A kind of carrier flotation method of microfine rare earth ore

A rare earth ore and fine particle technology, used in flotation, solid separation and other directions, can solve problems such as research on -20μm fine rare earth minerals, and achieve the effect of realizing recovery, increasing the probability of collision and breaking through energy barriers, and simple operation.

Active Publication Date: 2018-05-22
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] To sum up, there is no targeted research on -20μm fine-grained rare earth minerals in the literature, and carrier flotation is one of the effective methods for the separation of fine-grained rare earth minerals when conventional processes are difficult to obtain ideal indicators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A rare earth mine in a certain place in China is selected. The main mineral composition is bastnaesite, orthoclase, quartz, barite, fluorite and calcite. Obtain -20μm fine-grained rare earth ore and remove -5μm slime to obtain -20μm+5μm fine-grained rare earth ore with a REO grade of 2.40%. Put the fine-grained rare earth ore in the mixing tank, add water to adjust the slurry to a concentration of 35%, add 1000 grams of water glass with a modulus of 2.4 per ton of raw ore, control the pH of the slurry to 8, and stir at a speed of 1500r / min Set aside after 15 minutes. Select bastnaesite with REO grade of 65% and particle size of -43μm+30μm as the carrier mineral, add water to the mixing tank to adjust the slurry to a concentration of 45%, and add 500 grams per ton of raw ore at a mass ratio of 1:5:10 Sodium linoleate: styrene phosphonic acid: alkylhydroxamic acid and 1000 grams of water glass with a modulus of 2.4, control the slurry pH8.5, rotating speed 1600r / min, aft...

Embodiment 2

[0027] A rare earth mine in a certain place in China is selected. The main mineral composition is monazite, neonite, feldspar, quartz, barite, fluorite and calcite. Obtain -20μm fine-grained rare earth ore and remove -5μm slime to obtain -20μm+5μm fine-grained rare earth ore with a REO grade of 1.59%. Put the fine-grained rare earth ore in the mixing tank, add water to adjust the slurry to a concentration of 30%, add 1000 grams of water glass with a modulus of 2.6 per ton of raw ore, control the pH of the slurry to 9, and stir at a speed of 2000r / min Standby after 18 minutes. Use monazite with a grade of 60% REO and a particle size of -43μm+30μm as the carrier, add water to the mixing tank to adjust the slurry to a concentration of 50%, and add 800 grams of linoleic acid with a mass ratio of 1:6 per ton of raw ore Sodium: alkyl hydroxamic acid and 1000 grams of water glass with a modulus of 2.6, control the slurry pH9, rotating speed 1800r / min, after stirring for 8min, mix th...

Embodiment 3

[0029]Select a rare earth mine in China, the main mineral composition is bastnaesite, monazite, neonite, hornblende, feldspar, barite, apatite and calcite, etc., and the mass fraction ratio of rare earth minerals is fluorocarbon Cerium ore: monazite is 7:3. Obtain -20μm fine-grained rare earth ore and remove -5μm slime to obtain -20μm+5μm fine-grained rare earth ore with a REO grade of 2.96%. Put the fine-grained rare earth ore in the mixing tank, add water to adjust the slurry to a concentration of 38%, add 1000 grams of water glass with a modulus of 2.8 per ton of raw ore, control the pH of the slurry to 10, and stir at a speed of 2000r / min Standby after 20min. Select REO grade 64%, bastnaesite with particle size of -43μm+30μm: monazite mass ratio of 7:3 carrier minerals, add water in the mixing tank to adjust the slurry to a concentration of 50%, add per ton of raw ore, Add 1500 grams of alkylhydroxamic acid and 1000 grams of water glass with a modulus of 2.8, control the...

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Abstract

The invention relates to a micro-fine particle rare earth ore carrier flotation method. The micro-fine particle rare earth ore carrier flotation method is characterized by including the following steps that (1) -5 micron slurry is desorbed from -20 micron micro-fine particle rare earth ore, the micro-fine particle rare earth ore with the size fraction being -20 micron+5 micron is obtained, water is added to conduct size mixing until the concentration ranges from 30% to 40%, an adjusting agent is added, the pH of ore pulp is controlled to range from 8 to 10, and stirring is carried out for 15 min to 20 min; (2) water is added into carrier ore to conduct size mixing until the concentration ranges from 40% to 50%, a collecting agent and an adjusting agent are added, the pH of the ore pulp is controlled to range from 8 to 10, and stirring is carried out for 5 min to 10 min; (3) the above carrier ore for size mixing and the micro-fine particle rare earth ore are mixed according to the mass ratio being 1:4, heating is carried out until the temperature ranges from 40 DEG C to 60 DEG C, an inhibitor and a collecting agent are added, and stirring is carried out for 40 min to 70 min; and (4) the ore pulp mixed in the step (3) is subject to flotation, and flotation concentrate and flotation tailings are obtained. The method has the beneficial effects of being simple in process flow, high in flotation speed, small in flotation agent using amount, environment-friendly, clean and high in adaptability, remarkably improving the recovery rate of the micro-fine particle rare earth ore and the like.

Description

technical field [0001] The invention relates to an ore beneficiation method, in particular to a method for flotation of fine-grained rare earth ore carriers. Background technique [0002] As an extremely important strategic resource, rare earths have long been known all over the world. They have the reputation of "industrial vitamins" and are widely used in various traditional and new material fields such as electrical and electronic, aerospace, petrochemical, environmental protection, and agriculture. According to research data, the global demand for rare earth oxides (REO) in 2011 was 105,000 tons; in 2016, the total global rare earth consumption is expected to reach 160,000 tons; in 2020, the global REO demand is predicted to reach 264,000 tons. It can be seen that rare earth will be a vigorous industry in the next few years or even decades, and its development momentum will surely move forward rapidly in line with Industry 4.0 and "Made in China 2025" in the context of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03D1/016B03D101/02B03D101/06
CPCB03D1/00B03D1/016B03D2201/02B03D2201/06
Inventor 王成行胡真邱显扬汪泰李汉文李沛伦汤玉和宋宝旭邹坚坚付华胡佛明武鲁庆王晨亮
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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