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Method for improving grade of rutile through microwave pretreatment-magnetic separation combined process

A combined process and pretreatment technology, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of not meeting the requirements of titanium dioxide raw materials into the furnace, and achieve low cost, good environment and easy operation Effect

Active Publication Date: 2012-01-18
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for improving the grade of rutile through microwave pretreatment-magnetic separation combined process, so as to solve the problem that the current grade of rutile ore cannot meet the requirements of raw materials for titanium dioxide production by hydrochloric acid method or sulfuric acid method.

Method used

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  • Method for improving grade of rutile through microwave pretreatment-magnetic separation combined process

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Example 1: according to figure 1 As shown in the process flow, 100g of natural rutile ore is subjected to microwave irradiation for 20s, the microwave power is 1kW, and the microwave frequency is 2350MHz, and then the ore grinding treatment is carried out. The ore grinding time is 40min. After grinding, the rutile ore particle size is below 200 mesh. 80g, the rutile ore after grinding is put into the magnetic separation equipment with current intensity of 3A, and magnetic separation is carried out to obtain iron concentrate and enriched rutile ore. The grade of rutile after magnetic separation is 90.12%, which is higher than that before magnetic separation. An increase of 2.58%.

Embodiment 2

[0015] Example 2: according to figure 1 As shown in the process flow, 150g of artificial rutile ore is subjected to microwave irradiation for 60s, the microwave power is 3kW, and the microwave frequency is 2550MHz, and then the ore grinding treatment is carried out, and the grinding time is 60min. After grinding, the rutile ore particle size is below 200 mesh. 128g, put the rutile ore after grinding into the magnetic separation equipment with a current intensity of 5A, and carry out magnetic separation to obtain iron concentrate and enriched rutile ore. The grade of rutile after magnetic separation is 91.25%, which is higher than that before magnetic separation. An increase of 3.71%.

Embodiment 3

[0016] Embodiment 3: press figure 1 As shown in the process flow, 200g of natural rutile ore is subjected to microwave irradiation for 40s, the microwave power is 2kW, and the microwave frequency is 2450MHz, and then the ore grinding treatment is carried out, and the grinding time is 50min. After grinding, the rutile ore particle size is below 200 mesh. 180g, the rutile ore after grinding is put into the magnetic separation equipment with a current intensity of 4A, and magnetic separation is carried out to obtain iron concentrate and enriched rutile ore. The grade of rutile after magnetic separation is 90.87%, which is higher than that before magnetic separation. An increase of 3.33%.

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Abstract

The invention discloses a method for improving the grade of rutile through a microwave pretreatment-magnetic separation combined process, which belongs to the technical field of ore dressing. Firstly, the rutile carires out microwave radiation for 20 to 60s and carries out ore milling treatment for 40 to 60min, and the finely milled rutile is placed into magnetic separation equipment for magnetic separation. Through the microwave radiation before the magnetic separation, partial metallic iron and iron oxide in the rutile ore are selectively melted out, through the crushing and the magnetic separation in the later period, the part of impurities can be separated out, the grade of the rutile ore is improved, and the problem that the grade of the rutile ore in the prior art can not reach the raw material furnace entering requirement of hydrochloric acid process or sulfuric acid process titanium pigment production is solved.

Description

technical field [0001] The invention relates to a method for improving the grade of rutile by combining microwave pretreatment and magnetic separation, and belongs to the technical field of mineral processing. Background technique [0002] Natural rutile and artificial rutile are produced by hydrochloric acid method and sulfuric acid method to produce titanium dioxide (TiO 2 ) One of the important raw materials for pigments. At present, the supply of available high-grade natural rutile is sharply reduced, and it is increasingly urgent to explore a method for producing high-grade rutile with lower energy consumption and less environmental pollution. Rutile ore is associated with other non-ferrous metal resources such as vanadium, chromium, nickel, cobalt, platinum group, etc. These available components in minerals also have important application value, but the complex mineral composition and structural characteristics make it difficult for traditional methods to improve the ...

Claims

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Application Information

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IPC IPC(8): B03C1/00B03C1/005
Inventor 彭金辉陈菓陈晋郭胜惠张利波张泽彪
Owner KUNMING UNIV OF SCI & TECH
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