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Laminar centrifugal beneficiation method for diatomite ores

A technology of diatomite ore and ore dressing method, which is applied in the direction of centrifuges with rotating drums, centrifuges, chemical instruments and methods, etc., which can solve the problem of affecting the separation accuracy and recovery rate of diatomite and affecting the safety of separation It can solve the problems of safety, reliability, and high speed, and achieve the effect of high sorting efficiency and precision, small footprint, and good quality of fine soil.

Active Publication Date: 2013-02-13
CHINA UNIV OF MINING & TECH (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method better solves the problem of continuous separation of diatomite and clay impurities, and occupies a small area, has a high degree of mechanization, and can realize continuous production. The fine sand in the soil wears the screw seriously, which affects the safety and reliability of the sorting; at the same time, due to the high speed of the horizontal screw decanter centrifuge and the differential rotation of the screw in the cylinder, the sorting process is difficult in a highly turbulent flow. In the field, it affects the separation accuracy and recovery rate of diatomite

Method used

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  • Laminar centrifugal beneficiation method for diatomite ores

Examples

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Embodiment 1

[0045] Embodiment one: with 24kg (water content 55%) SiO 2 Diatomite ore with a content of 78.46% and a diatomite content of about 76% is added with 12L of water, added to a ZCX-0.08×2 double-slot scrubbing machine for scrubbing, and the pH of the pulp is adjusted to 9 with sodium hydroxide, and the scrubbing time is 15 minutes; the scrubbed pulp enters Add 44L of water and 380g of sodium pyrophosphate to the mixing tank to disperse while stirring; the dispersed pulp is sieved with a 200-mesh rotary vibrating sieve to separate impurities such as sand and debris, and then fed into Φ500 (imported) / Φ520 (Export) × 600 laminar flow centrifugal concentrator to separate clay and diatomite, centrifugal separation factor 548, feeding time 90s, diatomite (sediment) washing time 30s, intermittent 5s; filter and dry to obtain diatoms 9.11kg of fine soil (moisture content 6%).

Embodiment 2

[0046] Embodiment two: with 24kg (water content 55%) SiO 2 Diatomite ore with a content of 78.46% and a diatomite content of about 76% is added with 12L of water, added to a ZCX-0.08×2 double-slot scrubbing machine for scrubbing, and the pH of the pulp is adjusted to 9 with sodium hydroxide, and the scrubbing time is 15 minutes; the scrubbed pulp enters Add 44L of water and 380g of sodium pyrophosphate to the mixing tank to disperse while stirring; the dispersed pulp is sieved with a 200-mesh rotary vibrating sieve to separate impurities such as sand and debris, and then fed into Φ500 (imported) / Φ520 (Export) × 600 laminar flow centrifugal concentrator to separate clay and diatomite, centrifugal separation factor 402, feeding time 90s, diatomite (sediment) washing time 30s, intermittent 5s; filter and dry to obtain diatoms 9.01kg of fine soil (moisture content 6%).

Embodiment 3

[0047] Embodiment three: with 24kg (water content 55%) SiO 2 Diatomite ore with a content of 78.46% and a diatomite content of about 76% is added with 12L of water, added to a ZCX-0.08×2 double-slot scrubbing machine for scrubbing, and the pH of the pulp is adjusted to 9 with sodium hydroxide, and the scrubbing time is 15 minutes; the scrubbed pulp enters Add 44L of water and 380g of sodium pyrophosphate to the mixing tank to disperse while stirring; the dispersed pulp is sieved with a 200-mesh rotary vibrating sieve to separate impurities such as sand and debris, and then fed into Φ500 (imported) / Φ520 (Export) × 600 laminar flow centrifugal concentrator to separate clay and diatomite, centrifugal separation factor 308, feeding time 90s, diatomite (sediment) washing time 30s, intermittent 5s; filter and dry to obtain diatoms Refined soil 8.95kg (moisture content 6%).

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Abstract

The invention relates to a laminar centrifugal beneficiation method for diatomite ores, which comprises the following steps of scrubbing, slurrying, stirring, dispersing, screening, removing impurities, laminar centrifugal classifying, filtering and drying, wherein in the step of laminar centrifugal classifying, the slurry removed of sand grains and debris is fed in a laminar centrifugal separator for classifying, the technological conditions are as follows: the mass percent concentration of feeding ore slurry is 6-20%, the centrifugal separation factor is 75-900, the laminar centrifugal separator washes ore concentrate and discharges in 10-60s after 60-180s of the feeding time, and then pauses for 5-10s, then next work period starts by feeding the laminar centrifugal separator, and each work period lasts for 75-250s. According to the laminar centrifugal beneficiation method for diatomite ores, disclosed by the invention, middle-and-low grade diatomite ores can be efficiently separated, high recovery percent is achieved, and high-quality diatomite is obtained; the method has good adaptability to raw diatomite ores, the flow of the production line is short, the floor space is small, and the large-scale industrialization of beneficiation of diatomite ores is easy to achieve.

Description

Technical field: [0001] The invention relates to a laminar flow centrifugal mineral separation method for diatomite ore, which belongs to the field of mineral processing. Background technique: [0002] Diatomaceous earth is a natural nanopore distribution, large specific surface area, small bulk density, the main component is amorphous SiO 2 Natural siliceous porous minerals, widely used in filtration of beer, beverages, drinking water, medical and biochemical products, etc. Regulators, rubber and plastics, and paper-making functional fillers are valuable non-metallic mineral resources that are 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 are medium and low-quality clay or diatomite minerals containing clay impurities. Taking China as an example, although the proven reserves are hundreds of millions of tons, the high-quality diatomite resources that c...

Claims

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Application Information

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IPC IPC(8): B03B7/00B04B1/00B04B11/02B04B13/00
Inventor 郑水林孙志明张开永豆中磊张雁鸣李金辉
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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