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Rutile roughing technology consisting of selective ore grinding, coarse particle gravity separation and fine particle floatation

A selective and grinding technology, which is applied in the field of mineral processing engineering, can solve the problems of large rutile loss, large water consumption, and chemical consumption, so as to improve the flotation separation index, reduce the consumption of chemical agent, and improve the gravity selection index. Effect

Inactive Publication Date: 2013-09-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the particle size of rutile is fine, while the particle size of gangue minerals is relatively coarse, the serious drop phenomenon in the re-selection process leads to a large loss of rutile, and the particle size of rutile is fine, so a shaking table can be used to obtain a better separation effect, and the single-machine processing capacity of the shaking table Low, large water consumption, etc. have great limitations
Flotation roughing and tailings mainly use direct flotation after grinding. The rutile ore is severely weathered and contains a large amount of primary slime. During the grinding process, a large amount of secondary slime is produced. The existence of a large amount of slime deteriorates the flotation effect. and consume a large amount of medicine

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  • Rutile roughing technology consisting of selective ore grinding, coarse particle gravity separation and fine particle floatation

Examples

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Effect test

Embodiment 1

[0021] A rutile mine in Shaanxi contains rutile TiO 2 1.98%, the gangue minerals are mainly vermiculite, hydromica, hornblende, etc., and also contain a small amount of iron-containing minerals magnetite, hematite and clay minerals. The particle size of rutile intercalation is fine, generally ranging from 0.01 to 0.1mm, which belongs to fine-grained and micro-fine particle uneven intercalation. Most rutile is arranged in intermittent stripes and streaks in the form of monomers and aggregates along the slab direction of the ore. Some are mixed with vermiculite and hydromica to form agglomerates, and some are wrapped by hornblende and biotite. Due to the severe weathering of the raw ore, the raw ore is washed with double-layer vibrating screens (the upper sieve hole is 45mm, and the lower sieve hole is 6mm) and high-pressure water is used to wash the ore. mm, the returned sand and crushed products are combined into the grinding, the steel forging diameter is 40mm, the overflow ...

Embodiment 2

[0023] A rutile mine in Henan contains rutile TiO 2 2.09%, rutile intercalation particle size is fine, generally ranging from 0.01 to 0.2mm, belonging to fine-grained, uneven micro-grain intercalation, which is refractory rutile ore. The raw ore is crushed and screened to 12mm and fed into the ore grinding. The steel forging diameter of the grinding medium is 40mm. The grinding product is sieved by a high-frequency fine sieve with a sieve hole of 0.15mm. Containing rutile TiO 2 0.31%. The underscreen material is fed into the spiral chute for one coarse and three fines, and the medium ore is re-grinded and returned for re-election. The yield of the spiral chute re-selected coarse and concentrated ore is 1.45%, the grade is 49.80%, and the recovery rate is 34.52%. Gravity separation tailings are sent to the second high-frequency fine sieve for sieving, the sieve hole is 0.1mm, and the yield of tailings on the sieve is 23.14%, containing rutile TiO 2 0.28%. Dehydrate under th...

Embodiment 3

[0025] A rutile mine in Henan contains rutile TiO 2 2.10%, rutile intercalation particle size is fine, generally ranging from 0.01 to 0.2mm, belonging to fine grains, micro-fine grain uneven intercalation, and refractory rutile ore. The raw ore is crushed and screened to 12mm and fed into the ore grinding. The steel forging diameter of the grinding medium is 60mm. The grinding product is sieved by a high-frequency fine sieve with a sieve hole of 0.3mm. Containing rutile TiO 2 0.25%. The underscreen is fed into the spiral chute for one coarse and three fines, and the middle ore is re-grinded and returned for re-election. The yield rate of the spiral chute re-selected coarse and concentrated ore is 1.40%, the grade is 50.80%, and the recovery rate is 35.12%. Gravity separation tailings are sent to the second high-frequency fine sieve for sieving, the sieve hole is 0.09mm, and the yield of tailings on the sieve is 24.14%, containing rutile TiO 2 0.27%. Dehydrate under the sie...

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Abstract

The invention discloses a rutile roughing technology for consisting of selective ore grinding, coarse particle gravity separation and fine particle floatation, belonging to the technical field of mineral processing engineering. According to the characteristics of complex mineral composition of rutile, containing of a large quantity of flaky rocky minerals in raw ore, small crystal size of rutile, non-uniform distribution, remarkable selective grinding phenomenon in an ore grinding process and the like, the technology comprises the following steps of: strengthening selective ore grinding by taking a steel forging as an ore grinding medium; pre-separating and discarding coarse particle tailings with a high-frequency fine sieve; narrowing the particle composition undersize minerals; recovering large-particle rutile by performing gravity separation, wherein rutile in gravity-separated tailings is distributed at a fine particle scale; sieving and discarding coarse-particle tailings; recovering small-particle rutile from minus sieve by suppressing rutile reverse flotation desliming and activating rutile positive floatation; and combining gravity-separated rough concentrate with floated rough concentrate, concentrating and purifying to obtain a high-quality rutile concentrate product. The technology has the characteristics of simple process, low ore dressing cost, high recovery rate, high concentration ratio, and the like.

Description

technical field [0001] The invention relates to a rutile ore roughing technology of selective grinding-coarse gravity separation-fine-grain flotation, which belongs to the technical field of mineral processing engineering. Background technique [0002] Natural rutile due to TiO 2 With high content and less impurities, it is an ideal raw material for chlorination titanium dioxide and sponge titanium. 86% of my country's natural rutile mines are primary mines, mainly distributed in Hubei, Jiangsu, Shanxi, Henan, Shaanxi, Sichuan, Anhui and other provinces. In recent years, large and extra-large rutile deposits have been discovered in Fangcheng, Henan, Shangnan, Shaanxi, Xinhai, Jiangsu, and Daixian, Shanxi. Therefore, the development and utilization of natural rutile resources in my country is of great practical significance to the development of titanium industries such as rutile titanium dioxide and sponge titanium. However, the natural rutile ore in my country belongs to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B1/00
Inventor 高利坤
Owner KUNMING UNIV OF SCI & TECH
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