Combined ore-dressing method for recovering superfine cassiterite from oxidized tin tailings

A beneficiation method and oxidation-type technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of complex components, large mud content, low grade, etc., and achieve simple process, high recovery rate, and total low cost effect

Inactive Publication Date: 2011-10-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the tailings discarded after tin gravity separation, due to the low grade, fine particle size, large mud content, complex composition, high content of limonite and hematite, etc., the traditional gravity separation method is used to remove the tailings from the tailings. The recovery of valuable metal components is very poor in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0023] The content of -0.037mm particle size accounted for 100% (of which -5 micron particle size accounted for 28.7%), the tin grade was 0.156%, the Fe grade was 10.8%, the CaO content was 16.6%, the MgO content was 11.3%, and the SiO content was 11.3%. 2 Tailings with a content of 15.6%.

[0024] A. Add 500g of polyacrylamide per ton of the above-mentioned tin-containing tailings and mix to obtain the slurry material;

[0025] B. The ore slurry material of step A was stirred for 5 minutes, to form condensed tin mineral;

[0026] C. The condensed tin minerals in step B are subjected to gravity separation and enrichment to obtain tin middlings and tailings.

[0027] The obtained middling tin grade and recovery rate were 2.68% and 63.60%, respectively. After adding the agent, the recovery rate of tin can be increased by 15-20 percentage points.

Embodiment example 2

[0029] The content of -0.037mm particle size accounted for 100% (of which -5 micron particle size accounted for 23.7%), the grade of tin was 0.165%, the grade of Fe was 9.7%, the content of CaO was 14.5%, the content of MgO was 8.6%, and the content of SiO 2 Tin tailings with a content of 18.7%.

[0030] A. Add 850g of oleic acid and sodium chloride per ton of the above-mentioned tin-containing tailings for mixing to obtain a slurry material;

[0031] B. The ore slurry material of step A was stirred for 4 minutes to form condensed tin minerals;

[0032] C. The condensed tin minerals in step B are subjected to gravity separation and enrichment to obtain tin middlings and tailings.

[0033] The obtained middling tin grade and recovery rate were 2.98% and 62.55%, respectively. After adding the agent, the recovery rate of tin is increased by 16.2-19.5 percentage points.

Embodiment example 3

[0035] The content of -0.037mm particle size accounted for 100% (of which -5 micron particle size accounted for 16.8%), the grade of tin was 0.253%, the grade of Fe was 11.4%, the content of CaO was 13.1%, the content of MgO was 9.4%, and the content of SiO 2 Tailings with a content of 19.2%.

[0036] A. Add 1500g of polynuclear polysilicic acid, sodium sulfide, sodium hydroxide and sodium silicate to the above-mentioned tin-containing tailings per ton and mix to obtain the pulp material;

[0037] B. The ore slurry material of step A was stirred for 3 minutes, to form condensed tin mineral;

[0038] C. The condensed tin minerals in step B are subjected to gravity separation and enrichment to obtain tin middlings and tailings.

[0039] The obtained middling tin grade and recovery rate were 3.36% and 60.28%, respectively. After adding the agent, the recovery rate of tin is increased by 15.3-19.8 percentage points.

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PUM

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Abstract

The invention provides a combined ore-dressing method for recovering superfine cassiterite from oxidized tin tailings. The method comprises the following steps: adding 10-1500g flocculating agent and/or coagulant into one ton of tin-containing tailings, and uniformly mixing, thereby acquiring an ore pulp material; stirring for 0.5-5 minutes till forming a coagulated tin mineral; and then performing conventional gravity concentration, separation and enrichment, thereby acquiring a tin middling product and tailings, wherein the grade of the tin middling product can reach 2-3.5% and the recovery rate can reach 40-65%. The ore-dressing method for recovering superfine tin is simple, the process is simple and short, and the cost of drugs is low. By using the method, the purpose of recovering tin from the superfine grain/slurry tin tailings, with low cost, no environmental pollution and high efficiency, can be achieved. The method can be easily industrialized.

Description

technical field [0001] The invention relates to a combined mineral processing method for recovering fine-grained cassiterite from oxidized tin tailings by a selective coagulation-gravity separation method, and belongs to the technical field of mineral processing or mineral processing. Background technique [0002] With the long-term development and utilization of tin resources, tin ore resources are gradually exhausted, and hundreds of millions of tons of tin tailings are piled up all over the world. These tailings also contain rich fine-grained tin minerals. However, the tailings are left after beneficiation, and the tin minerals in them have a very fine particle size, which cannot be efficiently recycled or has no economic benefits after recycling. With the advancement of fine-grained tin mineral processing technology, the utilization of fine-grained tin resources has been improved, and the mineable grade of tin ore has been reduced accordingly, and the selected grade is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
Inventor 童雄雷毅王建国范立
Owner KUNMING UNIV OF SCI & TECH
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