Mineral separation method of low-grade kieselguhr

A beneficiation method and diatomite technology, which are applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of diatomite quality degradation, acid-containing wastewater, and high beneficiation costs, and achieve the reduction of beneficiation costs. The effect of improving quality and ensuring integrity

Inactive Publication Date: 2015-05-27
沈瑾
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional acid leaching and sulfuric acid roasting diatomite beneficiation technologies have very good results, but the cost of beneficiation is high and acid-containing wastewater is produced, which pollutes the environment; roasting diatomite beneficiation technology can purify diatomite with high ignition loss The effect is good, but the purification effect of diatomite with low loss on ignition is poor
The above methods all need to crush the mined diatomite, and the integrity of the diatoms is destroyed in the crushing process, resulting in a decline in the quality of the purified diatomite.

Method used

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  • Mineral separation method of low-grade kieselguhr

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Effect test

Embodiment 1

[0015] A method for beneficiating low-grade diatomite, comprising the steps of:

[0016] (1) Scrubbing pulping: add 2 times the weight of water and 5% humic acid of diatomite weight to the newly mined low-grade diatomite, then put it into the scrubbing machine and mix and scrub for 30 minutes, and add hexametaphosphoric acid at the same time sodium, to adjust the pH of the slurry to 7.5;

[0017] (2) Primary settlement: After pulping, the mixed pulp enters the primary settling tank for 3 hours of settlement, sand and sand-level coarse soil, complexed and chelated heavy metals settle and enter the wastewater treatment system, diatoms and suspended clay enter Next step;

[0018] (3) Secondary sedimentation: After the primary sedimentation, diatoms and suspended clay enter the secondary sedimentation tank. After settling in the secondary sedimentation tank for 2 hours, the water mixed with suspended clay enters the wastewater treatment system and is treated by the wastewater tre...

Embodiment 2

[0021] A method for beneficiating low-grade diatomite, comprising the steps of:

[0022] (1) Scrubbing pulping: add 2 times the weight of water and 5-8% humic acid of diatomite weight to newly mined low-grade diatomite, then put it into the scrubbing machine and mix and scrub for 40 minutes, and add six diatomites at the same time. Sodium metaphosphate, adjust the pH value of the slurry to 8.0;

[0023] (2) Primary settlement: After pulping, the mixed pulp enters the primary settling tank for 4 hours of settlement, sand and sand-level coarse soil, complexed and chelated heavy metals settle and enter the wastewater treatment system, diatoms and suspended clay enter Next step;

[0024] (3) Secondary sedimentation: After the primary sedimentation, diatoms and suspended clay enter the secondary sedimentation tank. After settling in the secondary sedimentation tank for 3 hours, water mixed with suspended clay enters the wastewater treatment system and is treated by the wastewater ...

Embodiment 3

[0027] A method for beneficiating low-grade diatomite, comprising the steps of:

[0028] (1) Scrubbing and pulping: Add 2 times the weight of water and 5-8% humic acid of diatomite weight to the newly mined low-grade diatomite, then put it into the scrubbing machine and mix and scrub for 37 minutes, and add six diatomites at the same time. Sodium metaphosphate, adjust the pH value of the slurry to 8.5;

[0029] (2) Primary settlement: After pulping, the mixed pulp enters the primary sedimentation tank for 3.5 hours of settlement, sand and sand-level coarse soil, complexed and chelated heavy metals settle and enter the wastewater treatment system, diatoms and suspended clay enter Next step;

[0030] (3) Secondary sedimentation: After the primary sedimentation, diatoms and suspended clay enter the secondary sedimentation tank. After settling in the secondary sedimentation tank for 2.5 hours, the water mixed with suspended clay enters the wastewater treatment system and is treat...

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Abstract

The invention relates to a mineral separation method of non-metallic mine and in particular relates to a mineral separation method of low-grade kieselguhr. The mineral separation method comprises steps of scrubbing pulping, first settling, secondary settling and separation drying. According to the mineral separation method, sodium hexametaphosphate is replaced by humic acid with low cost to be used as a dispersing agent, and the mineral separation cost is reduced. Metallic elements in diatom original soil are subjected to adsorption precipitation in a first settling pool after chelating or chromium complex by the humic acid, and the quality of the kieselguhr is improved. The integrity of diatom is ensured through scrubbing without mechanical pulverization, the yield of mineral separation is maximized, and the quality achieves the optimal level.

Description

technical field [0001] The invention relates to a beneficiation method of non-metallic ore, in particular to a beneficiation method of diatomite. Background technique [0002] China has discovered more than 70 diatomite mines in 14 provinces and regions, with prospective reserves of more than 2 billion tons, but high-quality diatomite reserves are only over 100 million tons. The purification of a large amount of low-grade diatomite becomes diatomite development and utilization. necessary means. [0003] Traditional acid leaching and sulfuric acid roasting diatomite beneficiation technologies have very good results, but the cost of beneficiation is high and acid-containing wastewater is produced, which pollutes the environment; roasting diatomite beneficiation technology can purify diatomite with high ignition loss The effect is good, but the purification effect of diatomite with low loss on ignition is poor. The above methods all need to pulverize the mined diatomite, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00B03B5/28
Inventor 沈瑾
Owner 沈瑾
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