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Method for treating selenium alkali residues in antimony pyro-refining

A treatment method, a pyro-refining technology, is applied in the field of antimony pyro-refined selenium-alkali slag, which can solve the problems of large fluctuations in components, no use value, high production cost, etc., and achieve the effect of low processing cost

Active Publication Date: 2013-06-12
锡矿山闪星锑业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solution containing arsenic, alkali and selenium is concentrated and crystallized to obtain a mixed salt containing arsenic, alkali and selenium and sodium hydroxide solution containing selenium. This method has high impurity content, large fluctuations in composition, high production cost, and no use value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Dealkalization by water immersion: take 100kg of selenium alkali slag (containing 25% antimony, 3% arsenic, 0.9% selenium, and 50% sodium hydroxide) from an antimony smelter, crush it, add 300 liters of water, and put it into a 500 liter stainless steel reaction tank During the process, stir, heat with steam, heat the solution to 80°C, react for 80 minutes, and filter to obtain the alkali-containing filtrate and the filter residue containing valuable components; the wet residue weighs 66.58Kg, which contains 19.85% water, and the dry residue contains 45.32% antimony, arsenic 1.19%, selenium 1.58%; filtrate contains sodium hydroxide 155.51 g / l, antimony 1.52 g / l, arsenic 8.15 g / l, selenium 0.19 g / l.

[0019] (2) Purification and alkali extraction: take 100 liters of the filtrate obtained in step , put it into a 150 liter stainless steel reaction tank, heat and stir, raise the temperature to 80°C, add hydrogen peroxide, and react for 30 minutes, until the solution prod...

Embodiment 2

[0022] Take 1000ml of the alkali-containing filtrate obtained in step 1 of Example 1, add 5ml of potassium permanganate solution, stir and heat up to 70°C, react for 40 minutes, filter, wash and dry the filter residue to weigh 3.2g, contain 43.36% antimony, return to smelting The production process recovers valuable metals. Add 5g of sediment agent sodium sulfide to the filtrate, heat up to 70°C, react for 50 minutes, filter to obtain the alkali-containing filtrate and the filter residue containing valuable components, the filter residue has a dry weight of 50.3g, containing 0.25% of antimony, 0.65% of lead, and 16.18% of arsenic , Selenium 0.38%, also return to the smelting production process to recover valuable metals. The alkali-containing filtrate was concentrated, crystallized by cooling, and dried to obtain 159.12 g of sodium hydroxide product, containing 96.12% of sodium hydroxide. Return to the smelting production system for recycling.

[0023] Take 500 g of the dry ...

Embodiment 3

[0025] Take 5Kg of selenium-removing slag from the antimony smelter (containing 25% antimony, 3% arsenic, 0.9% selenium, and 50% sodium hydroxide), crush it, add 20 liters of water to a stainless steel reaction tank, stir and heat up to 70°C, and react for 60 minutes , filtered to obtain alkali-containing filtrate and filter residue containing valuable components, wet residue weight 3.35Kg, water content 19.60%, dry residue containing antimony 44.14%, arsenic 1.20%, selenium 1.59%; filtrate containing sodium hydroxide 116.58 g / l , antimony 3.23 g / l, arsenic 6.10 g / l, selenium 0.12 g / l, first add oxidant to extract antimony, then add sediment agent to remove lead, arsenic and selenium. Then the solution is filtered, settled, concentrated, crystallized, and dried to obtain 2.32Kg of sodium hydroxide, containing 96.50% of sodium hydroxide, which is returned to the smelting production system for recycling.

[0026] Take 300g of dry filter residue, add 33g of charcoal powder, 24g o...

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PUM

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Abstract

The invention discloses a method for treating selenium alkali residues in antimony pyro-refining. The method provided by the invention comprises the following steps of 1, carrying out water immersion dealkalization through mixing water and selenium alkali residues according to a weight ratio of (2 to 5): 1, and carrying out immersion at a temperature of a room temperature to 100 DEG C for 30 to 90 minutes to obtain an alkali-containing filtrate and valuable ingredient-containing filter residues, 2, carrying out purification and alkali extraction of the alkali-containing filtrate through adding an oxidizing agent into the alkali-containing filtrate, filtering to obtain antimony residues and a filtrate containing a small amount of detrimental impurities of arsenic and lead, carrying out precipitation and evaporation concentration of the filtrate to obtain a solid alkali, and feeding back the solid alkali to a smelting production system for recycle, and 3, carrying out smelting separation through adding a reducing agent and a separation agent into the filter residues obtained by the step 2, carrying out reduction smelting to obtain crude antimony and selenium residues, feeding back the crude antimony and the selenium residues to the smelting production system to recover valuable elements. The method provided by the invention has a low treatment cost, realizes comprehensive recovery of various valuable components of selenium alkali residues in antimony pyro-refining, and does not produce three wastes and secondary pollution.

Description

technical field [0001] The invention relates to a treatment method for selenium-containing materials, in particular to a treatment method for selenium-alkali slag refined by antimony fire method. Background technique [0002] Selenium is a scattered metal and a typical semiconductor. It has no separate deposits and is often associated with other metal ore bodies. During mining, smelting, and extraction of various other metals, selenium is removed as an unwanted impurity. The selenium-removing slag of the existing antimony fire refining is in the process of antimony fire refining, adding alkali to oxidize under high temperature conditions, removing selenium from the main metal so that selenium enters the slag, forming antimony, arsenic, selenium, alkali and Selenium alkali slag such as ash. Selenium in selenium alkali slag exists in the form of arsenic selenide, antimony selenide, sodium selenide or lead selenide, all of which are difficult to dissolve in water. Xikuangsha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B30/02
CPCY02P10/20
Inventor 周高阳谈应顺陶雪娥
Owner 锡矿山闪星锑业有限责任公司
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