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Method for enriching magnesium-containing minerals in asbestos tailings

A technology for asbestos tailings and minerals, applied in the field of mineral processing, can solve the problems of low grade and difficulty of magnesium-containing minerals, and achieve the effects of improving grade, easy operation and simple process steps.

Pending Publication Date: 2021-07-09
(CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the grade of magnesium-containing minerals is not high and the grade of magnesium-containing minerals is not high, and to provide an asbestos tailing Enrichment method of magnesium minerals in ore

Method used

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  • Method for enriching magnesium-containing minerals in asbestos tailings
  • Method for enriching magnesium-containing minerals in asbestos tailings
  • Method for enriching magnesium-containing minerals in asbestos tailings

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Embodiment 1

[0029] The main mineral phases of an asbestos tailings include serpentine (L), chrysotile (Ch), quartz (Q), magnetite (Ma), a small amount of albite (A), plagioclase (Mi), Calcite (C), etc., see its XRD pattern figure 2 , the specific composition is shown in the following table 1;

[0030] (1) Use a jaw crusher to crush asbestos tailings (the particle size composition is +8mm, 1.6%; 3~8mm, 90.3%; -3mm, 8.1%) to below 3mm, and use Φ200× for asbestos tailings below 3mm 240 type rod mill for grinding, the grinding medium is steel rod, weighing 13.2kg, the weight ratio of the grinding medium is Φ20mm: Φ16mm: Φ14mm=6.32kg: 4.36kg: 2.02kg; the ore feeding amount is 1.0kg / time; the grinding mass concentration 50%; the grinding time is 6 minutes; the particle size composition of asbestos tailings after grinding is +0.45mm content 1.5%, 0.105~0.45mm content 80.6%, -0.105mm content 17.9%;

[0031] (2) Use wet screening method to remove asbestos tailings after grinding to coarsely rem...

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Abstract

The invention relates to a method for enriching magnesium-containing minerals in asbestos tailings. The method is characterized by comprising the steps of (1) crushing or grinding the asbestos tailings, and controlling the dissociation granularity to be -0.71mm; (2) controlling the graded cutting granularity to range from 0.105mm to 0.038mm, grading the crushed or ground asbestos tailings to obtain fine-fraction asbestos tailings and coarse-fraction asbestos tailings, and conducting flotation on the coarse-fraction asbestos tailings, wherein an inhibitor is modified carboxyl starch, and a collecting agent and foaming agent is an amphoteric collecting agent or a cationic collecting agent; and (3) grinding the fine-fraction asbestos tailings obtained through grading and flotation concentrate together to obtain minerals with the granularity of -0.105mm, conducting magnetic separation, and controlling the magnetic field intensity to be smaller than or equal to 4000Gs to obtain magnetite and the magnesium-containing minerals. The method has the beneficial effects that the process is simple and suitable for industrial production; and through a combined process, the magnesium-containing minerals in associated asbestos tailings such as serpentine, quartz, feldspar and magnetite can be effectively extracted, aluminum reduction and quartz removal are realized, and the grade of the magnesium-containing minerals is increased.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and relates to a method for enriching magnesium-containing minerals in asbestos tailings. Background technique [0002] Asbestos tailings are the remaining mineral residues from asbestos mining. The main mineral components include serpentine, chrysotile, quartz, feldspar, magnetite, calcite, brucite, etc.; the main chemical components include MgO, SiO 2 、Al 2 o 3 , Fe 2 o 3 Wait. The asbestos content of asbestos mines in my country is usually not higher than 5%, so the existing reserves of asbestos tailings in my country are about hundreds of millions of tons. [0003] At present, there are mainly two comprehensive utilization schemes for asbestos tailings: [0004] One solution is the overall mixed utilization to produce concrete aggregates, glass-ceramics, refractory materials, thermal insulation materials, etc., such as the Chinese patent (CN104152686A), a method for decomposi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/06B03B1/00
CPCB03B9/06B03B1/00Y02W30/52
Inventor 张乾伟赵威吴建新俞燕强李佩悦
Owner (CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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