阅读说明：本技术 一种含锡物料的氧压碱浸钙盐沉锡的综合回收法 (Comprehensive recovery method for tin precipitation of tin-containing material by oxygen pressure alkaline leaching of calcium salt ) 是由 刘罗平 于 2020-10-23 设计创作，主要内容包括：本发明公开了一种含锡物料的氧压碱浸钙盐沉锡的综合回收法,其特征在于,包括如下步骤：步骤一、将把含锡物料粉碎得到粉碎后物料；步骤二、向浆化釜中加入底水、粉碎后物料、片碱形成浸出液,反应1小时得到反应物料；步骤三、将浆化釜内的反应物料加入到加压釜反应；步骤四、压滤得到滤液和滤渣；步骤五、滤渣漂洗后用酸法浸出提取里面的铟；步骤六、滤液加过氧化氢氧化除锑；步骤七、含锑渣做成锑白回收锑；含锡滤液加入石灰,压滤,得到锡酸钙滤渣和碱性滤液。本发明提高了含锡物料的综合回收率和综合回收效益,使得含锡物料中的有价金属产品化,提高了产品收益,降低了环境污染。(The invention discloses a comprehensive recovery method for tin deposition of a tin-containing material by oxygen pressure alkaline leaching of calcium salt, which is characterized by comprising the following steps: step one, crushing a tin-containing material to obtain a crushed material; step two, adding bottom water, crushed materials and caustic soda flakes into a slurrying kettle to form a leaching solution, and reacting for 1 hour to obtain a reaction material; step three, adding the reaction materials in the slurrying kettle into a pressurized kettle for reaction; step four, filter pressing to obtain filtrate and filter residues; step five, leaching and extracting indium in filter residues by using an acid method after the filter residues are rinsed; step six, adding hydrogen peroxide into the filtrate to oxidize and remove antimony; seventhly, preparing antimony-containing slag into antimony white and recovering antimony; adding lime into the tin-containing filtrate, and performing filter pressing to obtain calcium stannate filter residue and alkaline filtrate. The invention improves the comprehensive recovery rate and the comprehensive recovery benefit of the tin-containing material, leads valuable metals in the tin-containing material to be commercialized, improves the product income and reduces the environmental pollution.)

1. A comprehensive recovery method for tin precipitation of tin-containing materials by oxygen pressure alkaline leaching of calcium salts is characterized by comprising the following steps:

step one, crushing a tin-containing material, and sieving to obtain a crushed material;

step two, adding 0.2A kg of water into a slurrying kettle to serve as bottom water, then adding A kg of crushed materials into the slurrying kettle, adding 0.15A-0.25A kg of caustic soda flakes into the slurrying kettle to form leachate, and reacting for 1 hour to obtain reaction materials;

thirdly, adding the reaction materials in the slurrying kettle into a pressure kettle, pressurizing to 0.5-0.8 MPa, heating to 120-150 ℃ and reacting for 3 hours;

step four, releasing pressure and cooling, then transferring the materials in the pressurizing kettle into a transfer kettle and adding water to obtain a solid-liquid mixture for filter pressing, and obtaining filtrate and filter residues;

step five, leaching and extracting indium in filter residues by using an acid method after the filter residues are rinsed;

step six, adding hydrogen peroxide into the filtrate to oxidize and remove antimony, and performing filter pressing to obtain antimony-containing slag and tin-containing filtrate; wherein the adding mass of the hydrogen peroxide is 10-20% of the mass content of antimony in the filtrate;

seventhly, preparing antimony-containing slag into antimony white and recovering antimony; adding lime into the tin-containing filtrate, and performing filter pressing to obtain calcium stannate filter residues and alkaline filtrate; and returning the alkaline filtrate to the leaching solution obtained in the step two.

2. The comprehensive recovery method for the tin precipitation of the tin-containing material by the oxygen pressure alkaline leaching of calcium salt according to claim 1, characterized in that the lime is lime milk, and the mass of the added lime milk is 3 to 3.5 times of the mass of the tin element.

3. The comprehensive recovery method for the precipitation of tin by the oxygen pressure alkaline leaching of calcium salt of tin-containing materials as claimed in claim 1, characterized in that the flake caustic soda is uniformly added into the slurrying kettle through a screw feeder.

4. The process for comprehensively recovering tin from a tin-containing material by the precipitation of tin by alkaline leaching of calcium salt under oxygen pressure as claimed in claim 1, wherein the tin-containing material is pulverized and then passed through a 150-mesh sieve.

5. The comprehensive recovery method for tin precipitation by oxygen pressure alkaline leaching of calcium salt of tin-containing materials according to claim 1, characterized in that in the fourth step, the liquid-solid mass ratio in the solid-liquid mixture is 5: 1.

Technical Field

The invention belongs to the field of machinery, and particularly relates to a comprehensive recovery method for tin precipitation of tin-containing materials by using oxygen pressure alkaline leaching of calcium salts.

