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
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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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