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Method for preparing high-grade stannous chloride by utilizing low-tin waste slag

A technology of stannous chloride and tin waste residue, applied in the directions of stannous chloride, tin halide and the like, can solve the problems of low recovery rate and the like, and achieve the effects of low cost, environmental friendliness and simple process

Active Publication Date: 2016-08-24
GUANGXI HUAXI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of low-tin-containing materials can only be processed by pyrometallurgy, and the recovery rate is low, which brings large economic losses. To prepare low-tin waste slag into high-grade stannous chloride, the matching requirements for reaction parameters and purification parameters Very accurate, there is no research report on the preparation of high-grade stannous chloride by using low-tin waste slag

Method used

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  • Method for preparing high-grade stannous chloride by utilizing low-tin waste slag
  • Method for preparing high-grade stannous chloride by utilizing low-tin waste slag
  • Method for preparing high-grade stannous chloride by utilizing low-tin waste slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of method utilizing low-tin waste slag to prepare excellent grade tin protochloride, comprises the following steps:

[0025] (1) Prepare reaction solution: take 200kg of low-tin waste residue and put it into 2m 3 Add 500L of water and mix uniformly, then add 300L of concentrated hydrochloric acid with a mass percentage of 37.5% to adjust the acidity to 3g / L; the low-tin waste slag is the waste slag produced in the process of producing tin processed products;

[0026] (2) Chlorine: feed chlorine gas into the reaction solution, and wait for the Sn in the reaction solution to 4+ Stop passing chlorine when the content reaches 450g / L;

[0027] (3) Settling: the reaction solution after passing chlorine is left to settle, and the settling time is 24h, and the supernatant is taken;

[0028] (4) Secondary sedimentation: the supernatant was left to settle for the second time, and the sedimentation time was 24 hours to obtain the second supernatant;

[0029] (5) Filtrati...

Embodiment 2

[0037] A kind of method utilizing low-tin waste slag to prepare excellent grade tin protochloride, comprises the following steps:

[0038] (1) Prepare reaction solution: take 200kg of low-tin waste residue and put it into 2m 3 Add 500L of water and mix uniformly, then add 300L of concentrated hydrochloric acid with a mass percentage of 37.5% to adjust the acidity to 3g / L; the low-tin waste slag is the waste slag produced in the process of producing tin processed products;

[0039] (2) Chlorine: feed chlorine gas into the reaction solution, and wait for the Sn in the reaction solution to 4+ Stop passing chlorine when the content reaches 450g / L;

[0040] (3) Settling: the reaction solution after passing chlorine is left to settle, and the settling time is 24h, and the supernatant is taken;

[0041] (4) Secondary sedimentation: the supernatant was left to settle for the second time, and the sedimentation time was 24 hours to obtain the second supernatant;

[0042] (5) Filtrati...

Embodiment 3

[0050] A kind of method utilizing low-tin waste slag to prepare excellent grade tin protochloride, comprises the following steps:

[0051] (1) Prepare reaction solution: take 200kg of low-tin waste residue and put it into 2m 3 Add 500L of water and mix uniformly, then add 300L of concentrated hydrochloric acid with a mass percentage of 37.5% to adjust the acidity to 3g / L; the low-tin waste slag is the waste slag produced in the process of producing tin processed products;

[0052] (2) Chlorine: feed chlorine gas into the reaction solution, and wait for the Sn in the reaction solution to 4+ Stop passing chlorine when the content reaches 450g / L;

[0053] (3) Settling: the reaction solution after passing chlorine is left to settle, and the settling time is 24h, and the supernatant is taken;

[0054] (4) Secondary sedimentation: the supernatant was left to settle for the second time, and the sedimentation time was 24 hours to obtain the second supernatant;

[0055] (5) Filtrati...

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Abstract

The invention discloses a preparation method of premium-grade stannous chloride from low-tin waste residues. The invention comprises the following steps: preparing a reaction solution, introducing chlorine, settling, settling for a second time, filtrating, concentrating, freeze crystallization and solid-liquid separation, wherein the obtained solid is the premium-grade stannous chloride. According to the invention, low-tin waste residues produced in tin manufacturing process are used as raw materials, various indexes of the stannous chloride product are controlled through acidity, concentration and time, and multiple setting, filtering and concentrating are performed to remove impurities, so as to obtain premium-grade stannous chloride products. The preparation method disclosed by the invention is simple in process, low in cost and environmentally friendly, provides a new way for recycling of low-tin waste residues produced in a tin manufacturing process and satisfies requirements of circular economy.

Description

technical field [0001] The invention belongs to the field of waste slag recycling, and in particular relates to a method for preparing high-grade stannous chloride by using low-tin waste slag. Background technique [0002] Stannous chloride (SnCl 2 2H 2 O) Wide range of uses, used in dyes, spices, mirrors, electroplating and other industries; and used as ultra-high pressure lubricating oil, bleaching agent, used as reducing agent, mordant, decolorizing agent and analytical reagent, used for silver, arsenic, molybdenum, Mercury Determination. [0003] The method for preparing tin protochloride at present adopts high-purity metal tin as raw material more, and the cost of product is higher, and the quality of existing metal tin product is uneven, can be used as raw material supplier domestic only one or two, and supply resource is insufficient, It often leads to the inability of continuous production in tin processing plants. Therefore, reducing the utilization of metal tin ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/06
CPCC01G19/06
Inventor 林成旭叶有明阮桦农永萍杨育兵王运龙荣贵能宾家勇黎平义
Owner GUANGXI HUAXI GRP CO LTD
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