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Flotation method for reducing sulfur in bauxite concentrate

A bauxite and concentrate technology, applied in flotation, solid separation, etc., can solve the problems of difficulty in the smelting process, increase the cost of smelting, reduce the quality and performance of aluminum products of smelting products, and achieve enhanced buoyancy and improved hydrophobicity High performance and high sulfur removal rate

Inactive Publication Date: 2013-06-26
广西冶金研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the symbiotic deposits of sulfide ore and bauxite, when the bauxite is recovered by ore dressing, the sulfur grade of the bauxite concentrate is difficult to meet the requirement of less than 0.5% sulfur grade for bauxite smelting, which will bring difficulty and increase the smelting process. Smelting costs, especially reducing the quality and properties of the smelted product aluminum

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Mineral raw materials:

[0026] Raw material ore Al 2 o 3 The grade is 43.57%, and the sulfur grade is 20.30%. The technical mineralogy research shows that: the aluminum-containing minerals are mainly gibbsite and gibbsite, and the sulfur-containing minerals are mainly pyrite.

[0027] 2. Flotation agents and operating conditions:

[0028] First, the raw ore is ground until the mineral monomers are dissociated, then 500g / t of ethylamine oxalate is added as a sulfide mineral activator, and then 80g / t of butyl xanthate + 40g / t of butylammonium black medicine is added to combine collector and foaming agent No. 2 oil is 50g / t, and sulfur-containing minerals are flotationed using a rough three-sweep two-fine flotation process to obtain a bauxite concentrate yield of 44.18%, Al 2 o 3 Grade 72.06%, sulfur grade 0.27%, Al 2 o 3 The recovery rate is 73.06%, and the sulfur removal rate is 99.51%.

Embodiment 2

[0030] 1. Mineral raw materials:

[0031] Raw material ore Al 2 o 3 The grade is 70.33%, and the sulfur grade is 1.71%. The technical mineralogy research shows that: the aluminum-containing minerals are mainly gibbsite and gibbsite, and the sulfur-containing minerals are mainly pyrite.

[0032] 2. Flotation agents and operating conditions:

[0033] First, grind the raw ore until the mineral monomers are dissociated, then add 200g / t of sulfide ore activator ethylamine oxalate, then add 20g / t of butyl xanthate + 10g / t of butyl ammonium black medicine combined collector and foaming agent No. 2 oil is 20g / t, and sulfur-containing minerals are flotationed using a rough three-sweep two-fine flotation process to obtain a bauxite concentrate yield of 87.32%, Al 2 o 3 Grade 72.16%, sulfur grade 0.19%, Al 2 o 3 The recovery rate is 89.59%, and the sulfur removal rate is 88.94%.

Embodiment 3

[0035] 1. Mineral raw materials:

[0036] Raw material ore Al 2 o 3 The grade is 39.94%, and the sulfur grade is 24.01%. The technical mineralogy research shows that the aluminum-containing minerals are mainly gibbsite and gibbsite, and the sulfur-containing minerals are mainly pyrite.

[0037] 2. Flotation agents and operating conditions:

[0038] First, the raw ore is ground until the mineral monomers are dissociated, then 500g / t of ethylamine oxalate is added as a sulfide mineral activator, and then 80g / t of butyl xanthate + 40g / t of butylammonium black medicine is added to combine collector and foaming agent No. 2 oil is 50g / t, and sulfur-containing minerals are flotationed using a rough three-sweep two-fine flotation process to obtain a bauxite concentrate yield of 44.90%, Al 2 o 3 Grade 71.96%, sulfur grade 0.39%, Al 2 o 3 The recovery rate is 80.71%, and the sulfur removal rate is 99.02%.

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Abstract

Disclosed is a flotation method for reducing sulfur in bauxite concentrate. The method includes the following steps: grinding raw material ore with 40%-70% of Al2o3 grade and 2%-24% of sulfur grade to mineral monomer, and then separating the mineral monomer; adding sulphide ore activator oxalate ethylamine; activating flotation of sulphide ore which is difficult to float; adding sodium n-butylxanthate and dithiophosphate BA compounded collectors and foaming agent oil 2; floating out sulfur-containing mineral with a mechanical-stirring-type flotation machine; and acquiring bauxite concentrate with the sulfur content less than 0.5%. Smelting requirements can be met.

Description

1. Technical field [0001] The invention relates to a flotation method for reducing the sulfur content of bauxite concentrate, mainly for the high sulfur content of bauxite concentrate, and it is difficult for conventional flotation reagents to reduce the sulfur grade of bauxite concentrate to the sulfur requirement for smelting< 0.5%. Using a new type of high-efficiency ethylamine oxalate sulfide ore activator and combined collector for flotation desulfurization can reduce the sulfur grade of bauxite concentrate to below 0.5%. 2. Background technology [0002] In the symbiotic deposits of sulfide ore and bauxite, when the bauxite is recovered by ore dressing, the sulfur grade of the bauxite concentrate is difficult to meet the requirement of less than 0.5% sulfur grade for bauxite smelting, which will bring difficulty and increase the smelting process. The cost of smelting, especially reduces the quality and performance of the smelted product aluminum. 3. Contents of t...

Claims

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Application Information

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IPC IPC(8): B03D1/014B03B1/04B03D101/02
Inventor 陆智潘莲辉罗海燕林榜立丘盛华蔡振波李宁钧卢淋王檑阙绍娟
Owner 广西冶金研究院有限公司
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