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A method for preparing thallium bromide from lead-zinc ore smelting wastewater as raw material

A technology of thallium bromide and lead-zinc ore, which is applied in chemical instruments and methods, inorganic chemistry, gallium/indium/thallium compounds, etc., can solve the problems of waste of thallium resources, and achieve the effect of low cost and simple process

Inactive Publication Date: 2015-08-26
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Recycling is a waste of thallium resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033] The lead-zinc ore smelting wastewater and lead-zinc ore smelting waste residue used in this example are from Guangdong smelters, wherein the thallium content in the lead-zinc ore smelting wastewater is 78mg / L; the lead-zinc ore smelting waste residue contains Fe 2 o 3 40%, Al 2 o 3 10%, SiO 2 25%.

[0034] 1. Preparation of thallium bromide

[0035] (1) Take 10,000ml of lead-zinc ore smelting wastewater, add 20g of lead-zinc ore smelting waste residue and stir for 2 hours, then add lime to adjust the pH value to 8, settle, and collect the bottom sludge;

[0036] (2) Take the bottom mud, dry and pulverize to get 40g of bottom mud powder, add 200ml of lead-zinc ore smelting wastewater, stir for 1h, add sulfuric acid to adjust the pH value to 1, filter to get 150ml of thallium extract;

[0037] (3) Add potassium bromide to the thallium extract until the bromide ion concentration reaches 0.075mol / L, precipitate, and collect the precipitate;

[0038] (4) Dry the collec...

example 2

[0042] The lead-zinc ore smelting waste water and lead-zinc ore smelting waste slag used in this example come from Guangxi smelter, wherein, the thallium content in lead-zinc ore smelting waste water is 76 mg / L; the lead-zinc ore smelting waste slag contains Fe 2 o 3 36%, Al 2 o 3 15%, SiO 2 20%.

[0043] 1. Preparation of thallium bromide

[0044] (1) Take 10,000ml of lead-zinc ore smelting wastewater, add 20g of lead-zinc ore smelting waste residue and stir for 2 hours, then add lime to adjust the pH value to 8, settle, and collect the bottom sludge;

[0045] (2) Take the bottom mud, dry and pulverize to get 40g of bottom mud powder, add 200ml of lead-zinc ore smelting wastewater, stir for 1h, add sulfuric acid to adjust the pH value to 1, filter to get 150ml of thallium extract;

[0046] (3) Add potassium bromide to the thallium extract until the bromide ion concentration reaches 0.05mol / L, precipitate, and collect the precipitate;

[0047] (4) Dry the collected preci...

example 3

[0051] The lead-zinc ore smelting waste water and lead-zinc ore smelting waste slag used in this example are from Hunan Smelter. Among them, the thallium content in the lead-zinc ore smelting waste water is 72 mg / L; the lead-zinc ore smelting waste slag contains Fe 2 o 3 38%, Al 2 o 3 11%, SiO 2 28%.

[0052] 1. Preparation of thallium bromide

[0053] (1) Take 10,000ml of lead-zinc ore smelting wastewater, add 20g of lead-zinc ore smelting waste residue and stir for 2 hours, then add lime to adjust the pH value to 8, settle, and collect the bottom sludge;

[0054] (2) Take the bottom mud, dry and pulverize to get 40g of bottom mud powder, add 200ml of lead-zinc ore smelting wastewater, stir for 1h, add sulfuric acid to adjust the pH value to 1, filter to get 150ml of thallium extract;

[0055] (3) Add potassium bromide to the thallium extract until the bromide ion concentration reaches 0.075mol / L, precipitate, and collect the precipitate;

[0056] (4) Dry the collected pr...

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Abstract

The invention relates to a method for preparing thallium bromide by using lead zinc ore smelting wastewater as a raw material. The method comprises the following steps: (1) adding lead zinc ore smelting waste slags into the lead zinc ore smelting wastewater at a ratio of 1:500(g / ml) of the lead zinc ore smelting waste slags to the lead zinc ore smelting wastewater, stirring for 2 hours, then adding lime to regulate the pH value to be 8-9, precipitating and collecting bottom mud; (2) drying and crushing the bottom mud to obtain bottom mud powder, then adding the lead zinc ore smelting wastewater at a ratio of 1:5(g / ml) of the bottom mud powder to the lead zinc ore smelting wastewater, stirring for 1 hour, then adding sulfuric acid to regulate the pH value to be 1 and filtering to obtain a thallium extract solution; (3) adding potassium bromide into the thallium extract solution until the concentration of potassium ions is 0.05-0.10 mol / L, precipitating and collecting precipitate; and (4) drying the collected precipitate to obtain the TiBr (thallium bromide). The method disclosed by the invention has the advantages of being simple in process and low in cost and using wastes to treat wastes.

Description

Technical field: [0001] The invention relates to the production of metals, in particular to a method for extracting metals from non-ore raw materials. The method is suitable for extracting thallium bromide containing heavy metal thallium from lead-zinc ore smelting wastewater. Background technique: [0002] TlBr (thallium bromide) is a special-purpose chemical raw material for the manufacture of room-temperature nuclear radiation detectors (room-temperature nuclear radiation detectors can work at room temperature, and at the same time have high detection efficiency and relatively high detection efficiency for X-rays. Detectors with good energy resolution) have very broad application prospects in the fields of nuclear medicine, security inspection, environmental monitoring, nuclear weapon penetration, aerospace, industrial flaw detection, and high-energy physics. The raw material of TlBr is usually the chemical reagent TlNO 3 Reaction synthesis with HBr (a solution synthesis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G15/00
Inventor 张平陈绮洁姚焱陈永亨孔曜吴颖娟黄雪夏刘娟
Owner GUANGZHOU UNIVERSITY