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A kind of comprehensive recycling process of tin, copper, gold and silver waste

A technology for gold, silver and waste, applied in the field of recycling technology, can solve the problems of environmental pollution, low recycling efficiency, single recycled products, etc., and achieve the effects of not easy environmental pollution, high recycling efficiency, and comprehensive recycling.

Active Publication Date: 2018-02-02
NANKANG HENGYUAN CYCLE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the existing recovery process of tin, copper, gold and silver wastes, the recovery products are single, the recovery efficiency is low, and the shortcomings of easy to cause environmental pollution, the technical problem to be solved by the invention is to provide a comprehensive recovery product, high recovery efficiency, and not easy to cause Comprehensive recycling process of environmentally polluted tin, copper, gold and silver waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A comprehensive recycling process for tin, copper, gold and silver waste, specifically comprising the following steps:

[0037] A. Utilize ball mill to carry out ball milling to tin copper gold and silver waste material, the material is ground;

[0038] B. Heat and dry the material treated by A, the heating temperature is 300°C, and the heating time is 3 hours;

[0039]C. roasting the material treated by B in a rotary kiln, the roasting temperature is 500°C, and the roasting time is 4 hours;

[0040] D. The materials processed by C are crushed with a Raymond mill, and the materials are thoroughly crushed;

[0041] E. Add the material treated by D into distilled water for soaking, and add sulfuric acid to adjust the pH of the soaking solution to 1.5, the soaking solid-liquid ratio is 5:1, and the soaking temperature reaches 80°C by steam heating, and the soaking time is 5 hours. Afterwards, it is filtered through a chamber filter press to achieve solid-liquid separatio...

Embodiment 2

[0052] A comprehensive recycling process for tin, copper, gold and silver waste, specifically comprising the following steps:

[0053] A. Utilize ball mill to carry out ball milling to tin copper gold and silver waste material, the material is ground;

[0054] B. Heat and dry the material treated by A, the heating temperature is 350°C, and the heating time is 2.5 hours;

[0055] C. roasting the material treated by B in a rotary kiln, the roasting temperature is 550°C, and the roasting time is 3.5 hours;

[0056] D. The materials processed by C are crushed with a Raymond mill, and the materials are thoroughly crushed;

[0057] E. Add distilled water to soak the material treated by D, and add sulfuric acid to adjust the pH of the soaking solution to 1.8, the solid-liquid ratio of soaking is 4:1, and the soaking temperature reaches 85°C by steam heating, and the soaking time is 4.5 hours. Afterwards, it is filtered through a chamber filter press to achieve solid-liquid separati...

Embodiment 3

[0068] A comprehensive recycling process for tin, copper, gold and silver waste, specifically comprising the following steps:

[0069] A. Utilize ball mill to carry out ball milling to tin copper gold and silver waste material, the material is ground;

[0070] B. Heat and dry the material treated by A, the heating temperature is 400°C, and the heating time is 2 hours;

[0071] C. roasting the material treated by B in a rotary kiln, the roasting temperature is 600°C, and the roasting time is 3 hours;

[0072] D. The materials processed by C are crushed with a Raymond mill, and the materials are thoroughly crushed;

[0073] E. Add the material treated by D into distilled water for soaking, and add sulfuric acid to adjust the pH of the soaking solution to 2, the soaking solid-liquid ratio is 3.5:1, and the soaking temperature reaches 90°C by steam heating, and the soaking time is 4 hours. Afterwards, it is filtered through a chamber filter press to achieve solid-liquid separati...

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Abstract

The invention relates to a recovery process, in particular to a comprehensive recovery process for tin-copper-gold-silver waste materials. The comprehensive recovery process for the tin-copper-gold-silver waste materials is comprehensive in product recovery, high in recovery efficiency and not prone to polluting the environment. By means of the comprehensive recovery process, tin, copper, gold and silver in the tin-copper-gold-silver waste materials are extracted out through the steps from A to N. According to the comprehensive recovery process for the tin-copper-gold-silver waste materials, the steps are designed scientifically, the tin-copper-gold-silver waste materials are subjected to the treatment processes of ball milling, drying, roasting and smashing at first, thus, the elements of tin, copper, gold and silver in the tin-copper-gold-silver waste materials are sufficiently separated, and the recover efficiency of the tin-copper-gold-silver waste materials is greatly improved; then, the tin-copper-gold-silver waste materials are subjected to hierarchical extraction separation, and the copper, the tin, the silver and the gold are recovered in sequence; recovery of the waste materials is comprehensive and thorough, wasting is not prone to occurring, and the effects of being comprehensive in product recovery, high in recovery efficiency and not prone to polluting the environment are achieved.

Description

technical field [0001] The invention relates to a recovery process, in particular to a comprehensive recovery process for tin, copper, gold and silver waste. Background technique [0002] Tin is a metal element with symbol Sn, atomic number 50, relative atomic mass 118.71, melting point 231.89°C, boiling point 2260°C, density 7.28g / cm 3 . Tin is a low-melting-point metal with a silver-white metallic luster. Pure tin is soft, has good ductility at room temperature, is chemically stable, and is not easily oxidized. It often maintains a silvery luster. The content of tin in the earth's crust is 0.004%, almost all in the form of tin oxide, in addition to a very small amount of tin sulfide ore. As one of the "hardware" (gold, silver, copper, iron, tin), tin has been used by humans as early as 2000 BC. At present, tin is mainly used in the manufacture of solder, tinplate, alloys, chemical products, etc. The products are widely used in electronics, information, electrical applia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B15/00C22B25/06C22B11/00C25C1/20C22B1/02
CPCC22B1/02C22B7/007C22B11/046C22B15/0071C22B25/06C25C1/20Y02P10/20
Inventor 邱志燕杨勇戴勇曾祥林陈志明
Owner NANKANG HENGYUAN CYCLE TECH CO LTD