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Flotation calcium-removing agent and method for magnesite

A magnesite and medicament technology, applied in the field of magnesite processing, can solve problems such as difficult to meet the application requirements of magnesium materials, affect the purity and quality of magnesium products, and the operation process is not fine enough, so as to achieve considerable application prospects and facilitate promotion and operation easy effect

Inactive Publication Date: 2017-01-25
肃北镁弘科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Calcium, as the most difficult impurity in magnesite, will seriously affect the purity and quality of magnesium products, thereby affecting its application effect
At present, magnesite decalcification mainly includes flotation method, but the existing flotation technology adopts a single flotation agent and the operation process is not fine enough, so the decalcification effect is not obvious, and the obtained products are difficult to meet the application requirements of magnesium materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Raw ore pretreatment: Jaw crusher is used to crush magnesite raw ore, the crushed product is mixed with water and then fully ground by ball mill, and the ball mill product is sent to the classifier to pass through a 20-mesh standard sieve, and the material on the screen is collected and returned to The ball mill grinds again, and the material under the screen enters the reverse flotation process;

[0019] (2) Reverse flotation: According to the one-time reverse flotation chemical system: hydrochloric acid 1600 g / t, sodium phosphate 100 g / t, dodecylamine 20 g / t, accurately weigh the flotation reagents, and compare with the obtained The material under the sieve is fully mixed, and at the same time, an appropriate amount of water is added to stir evenly, then sent to the flotation machine, filled with sufficient air for flotation, and the bottom material is retained; according to the secondary reverse flotation reagent system: sodium phosphate 100 g / t, Dodecylamine 20 ...

Embodiment 2

[0023] (1) Raw ore pretreatment: Jaw crusher is used to crush magnesite raw ore, the crushed product is mixed with water and then fully ground by ball mill, and the ball mill product is sent to the classifier to pass through a 20-mesh standard sieve, and the material on the screen is collected and returned to The ball mill grinds again, and the material under the screen enters the reverse flotation process;

[0024] (2) Reverse flotation: According to the one-time reverse flotation agent system: hydrochloric acid 1680 g / t, sodium phosphate 140 g / t, dodecylamine 24 g / t, accurately weigh the flotation agents, and compare with the obtained The material under the sieve is fully mixed, and at the same time, an appropriate amount of water is added to stir evenly, then sent to the flotation machine, filled with sufficient air for flotation, and the bottom material is retained; according to the secondary reverse flotation reagent system: sodium phosphate 140 g / t, Dodecylamine 24 g / t, ...

Embodiment 3

[0028] (1) Raw ore pretreatment: Jaw crusher is used to crush magnesite raw ore, the crushed product is mixed with water and then fully ground by ball mill, and the ball mill product is sent to the classifier to pass through a 20-mesh standard sieve, and the material on the screen is collected and returned to The ball mill grinds again, and the material under the screen enters the reverse flotation process;

[0029] (2) Reverse flotation: According to the one-time reverse flotation agent system: hydrochloric acid 1700 g / t, sodium phosphate 150 g / t, dodecylamine 27 g / t, accurately weigh the flotation agents, and compare with the obtained The material under the sieve is fully mixed, and at the same time, an appropriate amount of water is added to stir evenly, then sent to the flotation machine, filled with sufficient air for flotation, and the bottom material is retained; according to the secondary reverse flotation reagent system: sodium phosphate 150 g / t, Dodecylamine 27 g / t, ...

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Abstract

The invention discloses a flotation calcium-removing agent and method for magnesite. Hydrochloric acid, sodium phosphate, dodecylamine, sodium hydroxide, sodium silicate, sodium hexametaphosphate, oleic acid and FZ-8 are taken as flotation calcium-removing agents, and different scientific and reasonable agent formula systems are adopted at different flotation stages, so that calcium content of the magnesite can be lowered effectively; meanwhile, a process flow of combining reverse flotation and positive flotation and adding flotation agents with a reasonable formula segmentally is adopted, so that the calcium content of the magnesite can be lowered effectively; as proved by detection, the MgO content of concentrated magnesite obtained by the flotation calcium-removing method is over 99 percent, the total impurity content is lower than 1.0 percent, and the CaO content is lower than 0.80 percent. By adopting the flotation calcium-removing agent and method, the calcium removal rate can be increased effectively, and the quality of the magnesite is improved; moreover, the method is easy and convenient to operate, is simple in process, has contribution to popularization, and has a considerable application prospect.

Description

technical field [0001] The invention relates to the technical field of magnesite processing, in particular to a calcium-removing agent and method for magnesite flotation. Background technique [0002] Magnesite is the main raw material for the production of metallic magnesium and other magnesium materials. Two-thirds of the world's magnesite reserves are concentrated in China, and more than half of the output is provided by China. In the world magnesite market, China has a pivotal position . As of 2012, there are 27 proven magnesite mines in my country, and the proven reserves are about 2.89×10 9 tons, accounting for 30.1% of the world's proven reserves, ranking first in the world. my country's magnesite is mainly distributed in Liaoning, Qinghai, Xinjiang, Gansu and other regions. [0003] In addition to the main component of magnesium carbonate, magnesite often contains impurities such as calcium, iron, silicon, aluminum, manganese, etc. When the content of impurities i...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D1/02B03D1/018B03D103/04
CPCB03D1/00B03D1/018B03D1/02B03D2203/04
Inventor 董波
Owner 肃北镁弘科技有限公司
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