Background

At present, the comprehensive recovery of tin-containing materials, especially tin anodes, is not ideal in China, the main method is a normal-pressure acid leaching method, the leaching rate is not high, various valuable metals are not thoroughly separated, and the valuable metals are converted into products and are harmless, so that the comprehensive recovery efficiency and the benefit are not ideal.

Specifically, at present, tin-containing materials, especially tin anode slime, are generally leached by an acid method in China, and the leaching rate is not high because 4-valent tin and 5-valent antimony are insoluble in acid. And various soluble metals can be immersed into the solution during acid leaching, so that the time and cost are wasted for separating various valuable metals.

Disclosure of Invention

In order to solve the problems, the invention provides a comprehensive recovery method for tin precipitation of tin-containing materials by calcium salt leaching under oxygen pressure and alkali. The invention improves the comprehensive recovery rate and the comprehensive recovery benefit of the tin-containing material, leads valuable metals in the tin-containing material to be commercialized, improves the product income and reduces the environmental pollution.

A comprehensive recovery method for tin precipitation of tin-containing materials by oxygen pressure alkaline leaching of calcium salts is characterized by comprising the following steps:

step one, crushing a tin-containing material, and sieving the crushed material by a 150-mesh sieve to obtain a crushed material;

step two, adding 0.2A kg of water into a slurrying kettle to serve as bottom water, then adding A kg of crushed materials into the slurrying kettle, uniformly adding 0.15A-0.25A kg of caustic soda flakes into the slurrying kettle through a screw feeder to form a leaching solution, and reacting for 1 hour to obtain a reaction material;

thirdly, adding the reaction materials in the slurrying kettle into a pressure kettle, pressurizing to 0.5-0.8 MPa, heating to 120-150 ℃ and reacting for 3 hours;

step four, releasing pressure and cooling, then transferring the materials in the pressurizing kettle into a transfer kettle and adding water to obtain a solid-liquid mixture for filter pressing, and obtaining filtrate and filter residues;

step five, leaching and extracting indium in filter residues by using an acid method after the filter residues are rinsed;

step six, adding hydrogen peroxide into the filtrate to oxidize and remove antimony, and performing filter pressing to obtain antimony-containing slag and tin-containing filtrate; wherein the adding mass of the hydrogen peroxide is 10-20% of the mass content of antimony in the filtrate;

seventhly, preparing antimony-containing slag into antimony white and recovering antimony; adding lime into the tin-containing filtrate, and performing filter pressing to obtain calcium stannate filter residues and alkaline filtrate; and returning the alkaline filtrate to the leaching solution obtained in the step two.

In a further improvement, the lime is lime milk, and the mass of the added lime milk is 3 to 3.5 times of the mass of the tin element.

In a further improvement, the flake caustic soda is uniformly added into a slurrying kettle through a screw feeder.

In a further improvement, the tin-containing material is crushed and then sieved by a 150-mesh sieve.

In the fourth step, the mass ratio of liquid to solid in the solid-liquid mixture is 5: 1.

The invention has the advantages that:

the invention improves the comprehensive recovery rate and the comprehensive recovery benefit of the tin-containing material, leads valuable metals in the tin-containing material to be commercialized, improves the product income and reduces the environmental pollution.

Drawings

FIG. 1 is a schematic flow chart of the present invention.

Detailed Description

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

The comprehensive recovery method for the tin precipitation of the tin-containing material by the oxygen pressure alkaline leaching of calcium salt is characterized by comprising the following steps of:

step one, crushing a tin-containing material, and sieving to obtain a crushed material;

step two, adding 0.2A kg of water into a slurrying kettle to serve as bottom water, then adding A kg of crushed materials into the slurrying kettle, adding 0.15A-0.25A kg of caustic soda flakes into the slurrying kettle to form leachate, and reacting for 1 hour to obtain reaction materials;

thirdly, adding the reaction materials in the slurrying kettle into a pressure kettle, pressurizing to 0.5-0.8 MPa, heating to 120-150 ℃ and reacting for 3 hours;

step four, releasing pressure and cooling, then transferring the materials in the pressurizing kettle into a transfer kettle and adding water to obtain a solid-liquid mixture for filter pressing, and obtaining filtrate and filter residues; the mass ratio of liquid to solid in the solid-liquid mixture is 5: 1;

step five, leaching and extracting indium in filter residues by using an acid method after the filter residues are rinsed; the acid leaching process is shown in patent 201810745516.7.

Step six, adding hydrogen peroxide into the filtrate to oxidize and remove antimony, and performing filter pressing to obtain antimony-containing slag and tin-containing filtrate; wherein the adding mass of the hydrogen peroxide is 10-20% of the mass content of antimony in the filtrate;

seventhly, preparing antimony-containing slag into antimony white and recovering antimony; adding lime milk into the tin-containing filtrate, and performing filter pressing to obtain calcium stannate filter residue and alkaline filtrate; and returning the alkaline filtrate to the leaching solution obtained in the step two. The mass of the added lime milk is 3 to 3.5 times of the mass of the tin element.

The above description is only one specific guiding embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modification of the present invention using this concept shall fall within the scope of the invention.