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A method for impurity removal and purification of titanium concentrate by suspension roasting

A technology of suspension roasting and suspension roasting furnace, which is applied in the field of metallurgy, can solve the problems of failing to meet the requirements of high-quality titanium concentrate, and achieve the effects of operating productivity and operating efficiency, simple process flow, and large equipment processing capacity

Active Publication Date: 2021-06-15
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the previous process, this process has improved titanium grade and recovery rate, but the titanium concentrate TiO obtained in the invention example 2 The grades are all lower than 48%, which also does not meet the requirements of high-quality titanium concentrate

Method used

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  • A method for impurity removal and purification of titanium concentrate by suspension roasting
  • A method for impurity removal and purification of titanium concentrate by suspension roasting
  • A method for impurity removal and purification of titanium concentrate by suspension roasting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Grind titanium concentrate until the particle size is ≤ 0.074mm, accounting for 80% of the total mass, and make titanium concentrate powder; titanium concentrate contains TiO by mass percentage 2 48.54%, Fe 26.23%, MgO 4.31%, Al 2 o 3 1.67%, CaO 0.93%, SiO 2 4.62%;

[0038] The titanium concentrate powder is subjected to a stage of magnetic separation, the magnetic field strength of the stage of magnetic separation is 1000Oe, and a stage of magnetic separation concentrate and a stage of magnetic separation tailings are obtained;

[0039] A section of magnetic separation tailings is dewatered by pressure filtration to make a press filter residue with a mass percentage of water ≤ 10%, and then the press filter residue is transported to a dry suspension roaster, and at the same time, a high temperature of 100-150°C is introduced into the dry suspension roaster Flue gas, under the action of high-temperature flue gas, the filter press residue is in a suspended state and...

Embodiment 2

[0043] Method is with embodiment 1, and difference is:

[0044] (1) Titanium concentrate contains TiO by mass percentage 2 41.21%, Fe 25.32%, MgO 4.66%, Al 2 o 3 2.52%, CaO 1.54%, SiO 2 5.54%; the part where the titanium concentrate is ground to a particle size of ≤0.074mm accounts for 75% of the total mass;

[0045] (2) The magnetic field strength of a section of magnetic separation is 1500Oe;

[0046] (3) The residence time of the filter press residue in the suspension roaster is 25min;

[0047] (4) Heating to 700°C for weak oxidation reaction for 30 minutes;

[0048] (5), the magnetic field intensity of the second stage magnetic separation is 1500Oe; the purified titanium concentrate product contains TiO by mass percentage 2 53.24%, TFe 27.53%, MgO 2.21%, Al 2 o 3 1.02%, CaO 0.94%, SiO 2 2.32%; Titanium recovery rate 85.73%.

Embodiment 3

[0050] Method is with embodiment 1, and difference is:

[0051] (1) Titanium concentrate contains TiO by mass percentage 2 46.72%, Fe 38.57%; the portion of titanium concentrate ground to a particle size ≤ 0.038mm accounts for 90% of the total mass;

[0052] (2) The magnetic field strength of a section of magnetic separation is 2000Oe;

[0053] (3) The residence time of the filter press residue in the suspension roaster is 25min;

[0054] (4) Heating to 800°C for weak oxidation reaction for 20 minutes;

[0055] (5), the magnetic field intensity of the second stage magnetic separation is 2000Oe; the purified titanium concentrate product contains TiO by mass percentage 2 53.24%, TFe 27.53%, MgO 2.21%, Al 2 o 3 1.02%, CaO 0.94%, SiO 2 2.32%; Titanium recovery rate 85.73%.

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Abstract

A method for impurity removal and purification of titanium concentrate by suspending roasting, which is carried out according to the following steps: (1) grinding the titanium concentrate; Tailings; (3) The tailings of a section of magnetic separation are dehydrated by pressure filtration, and the filter residue is transported to a dry suspension roaster, which is fed into a high-temperature flue gas for suspension drying; (4) The dry material is transported to a weak oxidation suspension roaster. In the heating section, it is heated to 600-800°C, enters the oxidation section and undergoes a weak oxidation reaction under the action of air, and the weak oxidation material is cooled by heat exchange to form a cooling material; (5) The cooling material is subjected to a second-stage magnetic separation to obtain a second-stage magnetic separation Concentrate and second-stage magnetic separation tailings; first-stage magnetic separation concentrate and second-stage magnetic separation concentrate are used as purified titanium concentrate products. The invention has the advantages of simple technological process, large equipment processing capacity, easy control of product properties, energy saving and environmental protection in industrial application, and easy realization of large-scale.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a method for suspension roasting, impurity removal and purification of titanium concentrate. Background technique [0002] In my country, titanium resources mainly come from the vanadium-titanium magnetite in Panxi, Sichuan and Chengde, Hebei, etc. After complex beneficiation processes, vanadium-containing concentrates and titanium-containing concentrates are obtained, among which titanium-containing concentrates can be used to prepare titanium dioxide . Titanium dioxide mostly adopts the electric furnace smelting-titanium slag upgrading process. The preparation of high-quality titanium dioxide by this process requires low impurity content in titanium concentrates. At present, most of the titanium concentrates supplied in China do not meet the standards; Removing impurities is of great significance to alleviate the shortage of high-quality titanium concentrate in my country. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/12B03C1/015C22B1/02
CPCB03C1/015C22B1/02C22B34/1204Y02P10/20
Inventor 袁帅韩跃新王勋李艳军高鹏
Owner NORTHEASTERN UNIV LIAONING
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