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Application of medicament in magnesite flotation and calcium removal

A technology for magnesite and magnesite powder, which is applied in flotation, solid separation and other directions, can solve the problems of increasing the difficulty of flotation separation and finely embedded particle size, and achieves shortening the flotation decalcification process, easy operation and simplification The effect of flotation decalcification process

Inactive Publication Date: 2019-06-07
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since dolomite and magnesite both belong to carbonate gangue minerals, have the same molecular structure and similar chemical properties, and some minerals are embedded with finer particle size, the magnesite and dolomite minerals are separated during the flotation process. Dissolution leads to the dissolution of a large amount of magnesium and calcium ions into the pulp. Due to the similar physical and chemical properties of calcium and magnesium ions, it is easy to cause surface transformation of magnesium carbonate, calcium magnesium carbonate and calcium carbonate under certain conditions, making the surface properties of magnesite and dolomite Convergence, increasing the difficulty of flotation separation

Method used

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  • Application of medicament in magnesite flotation and calcium removal
  • Application of medicament in magnesite flotation and calcium removal

Examples

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Effect test

Embodiment 1

[0036] The application of a medicament in the flotation decalcification of magnesite, the process flow diagram is shown in figure 1 , including the following steps:

[0037] Step 1: Grinding

[0038] The high-calcium and low-grade magnesite raw materials are crushed and ball milled to obtain magnesite powder; among them, the mass of magnesite powder with a particle size of less than 74 μm accounts for 70% of the total mass of magnesite powder ;

[0039] Step 2: Blending

[0040] Place the magnesite powder whose particle size is less than 74 μm and accounts for 70% of the total magnesite powder mass in the hanging tank type flotation machine, add deionized water and inhibitor BAPTA dimethyl sulfoxide solution, wherein, according to Solid-to-liquid ratio, inhibitor BAPTA: magnesite pulp = 30mg: 1L, and mix evenly, adjust the slurry to obtain magnesite slurry; wherein, the mass concentration of magnesite in the magnesite slurry is 20%; inhibitor The molar concentration of BAP...

Embodiment 2

[0046] A kind of application of medicament in magnesite flotation decalcification comprises the following steps:

[0047]Step 1: Grinding

[0048] The high-calcium and low-grade magnesite raw materials are crushed and ball milled to obtain magnesite powder; among them, in the magnesite powder, the mass of magnesite powder with a particle size of less than 74 μm accounts for 80% of the total mass of magnesite powder ;

[0049] Step 2: Blending

[0050] Place the magnesite powder whose particle size is less than 74 μm and accounts for 80% of the total magnesite powder mass in the hanging tank type flotation machine, add deionized water and inhibitor BAPTA dimethyl sulfoxide solution, wherein, according to Solid-to-liquid ratio, inhibitor BAPTA: magnesite pulp = 40mg: 1L, and mix evenly, adjust slurry to obtain magnesite slurry; wherein, the mass concentration of magnesite in the magnesite slurry is 25%; inhibitor The molar concentration of BAPTA dimethyl sulfoxide solution is...

Embodiment 3

[0056] A kind of application of medicament in magnesite flotation decalcification comprises the following steps:

[0057] Step 1: Grinding

[0058] The high-calcium and low-grade magnesite raw materials are crushed and ball milled to obtain magnesite powder; among them, in the magnesite powder, the mass of magnesite powder with a particle size of less than 74 μm accounts for 80% of the total mass of magnesite powder ;

[0059] Step 2: Blending

[0060] Place the magnesite powder whose particle size is less than 74 μm and accounts for 80% of the total magnesite powder mass in the hanging tank type flotation machine, add deionized water and inhibitor BAPTA dimethyl sulfoxide solution, wherein, according to Solid-to-liquid ratio, inhibitor BAPTA: magnesite slurry=50mg:1L, and mix evenly, adjust slurry to obtain magnesite slurry; wherein, the mass concentration of magnesite in the magnesite slurry is 30%; inhibitor The molar concentration of BAPTA dimethyl sulfoxide solution is...

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Abstract

The invention discloses an application of a medicament in magnesite flotation and calcium removal, and belongs to the technical field of magnesite processing and purifying. An inhibitor BAPTA is applied to a magnesite flotation and calcium removal technology. The application method comprises following steps: grinding high calcium low-grade magnesite, carrying out ball milling to obtain magnesite powder; adding magnesite powder into flotation equipment, adding deionized water and an inhibitor namely a BAPTA dimethyl sulfoxide solution, evenly mixing, blending, adding NaOH into the magnesite slurry at a room temperature to adjust the pH to 10-12, adding a collecting agent (sodium oleate), evenly mixing, and carrying out direct floatation and rougher flotation to obtain low calcium magnesiteconcentrate. Due to the floatation difference of added inhibitor BAPTA on magnesite and impurity ore (dolomite) in magnesite, the calcium ores in magnesite can be removed, the magnesite quality is improved, and a novel medicament is provided for the flotation and calcium removal of high calcium low-grade magnesite.

Description

technical field [0001] The invention relates to the technical field of magnesite beneficiation and purification technology, in particular to the application of a medicament in magnesite flotation decalcification. Background technique [0002] In the beneficiation and purification process of magnesite, reducing the CaO content is the key to improving the quality of magnesite. CaO in magnesite is mainly contained in impurity mineral dolomite (CaMg(CO 3 ) 2 )middle. However, since dolomite and magnesite both belong to carbonate gangue minerals, have the same molecular structure and similar chemical properties, and some minerals are embedded with finer particle size, the magnesite and dolomite minerals are separated during the flotation process. Dissolution leads to the dissolution of a large amount of magnesium and calcium ions into the pulp. Due to the similar physical and chemical properties of calcium and magnesium ions, it is easy to cause surface transformation of magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/01B03D1/002B03B1/00B03B1/04B03D101/02B03D103/04B03D101/06
CPCB03B1/00B03B1/04B03D1/002B03D1/01
Inventor 印万忠孙浩然唐远姚金杨斌韩会丽
Owner NORTHEASTERN UNIV
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