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Wet-process refined selenium refining process taking lead-zinc smelting acid mud as raw material

An acid sludge, lead and zinc technology, applied in the field of mineral smelting, can solve the problems of large amount of flue gas, affecting the popularization and application of pyrotechnic selenium extraction process, high energy consumption, reducing dust and flue gas, reducing workload and pollutants Emissions, the effect of simple process flow

Inactive Publication Date: 2021-06-25
济源市孝远实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fire selenium extraction process also has problems such as large amount of flue gas and easy generation of SO 2 and SeO 2 Toxic gas, high energy consumption and other problems, the above defects seriously affect the further popularization and application of pyro-selenium extraction process

Method used

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  • Wet-process refined selenium refining process taking lead-zinc smelting acid mud as raw material

Examples

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Effect test

Embodiment 1

[0028] The invention provides a process for refining selenium by wet process with lead-zinc smelting acid mud as raw material, and its process flow is as follows figure 1 As shown, the following steps are included: (1), raw material processing: the lead-zinc smelting acid mud and quicklime are proportioned by mass, and the mass ratio range is 1:7, and 100g of acid mud and 700g of quicklime are weighed and uniformly mixed in a mixer Mixing, the main components in the acid mud are calculated as (%) by mass percentage: Pb36.31, Se35.24, Hg11.24, Fe10.37, Zn6;

[0029] (2) Granulation: Put the mixed material into a granulator to make small balls with a diameter of 7mm; through granulation, the dust generated during the baking process can be reduced, thereby reducing the generation of mercury soot, improving the production rate of live mercury and Smelting mercury direct recovery rate;

[0030] (3) Mercury removal by roasting: the granulated material is roasted in a rotary kiln un...

Embodiment 2

[0051] The present invention provides a process for refining selenium by wet process using lead-zinc smelting acid mud as a raw material. The reaction equation involved in this embodiment is consistent with that in Embodiment 1, and will not be repeated here. Concretely comprise the following steps: (1), raw material processing: with lead-zinc smelting acid mud and quicklime according to mass ratio, the mass ratio range is 1:7, take by weighing 100g acid mud and 700g quicklime and mix uniformly in the mixer, The main components in the acid mud are calculated as (%) by mass percentage: Pb36.31, Se35.24, Hg11.24, Fe10.37, Zn6;

[0052] (2) Granulation: Put the mixed material into a granulator to make small balls with a diameter of 7mm; through granulation, the dust generated during the baking process can be reduced, thereby reducing the generation of mercury soot, improving the production rate of live mercury and Smelting mercury direct recovery rate;

[0053] (3) Mercury remov...

Embodiment 3

[0064] The present invention provides a process for refining selenium by wet process using lead-zinc smelting acid mud as a raw material. The reaction equation involved in this embodiment is consistent with that in Embodiment 1, and will not be repeated here. Concretely comprise the following steps: (1), raw material processing: with lead-zinc smelting acid mud and quicklime according to mass ratio, the mass ratio range is 1:7, take by weighing 100g acid mud and 700g quicklime and mix uniformly in the mixer, The main components in the acid mud are (%) by mass percentage: Pb36.31, Se35.24, Hg11.24, Fe10.37, Zn6.

[0065] (2) Granulation: Put the mixed material into a granulator to make small balls with a diameter of 7mm; through granulation, the dust generated during the baking process can be reduced, thereby reducing the generation of mercury soot, improving the production rate of live mercury and Smelting mercury direct recovery rate.

[0066] (3) Mercury removal by roasting...

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Abstract

The invention provides a wet-process refined selenium refining process taking lead-zinc smelting acid mud as a raw material. The wet-process refined selenium refining process sequentially comprises the steps of raw material treatment, granulation, roasting for mercury removal, sulfuric acid leaching, crude selenium recovery, refined selenium preparation (a, heating reaction; b, cooling precipitation; c, acidification; d, washing; and e, drying) and the like. According to the method, a pyrogenic process mercury removal process and a wet process selenium extraction process are combined, the acid mud generated in the lead and zinc smelting process is taken as a raw material, the refined selenium is extracted by a wet process after calcium is added, selenium is fixed and mercury is removed, and the finished selenium product with the purity of 99% or above is extracted through raw material treatment, granulation, roasting mercury removal, sulfuric acid leaching, crude selenium recovery and refined selenium preparation. Meanwhile, the process has the advantages of low auxiliary material loss and production cost, simplicity in operation, low labor intensity, less smoke and dust, cleanness, environment friendliness and high economic benefit.

Description

technical field [0001] The invention provides a process for refining refined selenium by wet method using lead-zinc smelting acid mud as a raw material, belonging to the technical field of mineral smelting. Background technique [0002] The content of selenium in the earth's crust is very small and the distribution is scattered. Most of selenium is recovered from the by-products of copper ore processing, but selenium is widely used in electronics, glass, metallurgy, chemical industry, medical care, agriculture and other fields. Selenium has photosensitivity and semiconductor characteristics, and is often used in the electronics industry to manufacture photocells, photoreceptors, laser devices, infrared controllers, photocells, photoresistors, optical instruments, photometers, rectifiers, etc. The application of selenium in the field of electronics industry accounts for about 30% of the total demand. High-purity selenium (99.99%) and selenium alloys are the main light-absorbi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/02
CPCC01B19/02
Inventor 夏龙斌叶涌涛刘涛
Owner 济源市孝远实业有限公司
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