A kind of beneficiation method of recovering cassiterite from tin-copper symbiotic ore

A beneficiation method and a symbiotic ore technology, applied in the field of mineral processing, can solve the problems of difficulty in ensuring a simple recovery process, affecting the cassiterite flotation operation, increasing the cost of flotation reagents, etc., so as to optimize the cassiterite flotation environment and reduce the beneficiation cost. , the effect of excellent product structure

Active Publication Date: 2021-08-27
广东省资源综合利用研究所
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AI Technical Summary

Problems solved by technology

Due to the high sulfur content of the material treated by this process, although sulfuric acid and copper sulfate are selected for activation and pulping, there are still some sulfur with poor floatability (sulfur grade 1.74%) in the floating sulfur tailings, which affects the subsequent cassiterite flotation. In addition, the pH of the ore pulp from sulfur floating to tin floating operation changes from acid to alkali, which will inevitably increase the cost of flotation reagents
[0005] In the existing cassiterite recovery method, it is difficult to ensure that the recycling process is simple, the dosage of flotation reagents is small, and the cost of flotation reagents is low. It is necessary to further improve the method of cassiterite recovery

Method used

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  • A kind of beneficiation method of recovering cassiterite from tin-copper symbiotic ore
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  • A kind of beneficiation method of recovering cassiterite from tin-copper symbiotic ore

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Schematic diagram of cassiterite recovery process figure 1 As shown, the specific process is:

[0035] S1. Grinding the raw ore to -0.074mm accounts for 75%; adjust the pulp concentration to 30%;

[0036] S2. Flotation of copper sulfur: 80 g / ton of copper chloride, 100 g / ton of methyl isobutyl carbinol xanthate, 30 g / ton of terpineol oil and ethylthiourethane mixed in a mass ratio of 1:1 are added in sequence. Ton for a rough selection; add methyl isobutyl carbinol xanthate 35 g / ton, terpineol oil and thiocarbamate mixed at a mass ratio of 10 g / ton to do a sweep; add methyl isobutyl 20 g / ton of butyl carbinol xanthate, 10 g / ton of terpineol oil and thiocarbamate mixed at a mass ratio of 1:1 are used for secondary sweeping; the rough selection foam is used for secondary blank selection; copper-sulfur Mixed concentrate and floating sulfur tailings;

[0037] S3. Magnetic separation: use a high-gradient strong magnetic separator for floating sulfur tailings to perform ma...

Embodiment 2

[0041] The raw ore sample that this example uses is with example 1. The specific cassiterite recovery process is the same as in Example 1, except that the floating sulfur tailings in step S3 are subjected to strong magnetic separation under the condition of a background field strength of 0.4T to obtain magnetic separation concentrate and magnetic separation tailings; in step S4 As shown in Table 1 of the medicament and its consumption part that adopts, obtain tin grade and be 6.32%, tin recovery rate is 86.15% float tin concentrate and float tin tailings; Then according to the S5 step among the embodiment 1, float tin concentrate The Nelson centrifugal concentrator was used for separation to obtain a tin concentrate with a tin grade of 40.25% and a recovery rate of 75.77% and a tin sub-concentrate with a tin grade of 0.88% and a recovery rate of 10.38%.

Embodiment 3

[0043] The raw ore sample that this example uses is with example 1. The specific cassiterite recovery process is the same as in Example 1, except that the floating sulfur tailings in step S3 are subjected to strong magnetic separation under the condition of a background field strength of 0.4T to obtain magnetic separation concentrate and magnetic separation tailings; in step S4 As shown in the medicament and consumption part table 1 of adopting, obtain tin grade and be 6.56%, tin recovery rate is 86.62% floating tin concentrate and floating tin tailings; Then according to the S5 step among the embodiment 1, the floating tin concentrate The Nelson centrifugal concentrator was used for separation to obtain tin concentrate with a tin grade of 40.13% and a recovery rate of 75.77% and a tin sub-concentrate with a tin grade of 0.96% and a recovery rate of 10.85%.

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Abstract

The invention discloses a beneficiation method for recovering cassiterite from tin-copper symbiotic ore. The method is as follows: first grinding the raw ore; obtaining copper-sulfur mixed concentrate and floating sulfur tailings by flotation of copper and sulfur; then magnetically separating the floating sulfur tailings to obtain magnetic separation concentrate and magnetic separation tailings; The magnetic separation tailings are flotation with specific reagents to obtain the floating tin concentrate and tailings; finally, the floating tin concentrate is centrifugally separated to obtain tin concentrate and tin sub-concentrate. In the flotation process of cassiterite, the method of the present invention uses selective flocculation of fine-grained cassiterite and uses a specific combination of inhibitors, which can reduce the use of collectors, reduce the cost of agents, and ensure the recovery of cassiterite The grade and recovery rate are not reduced, the tin grade is greater than 40%, and the total recovery rate is greater than 85%. The method adopts full flotation without desliming to realize efficient enrichment of cassiterite, with short process flow, good technical indicators, and excellent structure of recovered products. It has high application value in the recovery of cassiterite.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a beneficiation method for recovering cassiterite from tin-copper symbiotic ore. Background technique [0002] With the gradual reduction of tin placer resources in my country, tin-copper paragenetic ore has become one of the main sources of tin. However, such tin resources generally have high sulfur content, and there is a large difference in floatability between chalcopyrite and some sulfide ores such as pyrite and pyrrhotite, and the ore properties are complex. It is worth noting that since sulfide minerals are more floatable than cassiterite, if the sulfide ores are not effectively removed before cassiterite flotation, cassiterite flotation reagents will be consumed, which will increase the cost of tin selection; The requirements for sulfur-containing impurities are extremely strict (S grade is less than 1%). Therefore, desulfurization before tin selection is very...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/018B03D1/00B03D3/06B03C1/30B03D101/02B03D101/06B03D103/02
CPCB03C1/30B03D1/00B03D1/018B03D3/06B03D2201/02B03D2201/06B03D2203/02
Inventor 汪泰胡真李汉文邱显扬汤玉和李沛伦叶小璐付华邹坚坚王成行杨凯志姚艳清
Owner 广东省资源综合利用研究所
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