Leaching method for recovering lead from lead oxide ores, and its leaching agent

A leaching agent, lead oxide technology, applied in the improvement of process efficiency, photography process, instruments, etc., can solve the problems of instability, low solubility, and inappropriateness, and achieve the effect of low process cost and simple operation.

Inactive Publication Date: 2015-03-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the "three acids" commonly used in industry as solvents are not suitable for wet lead smelting, because the generated PbSO 4 , PbCl 2 The solubility in aqueous solution is small; and the Pb(NO 3 ) 2 Not very stable in aqueous solution, easy to generate volatile nitrogen oxides

Method used

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  • Leaching method for recovering lead from lead oxide ores, and its leaching agent

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Embodiment 1

[0021] The embodiment of the present invention provides a leaching agent for recovering lead in lead oxide ore. The leaching agent is mainly formed by uniformly mixing 5-sulfosalicylic acid and water, and the concentration of 5-sulfosalicylic acid is 0.2mol / L. The oxidized lead ore with a lead grade of 40% is leached, the leaching temperature is 30°C, the weight percentage of the ore particle size is less than 65 μm is 80%, and the leaching agent of 5-sulfosalicylic acid and the lead oxide ore powder are mixed according to the ratio of 20:1 The mass liquid-solid ratio is mixed, fully stirred for 35 minutes, and the leaching rate of lead is about 91.1%.

Embodiment 2

[0023] The embodiment of the present invention provides a leaching agent for recovering lead in lead oxide ore. The leaching agent is mainly formed by uniformly mixing 5-sulfosalicylic acid and water, and the concentration of 5-sulfosalicylic acid is 0.4mol / L. The oxidized lead ore with a lead grade of 47% is leached, the leaching temperature is 35°C, the weight percentage of the ore particle size is less than 65 μm is 85%, and the leaching agent of 5-sulfosalicylic acid and the lead oxide ore powder are mixed according to the ratio of 20:1 The mass liquid-solid ratio is mixed, fully stirred for 45 minutes, and the leaching rate of lead is about 94.8%.

Embodiment 3

[0025] The embodiment of the present invention proposes a leaching method for recovering lead in oxidized lead ore. The method is specifically as follows: crushing and grinding the lead oxide ore with a lead grade of 35%, and the weight percentage of the ore with a particle size of less than 65 μm is 80%; Mix with lead oxide ore powder according to the mass liquid-solid ratio of 15:1, and fully stir for 40 minutes, wherein the leaching temperature is controlled at 25°C; a lead-containing solution suitable for the next step of extraction and electrowinning is obtained. The lead leaching rate is about 96.4%.

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Abstract

The invention belongs to the technical field of mineral metallurgy, and concretely discloses a leaching method for recovering lead from lead oxide ores, and its leaching agent. The method is characterized in that 5-sulfosalicylic acid is used as a leaching agent to leach lead from the lead oxide ores with the lead level of 14-75%, the leaching temperature is 20-60DEG C, lead oxide ores with the granularity of below 65[mu]m account for 70-96% of the weight of the lead oxide ores, the concentration of 5-sulfosalicylic acid is 0.1-0.5mol / L, the 5-sulfosalicylic acid leaching agent is mixed with lead oxide ore powder according to a liquid / solid mass ratio of 5-20:1, and the obtained mixture is fully stirred for 20-60min to obtain a lead-containing solution suitable for later lead extraction and electrodeposition treatment. The leaching agent has a high leaching rate and is simple to prepare, and the method uses 5-sulfosalicylic acid wastes generated in the pharmacy and chemical industry; and the leaching method guarantees the high lead leaching rate without high temperature or a pressurizing device, and also has the advantages of simple operation and low process cost.

Description

technical field [0001] The invention belongs to the technical field of mineral metallurgy, and in particular relates to a leaching method for recovering lead in oxidized lead ore and a leaching agent thereof. Background technique [0002] Lead is an important non-ferrous metal. With the increasing demand for lead metal worldwide, primary lead ore is facing multiple pressures such as shortage of reserves and serious pollution in the dressing and smelting process. In nature, the industrial minerals that can be used to recover lead include lead sulfide minerals and oxide minerals. The lead sulfide minerals are mainly galena (PbS), and the lead oxide minerals are mainly white plumbite (PbCO 3 ). Lead sulfide minerals have good floatability, and concentrates can be easily obtained by flotation. As the resources of high-grade lead sulfide ore are decreasing, lead oxide ore has become an important resource for lead recovery. Compared with lead sulfide minerals, oxide minerals ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B13/00C25C1/18
CPCY02P10/20
Inventor 邓久帅吴丹丹文书明王聪聪张英曹沁波贾陆和
Owner KUNMING UNIV OF SCI & TECH
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