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Method for refining magnesium and reducing silicon from magnesite ores

A magnesite and ore technology, which is applied in the fields of reverse flotation extraction from magnesite ore to extract magnesium and reduce silicon, and magnesite ore to extract magnesium and reduce silicon, which can solve the complex composition of gangue minerals and increase the difficulty of sorting, etc. problem, to achieve the effect of low foam viscosity, strong practicability and convenient operation

Inactive Publication Date: 2017-06-13
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the quality of magnesite decreases, the associated gangue mineral components will become complex, and the association and interaction of useful minerals and gangue minerals will also increase the difficulty of sorting
The original heat treatment and gravity separation methods are difficult to effectively recycle low-grade magnesite ore

Method used

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  • Method for refining magnesium and reducing silicon from magnesite ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Quartz and magnesite are configured into a mixed ore sample according to a mass ratio of 3:97, the ore sample is weighed and put into a flotation cell, and deionized water is added to achieve a pulp concentration of 30%; Select the machine, under the condition of 1620r / min, stir and mix for 2min;

[0029] (2) After pulping, under normal temperature and under the natural pH condition of the pulp, add collector N,N-bis(hydroxyethyl)dodecylamine 50g / t, stir for 2min and then carry out flotation, the flotation time is 4min . After flotation, dry and weigh the foam product and the product in the tank respectively, take samples to test the grade, and calculate the recovery rate, wherein the product in the tank is concentrate, and the MgCO in the reverse flotation concentrate 3 Grade 98.94%, MgCO 3 The recovery rate can reach 86.51%, SiO 2 The removal rate can reach 93.69%, SiO in the concentrate 2 The grade is only 0.17%.

[0030] Or, after pulping, add 50 g / t of col...

Embodiment 2

[0032] (1) Quartz and magnesite are configured into a mixed ore sample according to a mass ratio of 1:9, and the ore sample is weighed and put into a flotation cell, and deionized water is added to achieve a pulp concentration of 30%; Select the machine, under the condition of 1620r / min, stir and mix for 2min;

[0033] (2) After pulping, under normal temperature and under the natural pH condition of the pulp, add collector N,N-bis(hydroxyethyl)dodecylamine 50g / t, stir for 2min and then carry out flotation, the flotation time is 4min . After flotation, dry and weigh the foam product and the product in the tank respectively, take samples to test the grade, and calculate the recovery rate, wherein the product in the tank is concentrate, and the MgCO in the reverse flotation concentrate 3 Grade 98.73%, MgCO 3 The recovery rate can reach 86.35%, SiO 2 The removal rate can reach 95.67%, SiO in the concentrate 2 The grade is 0.38%.

[0034] Or, after pulping, add 50 g / t of colle...

Embodiment 3

[0036](1) Quartz and magnesite are configured into a mixed ore sample according to a mass ratio of 1:9, and the ore sample is weighed and put into a flotation cell, and deionized water is added to achieve a pulp concentration of 30%; Select the machine, under the condition of 1620r / min, stir and mix for 2min;

[0037] (2) After pulping, add collector N,N-bis(hydroxyethyl)dodecylamine 60g / t under normal temperature and natural pH condition of pulp, stir for 2min and carry out flotation, the flotation time is 4min . After flotation, dry and weigh the foam product and the product in the tank respectively, take samples to test the grade, and calculate the recovery rate, wherein the product in the tank is concentrate, and the MgCO in the reverse flotation concentrate 3 Grade 98.72%, MgCO 3 The recovery rate can reach 83.46%, SiO 2 The removal rate can reach 96.26%, SiO in the concentrate 2 The grade is 0.36%.

[0038] Or, after slurry mixing, add collector N,N-di(hydroxypropyl...

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Abstract

The invention relates to a method for refining magnesium and reducing silicon from magnesite ores, in particular to a method for refining magnesium and reducing silicon from the magnesite ores by reverse flotation, and belongs to the technical field of mineral flotation separation in mineral processing engineering. The method for refining magnesium and reducing silicon from the magnesite ores includes the steps: mixing magnesite ore samples to be processed with water to obtain ore pulp with the concentration of 28-32%; adding 30-60g / t of collecting agents into the uniformly stirred ore pulp; uniformly stirring the added collecting agents and then performing flotation, wherein the collecting agents are N, N-di (hydroxyethyl) lauryl amine or N, N-di (hydroxypropyl) lauryl amine. The method for refining magnesium and reducing silicon from the magnesite ores is simple in technological process and reagent system, convenient to operate and good in industrial feasibility.

Description

technical field [0001] The invention relates to a method for extracting magnesium and reducing silicon from magnesite ore, in particular to a method for extracting magnesium and reducing silicon from magnesite ore by reverse flotation, and belongs to the technical field of mineral flotation separation in the field of mineral processing engineering. Background technique [0002] my country's magnesite resources are very rich, and the reserves rank among the top in the world. Among them, the magnesite resources in Liaoning account for more than 80% of the total magnesite resources in the country. It is the largest magnesite mining area in the world and the largest in my country. Magnesite production and processing base. Magnesite has high industrial value, because of its excellent properties such as good refractoriness, cohesiveness, and corrosion resistance, it is widely used in refractory materials, construction raw materials, chemical raw materials, and extraction of metal m...

Claims

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Application Information

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IPC IPC(8): B03D1/01B03D101/02B03D103/04
CPCB03D1/01B03D2201/02B03D2203/04
Inventor 刘文刚刘文宝魏德洲刘威王本英崔宝玉
Owner NORTHEASTERN UNIV
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