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Mineral dressing method of mid-low grade collophane

A beneficiation method and a technology for colloidal phosphate rock, applied in the field of beneficiation of medium and low-grade siliceous calcium phosphate rock, can solve the problems of difficult to qualify concentrate, low recovery rate, high beneficiation cost, and reduce grinding load and chemical dosage. , The effect of reducing beneficiation cost and beneficiation cost is low

Inactive Publication Date: 2009-08-05
湖北宜化肥业有限公司
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Problems solved by technology

At present, the collophosite mineral processing at home and abroad mainly adopts dense medium beneficiation, forward flotation, reverse flotation, forward and reverse flotation, and double reverse flotation. It is difficult to obtain high-grade qualified concentrates; positive flotation can only obtain satisfactory flotation indicators when the grinding particle size reaches -200 mesh, accounting for about 90%, and the recovery rate is too low; positive and negative flotation also requires fine grinding If the concentration is too fine, how to realize the utilization of return water in industrial production, how to avoid the interaction of anion and cation collectors and other issues; although double reverse flotation can obtain qualified concentrate, the recovery rate is too low and the cost of mineral processing is too high

Method used

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Embodiment Construction

[0006] Embodiment of the present invention: use raw ore P 2 o 5 23.63%, MgO 1.83% low-grade collophanite, the specific process is as follows:

[0007] (1) Dense medium beneficiation: use coarse, medium and fine three-stage one closed-circuit crushing system to crush the raw ore into -15mm, transport it to the raw ore storage warehouse through the belt, and enter the dense medium cyclone through the belt conveyor, and the dense medium cyclone Add the weighting agent magnetite into the device, the dosage is 4kg / t, and the separation density of the heavy medium is controlled to be 2.0g / cm 3 ~3.0g / cm 3 , the concentrate and tailings are obtained after being sorted by a dense medium cyclone, and the final concentrate product is obtained after the first stripping of the curved sieve and the second stripping of the stripping sieve, the concentrate P 2 o 5 The grade is 28.92%, and the recovery rate is 90.90%.

[0008] (2) Double-reverse flotation demagnesium and silicon reduction...

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Abstract

The invention discloses a method for beneficiating medium and low-grade collophosphine, which belongs to the technical field of beneficiation. It includes: dense medium beneficiation - double reverse flotation beneficiation process, medium and low-grade collophosphane first passes through heavy medium beneficiation to realize refining and tailings, and the obtained concentrate is then subjected to double reverse flotation to remove magnesium and reduce Silicon, producing qualified phosphorous concentrate products. Enrichment of collophosphine with a grade of only 20-26% P2O5 into high-grade concentrate with P2O531.5% or more, MgO ≤ 1%, and a recovery rate of over 80%. The concentrate can be used as a qualified raw material for the production of ammonium phosphate. It solves the problem that the middle and low-grade collophosphine is difficult to be utilized industrially.

Description

technical field [0001] The invention relates to a method for beneficiating phosphate ore, in particular to a method for beneficiating medium and low-grade silicon-calcium phosphate ore. Background technique [0002] my country is rich in phosphate rock resources, especially silicon-calcium phosphate rock, which is an important raw material for the production of phosphate fertilizer products. Silica-calcium phosphate rock, commonly known as "colloidal phosphate rock", belongs to sedimentary phosphate rock. The ore mineral is fluoroapatite, and the gangue minerals are mainly dolomite, clay minerals, quartz, potassium feldspar, etc. At present, the collophosite mineral processing at home and abroad mainly adopts dense medium beneficiation, forward flotation, reverse flotation, forward and reverse flotation, and double reverse flotation. It is difficult to obtain high-grade qualified concentrates; positive flotation can only obtain satisfactory flotation indicators when the gri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00
Inventor 蒋远华杨晓勤刘晓何涛黄启生瞿定军刘小平李书清张明
Owner 湖北宜化肥业有限公司
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