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A method for enriching tin in low-grade apt slag

A technology of enrichment and concentration, applied in the field of comprehensive recycling of resources, can solve the problems of not being able to obtain economic benefits, and achieve the effects of low production cost, simple process and strong operability

Active Publication Date: 2022-02-01
广东诚一环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For waste recycling companies, the traditional simple production method of recycling tin can no longer achieve economic benefits. How to explore new processes to make enterprises motivated and profitable recycling has become the development direction of waste disposal

Method used

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  • A method for enriching tin in low-grade apt slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The selected APT slag is Chenzhou tungsten slag material, and the original tin content is determined to be 0.80%.

[0041] The first enrichment process includes the following steps:

[0042] S1. Add the APT slag to clean water for ball milling, the solid-to-liquid mass ratio is 1:2, the ball milling fineness is 300 mesh, and put it into a stirring tank for stirring;

[0043] S2, during the stirring process of step S1, add dilute hydrochloric acid with a concentration of 5% to adjust the pH value. After the adjustment, the pH value of the solution is 7, and stir at a stirring speed of 100 r / min, and the stirring time is 60 minutes. Press filtration , realize the separation of residue and liquid, and obtain the first press filter liquid and the first press filter residue;

[0044]S3. Put the first filter press liquid obtained in step S2 into other metal recovery processes, wash the first filter press residue obtained in step S2 with clear water once, the solid-liquid mas...

Embodiment 2

[0058] The selected APT slag is Ganzhou tungsten slag, and the original tin content is determined to be 0.60%.

[0059] The first enrichment process includes the following steps:

[0060] S1. Add the APT slag to clean water for ball milling, the solid-to-liquid mass ratio is 1:1.5, and the ball milling fineness is 300 mesh, and put it into a stirring tank for stirring;

[0061] S2, during the stirring process of step S1, add dilute hydrochloric acid with a concentration of 4% to adjust the pH value. After the adjustment, the pH value of the solution is 8. Stir, the stirring speed is 80r / min, and the stirring time is 50 minutes. Press filtration , realize the separation of residue and liquid, and obtain the first press filter liquid and the first press filter residue;

[0062] S3. Put the first filter press liquid obtained in step S2 into other metal recovery processes, wash the first filter press residue obtained in step S2 with clear water once, the solid-liquid mass ratio d...

Embodiment 3

[0076] The selected APT slag is Fujian tungsten slag material, and the original tin content is determined to be 0.72%.

[0077] The first enrichment process includes the following steps:

[0078] S1. Add the APT slag to clean water for ball milling, the solid-to-liquid mass ratio is 1:2.5, the ball milling fineness is 300 mesh, and put it into a stirring tank for stirring;

[0079] S2, during the stirring process of step S1, add dilute hydrochloric acid with a concentration of 6% to adjust the pH value. After the adjustment, the pH value of the solution is 6, and stir at a stirring speed of 120r / min, and the stirring time is 70 minutes, and press filter , realize the separation of residue and liquid, and obtain the first press filter liquid and the first press filter residue;

[0080] S3. Put the first filter press liquid obtained in step S2 into other metal recovery processes, wash the first filter press residue obtained in step S2 with clear water once, the solid-liquid mas...

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Abstract

The invention relates to the technical field of resource comprehensive recovery and utilization, and discloses a method for enriching tin in low-grade APT slag, including four continuous enrichment processes; after the first enrichment process is completed, the content of tin in the APT slag can be reduced Increased to 1.2‑1.5 times, the content reached 0.72%‑1.20%; after the second enrichment process was completed, the content of tin in the APT slag was increased to 1.2‑1.5 times, and the content reached 0.86%‑1.80%; the third time After the enrichment process is completed, the tin element content in the APT slag is further increased to 1.5-2.0 times, and the content reaches 1.29%-3.60%; after the fourth enrichment process is completed, the tin element content in the APT slag is further increased to 8.0- 12.0 times, the content reached 15.0%-30.2%; after four times of enrichment and comprehensive conversion, the total recovery rate of tin element was 73.9%-80.5%. For the present invention, through four continuous enrichment processes, the tin element is effectively enriched, the process is simple, the operability is strong, the production cost is low, and the environment is friendly, and the environmental protection, social benefits and economic benefits of the enterprise are realized. win-win.

Description

technical field [0001] The invention relates to the technical field of resource comprehensive recycling, in particular to a method for enriching tin in low-grade APT slag. Background technique [0002] my country has listed the resource comprehensive utilization industry as a strategic emerging industry. At present, there are nearly 700,000 tons of waste APT (ammonium paratungstate) production slag in the country, and nearly 150,000 tons of slag are added every year. As the technology of APT manufacturers matures day by day, the remaining tungsten content in the produced production slag has been reduced from the previous 3%-5% to 0.7%-1.8%. For waste recycling companies, the traditional simple production method of recycling tin can no longer achieve economic benefits. How to explore new processes to make enterprises motivated and profitable recycling has become the development direction of waste disposal. [0003] Therefore, there is an urgent need to develop a low-cost pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00
CPCC22B25/06C22B25/04C22B7/007C22B1/005Y02P10/20
Inventor 朱国平张仲军杨剑杨乐能廖云秀
Owner 广东诚一环保科技有限公司