Dry-wet-method mineral separation method used for African sandy diatomite ore

A beneficiation method and technology of diatomite ore, which is applied in the field of dry and wet beneficiation of sandy diatomite ore in Africa, can solve the problems that it is difficult to apply ultra-low-grade sandy diatomite ore to beneficiation and purification, and achieve stable equipment High reliability and reliability, high recovery rate of diatoms and stable quality

Inactive Publication Date: 2015-12-16
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The invention provides a dry-wet method for beneficiation of sandy diatomite ore in Africa to solve the technical problem that the

Method used

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  • Dry-wet-method mineral separation method used for African sandy diatomite ore
  • Dry-wet-method mineral separation method used for African sandy diatomite ore
  • Dry-wet-method mineral separation method used for African sandy diatomite ore

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Embodiment 1

[0070] This embodiment will introduce a specific implementation process of the dry and wet method for beneficiation of sandy diatomite ore in Africa. This process includes two parts, one part is the dry separation process, and the other part is the dry separation process. The results were wet sorted.

[0071] Please refer to image 3 , the dry sorting process comprises the following steps:

[0072] Step S301: Obtain diatomite raw ore with a particle size of less than 200mm;

[0073] Step S302: crushing diatomite raw ore to obtain diatomite mineral powder, the particle size of diatomite mineral powder is less than or equal to 10mm;

[0074] Step S303: After obtaining the diatomite mineral powder, the diatomite mineral powder can be further pulverized and dispersed, and the particle size of the dispersed diatomite mineral powder is ≤1mm;

[0075] Step S304: Carry out dry sorting, the result of dry sorting includes dry classified crude product and dry classified fine product, ...

Embodiment 2

[0090] 2000kg (moisture content 5%) diatomite raw ore with a diatomite content of about 20% is crushed and dispersed by a LHI-70 horizontal impact mill and then fed into a LHB-N self-distributing airflow classifier for separation. Continuously feed and run for 40 minutes to obtain two graded products (1# coarse powder 1456kg (coarse sand), 2# fine powder 545kg); put 545kg graded fine powder and 800L of clean water into the ZCX-0.25×2 double-slot scrubbing machine for scrubbing And use sodium hydroxide to adjust the pH of the pulp to 9.5, and the scrubbing time is 20 minutes; the pulp after scrubbing enters the mixing tank, and 1380L of water and 850g of sodium pyrophosphate are added while stirring to disperse; the dispersed pulp is fed into a horizontal centrifugal concentrator for Separation of clay and diatomite, centrifugation factor 2400, centrifugation precipitate obtained 438kg of diatomite (moisture content about 8%) after pressure filtration and drying.

Embodiment 3

[0092] 2000kg (moisture content 5%) diatomite raw ore with a diatomite content of about 20% is crushed and dispersed by a LHI-70 horizontal impact mill and then fed into a LHB-N self-distributing airflow classifier for separation. Continuously feed and run for 40 minutes to obtain two graded products (1# coarse powder 1456kg (coarse sand), 2# fine powder 545kg); put 545kg graded fine powder and clean water 900L into the ZCX-0.25×2 double-slot scrubbing machine for scrubbing And use sodium hydroxide to adjust the pH of the pulp to 10, and the scrubbing time is 20 minutes; the pulp after scrubbing enters the mixing tank, and 1600L of water and 850g of sodium pyrophosphate are added while stirring to disperse; the dispersed pulp is fed into a horizontal centrifugal concentrator for Separation of clay and diatomite, centrifugation factor 2800, centrifuge precipitate obtained 445kg of diatomite (moisture content about 8%) after pressure filtration and drying.

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Abstract

The invention relates to the field of mineral processing, and discloses a dry-wet-method mineral separation method used for African sandy diatomite ore. The technical problem that in the prior art, a mineral separation scheme is difficultly suitable for mineral separation and purification of ultralow-grade sandy diatomite ore can be solved through the method. The method comprises the steps that raw diatomite ore is crushed and scattered to obtain diatomite ore powder, and the granularity of the diatomite ore powder is smaller than 10 mm; a self-flow-dividing type air classifier is used for carrying out dry-method classification on the diatomite ore powder to obtain two classified products, namely a classified course product and a classified fine product, and the classification fineness is 10-150 micrometers; water is added to the classified fine product for scrubbing pulping to obtain ore pulp; pH regulators and a dispersing agent, namely sodium pyrophosphate, are added and stirred to be scattered, so that pulp is obtained; the pulp is subjected to centrifugal separation to obtain first precipitate; and the first precipitate is dried to obtain purified diatomite. The technical effects of mineral separation and purification on the ultralow-grade sandy diatomite ore are achieved.

Description

technical field [0001] The invention relates to the field of mineral processing, in particular to a dry and wet beneficiation method for African sandy diatomite ore. Background technique [0002] Diatomaceous earth is a biogenic siliceous sedimentary rock whose main component is amorphous SiO 2 , because of its unique physical and chemical properties, has been widely used in the fields of chemical industry, environmental protection, building materials, agriculture and industrial filtration. It is a non-renewable non-metallic mineral resource closely related to modern industry and human environmental protection and health industries. So far, most of the diatomite resources that have been discovered or proven in the world are medium and low-quality clay or diatomite mines containing clay impurities. However, the diatomite mine in Niger, Africa is low-grade sandy diatomite, with a diatom content of about 20% in the original ore, which is a diatomite resource different from tha...

Claims

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Application Information

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IPC IPC(8): B03B7/00
Inventor 杨成伟支学军刘林林薛延丰杨登峰葛刚徐伟良刘明健马春光王峰于英亮巩向楠赵雄伟李东英
Owner BC P INC CHINA NAT PETROLEUM CORP
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