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Method for combined treatment of high calcium and magnesium low-grade oxidized lead zinc ore by means of concentration

A combination of dressing and smelting, lead and zinc oxide technology, applied in the processing of ore, in the field of combined dressing and smelting of high-calcium-magnesium and low-grade lead-zinc oxide ore, it can solve problems such as difficult separation, and achieve improved recovery and good selectivity , the effect of improving the recovery rate

Inactive Publication Date: 2009-09-16
KUNMING UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0006] The present invention fully considers the difference in physical properties between lead-zinc oxide ore and sulfide-lead-zinc ore in the ore, and adopts the method of "first smelting and then separation" of recovering zinc oxide minerals by ammonia soaking wet metallurgical process, and then recovering lead-zinc sulfide minerals by flotation process. "The new technology of combined treatment" solves the problem of difficult separation of high-calcium-magnesium and low-grade lead-zinc oxide ore, and uses the organic combination of mineral processing and hydrometallurgy to maximize strengths and avoid weaknesses. It not only gives full play to the advantages of hydrometallurgical treatment of zinc oxide ore, but also The advantages of flotation recovery of lead-zinc sulfide ore, realize the overall optimization of the dressing and smelting process, greatly increase the recovery rate, and achieve the overall effect of improving resource utilization and energy saving and consumption reduction

Method used

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  • Method for combined treatment of high calcium and magnesium low-grade oxidized lead zinc ore by means of concentration

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Experimental program
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Effect test

Embodiment 1

[0028] The raw ore composition of lead-zinc oxide treated: Zn 10.26%, Pb 2.03%, Fe 18.50%, CaO21.35%, MgO 0.55%, SiO 2 13.71%, zinc oxidation rate 84.93%.

[0029] Above-mentioned raw ore is passed through following processing steps:

[0030] (1) Wet ore crushing and grinding of raw ore to a pulp with a fineness of less than 74 μm, accounting for 70%;

[0031] (2) Add ammonia water and ammonium bicarbonate to the above-mentioned grinding pulp until the total ammonia concentration of the pulp is 6mol / L, wherein the molar concentration ratio of ammonia and ammonium salt is 2:1, and the liquid-solid ratio of the pulp is controlled to be 3:1, according to The amount of raw ore is 200g / t, the activator hydrofluoric acid (HF) is added to the pulp, stirred and leached for 2 hours, and after solid-liquid separation, leachate and leaching residue are obtained;

[0032] (3) adding volume ratio in above-mentioned leaching solution is: 15% 2-hydroxyl-5 nonyl-benzaldehyde oxime, 10% iso...

Embodiment 2

[0038] Lead-zinc oxide ore ore composition: Zn 9.12%, Pb 1.94%, Fe 16.25%, CaO 24.57%, MgO 0.65%, SiO 2 21.52%. The zinc oxidation rate is 45.38%.

[0039] The above-mentioned raw ore is subjected to the following process steps:

[0040] (1) Wet crushing and grinding the raw ore to a pulp with a fineness of less than 74 μm accounting for 90%;

[0041] (2) Ammonia water and ammonium carbonate were added to the above-mentioned grinding ore pulp until the total ammonia concentration of the ore pulp was 3 mol / L, wherein the molar concentration ratio of ammonia and ammonium salt was 2: 1, and the liquid-solid ratio of the controlled ore slurry was 3: 1, according to 80g / t amount of raw ore, add activator hydrofluoric acid to the pulp, stir and leaching for 2 hours, after solid-liquid separation, obtain leaching solution and leaching slag;

[0042] (3) adding volume ratio in above-mentioned leach liquor is: 5% 2-hydroxy-5 nonyl-benzaldehyde oxime, 5% C5-9 mixed alcohol, 90% avi...

Embodiment 3

[0048] Lead-zinc oxide ore composition: Zn 15.36%, Pb 2.85%, Fe 13.19%, CaO 26.48%, MgO 0.74%, SiO 2 19.47%. The zinc oxidation rate is 64.33%.

[0049] The above-mentioned raw ore is subjected to the following process steps:

[0050] (1) Wet crushing and grinding the raw ore to a pulp with a fineness of less than 74 μm accounting for 85%;

[0051] (2) Add ammonia water and ammonium sulfate to the above-mentioned grinding pulp until the total ammonia concentration of the pulp is 4.5mol / L, wherein the molar concentration ratio of ammonia and ammonium salt is 2:1, and the control ore slurry liquid-solid ratio is 4:1, press The amount of 150g / t raw ore, add the activator hydrofluoric acid to the pulp, stir and leaching for 1 hour, after the solid-liquid separation, the leaching solution and the leaching slag are obtained;

[0052] (3) adding volume ratio in above-mentioned leach liquor is: 10% 2-hydroxy-5 nonyl-benzaldehyde oxime, 10% C5-9 mixed alcohol, 80% aviation kerosene...

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Abstract

The invention provides a method for combined treatment of high calcium and magnesium low-grade oxidized lead zinc ore by means of concentration, comprising the processing techniques of ammonia leaching under normal temperature and pressure-extraction-electrodeposition-leaching floatation, which not only gives full play to the advantage of wet method melting technique in recovering zinc in the oxidized lead zinc ore but also gives full play to the advantage of floatation technique in recovering vulcanized lead zinc; what is more, the advantages in the two aspects are organically combined and have shared complementary advantages, thus realizing integrated optimization of concentration technique, forming a brand-new combined process for concentration of low-grade zinc oxide ore, improving recovery rate of lead and zinc metal and achieving the effect of improving resource utilization rate and saving energy, lowering energy consumption and reducing pollutants discharge on the whole.

Description

technical field [0001] The invention relates to an ore processing method, in particular to a method for combined dressing and smelting of high-calcium-magnesium and low-grade lead-zinc oxide ore, which belongs to the technical field of mineral processing. Background technique [0002] At present, my country is the largest country in the production and consumption of zinc metal in the world, and the average annual demand growth rate has reached 16.2% in recent years. However, the contradiction between supply and demand is prominent, and about 1 / 3 of zinc raw materials need to be imported. The reserves of zinc oxide ore in the world are huge. According to the statistics of the U.S. Geological Survey (G.A.Norton, C.G.Groat.Mineral Commoditysummaries 2004.Washington: U.S.Government Printing office, 2004.p188-189), the zinc metal reserves in zinc oxide ore in the world are about 10120 tons. The reserves of zinc metal in zinc oxide ore in my country are about 28 million tons. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
Inventor 张文彬胡显智刘殿文字富庭孙力军章晓林方建军张景绘李明晓魏志聪徐翔许炳梁
Owner KUNMING UNIV OF SCI & TECH
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