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Beneficiation method for recovering tin and silver from skarn type low-grade tin tailings

A beneficiation method and low-grade technology, applied in chemical instruments and methods, flotation, magnetic separation, etc., can solve the problems of high cost, low efficiency of fine-grained cassiterite, poor rationality, etc., and achieve low production cost, flotation agent The effect of low dosage and improved efficiency

Active Publication Date: 2019-11-22
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the defects or deficiencies of low efficiency, high cost and poor rationality in the sorting of fine-grained cassiterite in the ore dressing method of the prior art, and provide a kind of skarn type low-grade tin tailings recovery Tin and silver beneficiation method

Method used

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  • Beneficiation method for recovering tin and silver from skarn type low-grade tin tailings

Examples

Experimental program
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Effect test

Embodiment 1

[0052] This embodiment provides a kind of beneficiation method for reclaiming tin and silver in skarn type low-grade tin tailings, such as figure 1 , the specific process is as follows.

[0053]The tin content of a certain tin tailings is 0.49%, the silver grade is 25.30g / t, and the -0.074mm ore sample is taken by screening, accounting for 100% of the ore. After gravity separation in a centrifuge, centrifugal concentrate and centrifugal tailings are obtained. The yield of centrifugal tailings is 67.74%. , tin grade 0.19%, tin recovery rate 26.27%. Add water to the centrifugal concentrate to adjust the slurry to a concentration of 30%. According to each ton of ore, add 500 grams of sodium silicate, 80 grams of O-isopropyl-N-ethylthiocarbamate and 40 grams of methyl amyl alcohol Roughing, adding 40 grams of O-isopropyl-N-ethyl thiocarbamate and 20 grams of methyl amyl alcohol to the roughing tailings for scavenging, the roughing concentrate and the scavenging concentrate are co...

Embodiment 2

[0055] This embodiment provides a kind of beneficiation method for reclaiming tin and silver in skarn type low-grade tin tailings, such as figure 1 , the specific process is as follows.

[0056] The tin content of a certain tin tailings is 0.41%, the silver grade is 21.22g / t, and the -0.074mm ore sample is screened to account for 100%. After gravity separation by a centrifuge, centrifugal concentrate and centrifugal tailings are obtained. The yield of centrifugal tailings is 69.70%. , tin grade 0.14%, tin recovery rate 23.80%. Add water to the centrifugal concentrate to adjust the slurry to a concentration of 28%, and add 1,000 grams of sodium silicate, 100 grams of 1,3-dimethylbutyl xanthate and 40 grams of methyl amyl alcohol for roughing in turn according to each ton of ore. Add 50 grams of 1,3-dimethylbutyl xanthate sodium and 20 grams of methyl amyl alcohol to the roughing tailings for scavenging, the roughing concentrate and the scavenging concentrate are combined into ...

Embodiment 3

[0058] This embodiment provides a kind of beneficiation method for reclaiming tin and silver in skarn type low-grade tin tailings, such as figure 1 , the specific process is as follows.

[0059] The tin content of a certain tin tailings is 0.54%, the silver grade is 34.79g / t, and the -0.074mm ore samples are taken by screening, accounting for 100% of the ore. After gravity separation by a centrifuge, centrifugal concentrate and centrifugal tailings are obtained. The yield of centrifugal tailings is 69.31%. , tin grade 0.21%, tin recovery rate 26.95%. Add water to the centrifugal concentrate to adjust the slurry to a concentration of 32%. According to each ton of ore, add 2000 grams of sodium silicate, 90 grams of dibutyl ammonium dithiophosphate and 30 grams of methyl isobutyl carbitol for roughing. 45 grams of dibutyl ammonium dithiophosphate and 15 grams of methyl isobutyl carbitol were added to the tailings for scavenging, and the roughing concentrate and scavenging concen...

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Abstract

The invention relates to a beneficiation method for recovering tin and silver from skarn type low-grade tin tailings. The beneficiation method comprises the following steps that: S1, ore samples are subjected to gravity separation and tailing discarding, the centrifugal gravity separation concentrates are subjected to primary flotation roughing, primary scavenging and primary blank concentration,and silver concentrates and flotation tailings are obtained; S2, the magnetic separation flotation tailings are subjected to centrifugal gravity separation, and magnetic separation concentrates and magnetic separation tailings are obtained; grading the magnetic separation tailings into a +A size fraction and a -A size fraction; S3, +A size fraction gravity separation is conducted, and cassiteritetable concentrates and the like are obtained; S4, cassiterite shaking table concentrate is collected for size mixing and the like to serve as carrier minerals; S5, size mixing is conducted on the sizefraction A, and a micro-fine particle cassiterite ore sample is obtained; S6, carrier minerals are added into the micro-fine particle cassiterite ore sample, a collecting agent and the like are added, and ore pulp is obtained; and S7, the ore pulp obtained in the S6 is subjected to flotation, and flotation concentrate and flotation tailings are obtained. The beneficiation method provided by the invention is simple in technological process, low in production cost, low in flotation reagent dosage, capable of remarkably improving the recovery rate of the micro-fine particle cassiterite and highin adaptability.

Description

technical field [0001] The invention relates to the technical field of mineral processing, and more specifically relates to a mineral processing method for recovering tin and silver from skarn-type low-grade tin tailings. [0002] technical background [0003] The long-term development and utilization of tin ore resources has greatly promoted the development of the world economy, but it has also caused hundreds of millions of tons of tin tailings to be piled up all over the world, occupying a large area of ​​land and becoming one of the environmental hazards. These tailings were stored as waste at that time. According to tests, such a huge amount of so-called waste contains a lot of valuable components, and some people have called it an "artificial mineral deposit". With the passage of time, tin ore resources are increasingly depleted, and the selected grade is getting lower and lower, and some are close to or even lower than the old tailings. Therefore, can the old tailings ...

Claims

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Application Information

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IPC IPC(8): B03D1/018B03B9/00B03C1/30B03D101/02B03D101/04B03D101/00B03D103/04
CPCB03D1/018B03B9/00B03C1/30B03D2201/007B03D2201/02B03D2201/04B03D2203/04
Inventor 王成行邱显扬胡真李汉文丘世澄李沛伦汪泰杨凯志邹坚坚姚艳清李强时晗
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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