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A method for inhibiting calcium and magnesium in mineral processing

A technology for concentrates and ore, applied in the field of hydrometallurgy and mineral processing, can solve the problems of rising production costs, rising production costs, high sulfate solubility, etc., and achieve the effects of improving grade and recovery rate, increasing output value, and improving grade.

Active Publication Date: 2018-05-08
YUNNAN LUOPING ZINC & ELECTRICITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zinc roasted ore is produced after sulphating and roasting zinc concentrate in fluidized bed furnace. The zinc roasted ore produced is used as raw material for zinc hydrometallurgy. It contains about 4.00wt%~5.00wt% of magnesium oxide and 8.00 wt% of calcium oxide. wt%~13.00wt%; during the zinc leaching process of the raw material with dilute sulfuric acid, more than 90wt% of magnesium oxide and calcium oxide enter the leaching solution in the form of sulfate; due to the low solubility of calcium sulfate, the The impact on zinc production by hydrometallurgy is not great, but it consumes sulfuric acid during leaching, which increases the production cost; magnesium is different, it not only consumes sulfuric acid during leaching, which increases the production cost, but also due to the high solubility of magnesium sulfate, if it is not If it is removed in time by opening the circuit, it will be enriched in the zinc hydrosmelting production system, seriously affecting the production of zinc hydrosmelting

Method used

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  • A method for inhibiting calcium and magnesium in mineral processing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take the mine acquired by our company containing 1.52wt% zinc, 10.13wt% magnesium oxide, 0.0041wt% germanium, 0.11wt% lead, 1.25wt% sulfur, 0.52wt% iron, and 3.15wt% silicon, 20000.00 grams of zinc ore containing calcium oxide 15.48wt% are dried for use;

[0031] 1 Grinding: Grind the dried zinc ore with a dry ball mill until 100wt% of the mineral powder passes through a 160-mesh sieve;

[0032] 2 Slurry: take 15000.0 g of ground mineral powder, and use water slurry to form a slurry with a concentration of 40wt%, and perform a rough separation on it;

[0033] 3 The first roughing: add 300g / t sodium carbonate to prepare a 5wt% aqueous solution as a regulator, make the pulp pH = 6, stir for 2 minutes, add 100g / t activator copper sulfate to prepare a 5wt% aqueous solution, stir for 2 minutes, Add 150g / t of collector butyl xanthate to prepare a 5wt% aqueous solution, stir for 2 minutes, add foaming agent No. 2 oil 50g / t, stir for 1 minute, open the inflation valve, and scr...

Embodiment 2

[0045] Take the mine acquired by our company containing 2.49wt% zinc, 14.96wt% magnesium oxide, 0.0058wt% germanium, 0.19wt% lead, 1.47wt% sulfur, 0.96wt% iron, and 4.96wt% silicon, 25,000.00 g of zinc ore containing 24.96 wt% of calcium oxide was dried for use.

[0046] 1. Grinding: Grind the dried and ready-to-use zinc ore with a dry ball mill until 100wt% of the mineral powder passes through a 160-mesh sieve.

[0047] 2 Slurry: take 20,000.0 g of ground mineral powder, slurry it with water into a slurry with a concentration of 50wt%, and conduct a rough separation on it.

[0048] 3 Primary roughing: add 400g / t sodium carbonate to prepare a 10wt% aqueous solution as a regulator, make the slurry pH=7, stir for 3 minutes, add 150g / t activator copper sulfate to prepare a 10wt% aqueous solution, stir for 3 minutes, add Prepare 200g / t of dixanthate as a 10wt% aqueous solution, stir for 3 minutes, add foaming agent No. 2 oil 60g / t, stir for 2 minutes, open the inflation valve, an...

Embodiment 3

[0060] Take the mine acquired by our company containing 2.09wt% zinc, 14.16wt% magnesium oxide, 0.0048wt% germanium, 0.12wt% lead, 1.37wt% sulfur, 0.86wt% iron, and 4.86wt% silicon, 25000.00 grams of zinc ore containing calcium oxide 23.36wt% was dried for use.

[0061] 1. Grinding: Grind the dried and ready-to-use zinc ore with a dry ball mill until 100wt% of the mineral powder passes through a 160-mesh sieve.

[0062] 2 Slurry: Take 20,000.0 g of ground mineral powder, slurry it with water to form a slurry with a concentration of 45wt%, and conduct a rough separation on it.

[0063] 3 Primary roughing: add 350g / t sodium carbonate to make an 8wt% aqueous solution as a regulator, make the slurry pH=7, stir for 2.5min, add 125g / t activator copper sulfate to prepare an 8wt% aqueous solution, stir for 2.5min, Add 175g / t of collector butyl xanthate to prepare 8wt% aqueous solution, stir for 2.5min, add 55g / t of foaming agent No. 2 oil, stir for 1.5min, open the inflation valve, s...

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Abstract

The invention discloses a method for inhibiting calcium and magnesium in a mineral separation process. According to the method, zinc in zinc ores is separated by flotation in a form of zinc concentrate with a flotation process for 'roughing, scavenging and concentrating'; the method is characterized in that a combined reagent for inhibiting calcium and magnesium is added during concentration; the combined reagent is added as a calcium and magnesium inhibitor in the mineral separation process, the zinc concentrate containing relatively little calcium and magnesium is produced, inhibited calcium and magnesium are discharged along with tailings, and new slag or sewage is not generated; and the calcium and magnesium content of the zinc concentrate is greatly reduced, so that the difficult problem of calcium-magnesium open circuit in wet zinc hydrometallurgy production is solved, the zinc, germanium and sulfur grades and yields of the zinc concentrate can be all increased, and the transport cost of the zinc concentrate is reduced while the production value is increased.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy and mineral processing, and in particular relates to a method for suppressing calcium and magnesium in the mineral processing process. Background technique [0002] The open circuit of traditional zinc and magnesium hydrometallurgy mainly includes the following types: 1. Lime milk neutralization method of zinc electrolysis waste liquid, that is to extract a part of zinc electrolysis waste liquid and use lime milk to neutralize to pH=5.2~5.4 first and then filter , to obtain gypsum slag and filtrate containing about 4wt%~6wt% of zinc. The gypsum slag is stored or sent to the rotary kiln to volatilize and recover zinc. The filtrate is then neutralized with lime milk to pH=7.0~7.5 and filtered to produce zinc About 15wt%~20wt% of basic zinc slag is used as neutralizer and filtrate sent into sewage treatment; this method has long process flow, large zinc loss, high cost, and certain impact on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00
CPCB03D1/00
Inventor 赵德军赵兵伍杨建兴陈长浩徐斌周立雄赵菊华赵保灿李金波王光辉龙国心
Owner YUNNAN LUOPING ZINC & ELECTRICITY
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