A kind of treatment method of high-silicon zinc roasted ore

A treatment method and technology of zinc roasting, which is applied in the field of high silicon zinc roasting, can solve the problem of high cost of processing high silicon zinc concentrate, achieve the effect of reducing zinc leaching slag rate, quick effect, and improving leaching rate

Active Publication Date: 2021-11-09
云南云铜锌业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art above, the object of the present invention is to provide a treatment method for high-silicon-zinc roasted ore, aiming to solve the problem of high cost in the existing hydrometallurgy process for processing high-silicon-zinc concentrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A roasted ore is provided: by weight percentage, the roasted ore contains 55.01% zinc, 0.56% copper, and SiO 2 4.00%;

[0065] Prepare neutral pre-leaching solution: use sulfuric acid and ferrous sulfate to prepare neutral pre-leaching solution, and add excess manganese dioxide powder to oxidize iron to trivalent; the neutral pre-leaching solution contains 80g / L of acid and 1.0 g of iron g / L;

[0066] Neutral leaching: The neutral leaching solution and roasted ore are subjected to leaching reaction in 5 continuous reaction tanks to obtain neutral leaching pulp; among them, the reaction time is 2 hours, and the pH values ​​at the outlets of the first 4 continuous reaction tanks are respectively controlled to 3.8, 3.9, 3.9, 4.0, the pH at the outlet of the last tank is controlled to 4.2, and the neutral leached pulp is used for settling experiments to obtain the middle supernatant and middle bottom flow. After 5 minutes of settlement, the middle and supernatant rate is 8...

Embodiment 2

[0071] A roasted ore is provided: by weight percentage, the roasted ore contains 52.63% zinc, 1.03% copper, and SiO 2 5.55%;

[0072] Prepare neutral pre-leaching solution: use sulfuric acid and ferrous sulfate to prepare neutral pre-leaching solution, and add excess manganese dioxide powder to oxidize iron to trivalent; the neutral pre-leaching solution contains 75g / L of acid and 1.2% iron. g / L;

[0073] Neutral leaching: The neutral leaching solution and roasted ore are subjected to leaching reaction in 5 continuous reaction tanks to obtain neutral leaching pulp; among them, the reaction time is 2 hours, and the pH values ​​at the outlets of the first 4 continuous reaction tanks are respectively controlled to 3.8, 4.0, 4.0, 4.1, the pH at the outlet of the last tank was controlled to 4.3, and the neutral leached pulp was used for settling experiments to obtain the middle supernatant and middle bottom flow. After 5 minutes of settlement, the middle and supernatant rate was 8...

Embodiment 3

[0078] A roasted ore is provided: by weight percentage, the roasted ore contains 53.76% zinc, 0.61% copper, and SiO 2 6.68%;

[0079] Prepare neutral pre-leaching solution: use sulfuric acid and ferrous sulfate to prepare neutral pre-leaching solution, and add excess manganese dioxide powder to oxidize iron to trivalent; the neutral pre-leaching solution contains 70g / L of acid and 1.5% iron g / L;

[0080] Neutral leaching: The neutral leaching solution and roasted ore are subjected to leaching reaction in 5 continuous reaction tanks to obtain neutral leaching pulp; among them, the reaction time is 2 hours, and the pH values ​​at the outlets of the first 4 continuous reaction tanks are respectively controlled to 3.9, 4.0, 4.0, 4.1, the pH at the outlet of the last tank was controlled to 4.3, and the neutral leached pulp was used for settling experiments to obtain the middle supernatant and middle bottom flow. After 5 minutes of settlement, the middle and supernatant rate was 80...

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Abstract

The invention discloses a treatment method for high-silicon zinc roasted ore, which comprises: preparing a neutral leaching pre-liquid; performing neutral leaching on the leaching pre-liquid and roasted ore to obtain a neutral leaching pulp; After adding the first flocculant to the ore pulp, it enters the first thickener for processing to obtain the middle supernatant and the middle bottom flow; the middle bottom flow is mixed with the electrolytic waste liquid, and the first oxidant is added to carry out weak acid leaching to obtain the weak acid leached ore pulp; Low-acid leaching of the weak-acid leaching pulp and electrolytic waste liquid to obtain low-acid leaching pulp; adding a second flocculant to the low-acid leaching pulp, and then entering a second thickener for treatment to obtain acid supernatant and acid underflow; After the acid bottom stream is filtered, a zinc leaching residue is obtained. The invention solves the problems of difficult settlement of neutral leached pulp, low medium and supernatant rate and high cost during the existing high-silicon-zinc roasted ore treatment.

Description

technical field [0001] The invention relates to the field of hydrometallurgy zinc technology, in particular to a method for processing high-silicon zinc roasted ore. Background technique [0002] In the conventional zinc hydrometallurgy process, the zinc roasted ore is firstly leached by neutrality, and the middle supernatant and the middle bottom flow are produced, and the middle bottom flow is then leached with a weak acid, and the produced zinc leaching slag is defired, and the liquid is returned to the middle after the weak acid leaching. Sexual leaching as its precursor solution. The silicon content of zinc baked ore is usually lower than 3%, and the increase of silicon content will lead to difficulty in the settlement of neutral leached pulp, and the low supernatant rate will seriously affect the production of subsequent processes. At the same time, the leaching rate of valuable metals is low, and the zinc leaching residue The slag rate is high, which seriously increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/04C22B3/06C22B3/44C22B19/20C02F9/00C02F103/16
CPCC02F1/001C02F1/52C02F1/72C02F9/00C02F2001/007C02F2103/16C22B3/04C22B3/06C22B3/44C22B19/20C22B19/22Y02P10/20
Inventor 吴钧陈国木杨全胜周中华李国峰王娜吴海艳施洪波李洪福刘建平张少博高文键
Owner 云南云铜锌业股份有限公司
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