furnace gas treatment system, which affects the smooth production and dust collection. ...

Claims

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Application Information

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IPC IPC(8): C22B1/244
CPCC22B1/2406C22B1/244
Inventor 刘功国秦洁齐建玲李占军
Owner SICHUAN PAN YAN TECH
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