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Ore dressing technique of microcrystal and cryptocrystal low grade collophanite ore

A cryptocrystalline, low-grade technology, applied in flotation, solid separation, etc., can solve the problems of difficult and effective utilization of middling mines, high energy consumption, and low recovery rate of phosphorous concentrate

Inactive Publication Date: 2009-01-28
CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this method is: the final product of phosphorous concentrate is a substandard product, and the content of harmful impurity MgO has greatly exceeded the standard stipulated by the state
The main problems in this process are high energy consumption, phosphorus concentrate is not up to standard, and the recovery rate of phosphorus concentrate is low, and it is difficult to effectively use medium ore

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) The ore mined from a certain mining area of ​​Shimen Phosphate Mine has a grade of P 2 o 5 15.47%, harmful impurity MgO content is 9.63%, after crushing-grinding, the ore is wet-ground to -200 mesh with a fineness of 92%; It is carried out in the center, using one desliming flotation, one reverse flotation and separation operation combined with carbonate reverse flotation foam products, discharging fine mud and carbonate tailings, and the dosage of desliming flotation agent water glass is 6.5Kg / t Raw ore; the dosage of WA-3 is 0.75Kg / t raw ore; flotation time is 4 minutes; the dosage of reverse flotation beneficiation mixed acid is 1Kg / t raw ore, and the flotation time is 8 minutes; (3) Phosphate positive flotation, desliming by flotation method The product in the final tank is subjected to phosphate positive flotation. The phosphate positive flotation is carried out in an alkali-free flotation medium at 25°C. The dosage of water glass is 1Kg / t raw ore, the dosage...

Embodiment 2

[0017] (1) The ore mined from a certain mining area of ​​Shimen Phosphate Mine has a grade of P 2 o 5 It is 15.47%, and the harmful impurity MgO content is 9.63%. After crushing-grinding, the ore is wet-ground to -200 mesh with a fineness of 92%; (2) Desliming by flotation, desliming by flotation at room temperature It is carried out in an alkali-free flotation medium, using a desliming flotation, and a reverse flotation selection operation combined with a carbonate reverse flotation foam product to discharge fine mud and carbonate tailings, and the dosage of desliming flotation agents The time and time are: the dosage of water glass is 6.5Kg / t raw ore; the dosage of WA-3 is 0.75Kg / t raw ore; the flotation time is 4 minutes; Phosphate positive flotation, the product in the tank after desliming by the flotation method is subjected to phosphate positive flotation, and the phosphate positive flotation is carried out in an alkali-free flotation medium at room temperature, and the...

Embodiment 3

[0019] (1) The ore mined from a certain mining area of ​​Shimen Phosphate Mine has a grade of P 2 o 519.02%, the content of harmful impurity MgO is 6.92%, after crushing-grinding, the ore is wet-ground to -200 mesh with a fineness of 90%; (2) Desliming by flotation, in the process of ore grinding This part of the fine mud is preferably floated out by flotation. The desliming of the flotation method is carried out in an alkali-free flotation medium at room temperature. Flotation and concentration operation, discharging fine mud and carbonate tailings, desliming flotation water glass dosage 8.0Kg / t raw ore, WA-3 dosage 1.0Kg / t raw ore; flotation time 4 minutes; reverse flotation concentration agent mixed acid The dosage is 0.5Kg / t raw ore, and the flotation time is 10 minutes. (3) Phosphate positive flotation, the product in the tank after desliming by flotation method is subjected to phosphate positive flotation, and phosphate positive flotation is flotation without alkali at ...

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Abstract

The invention relates to a beneficiation technology of crystallite and cryptocrystalline collophanite with low grade. The technology comprises the following steps: (1) ores are crushed and wetly ground to fineness that the content of minus 200 mesh is 90%-92%; (2) flotation method is carried out to remove mud; (3) phosphate salt direct flotation method is carried out; (4) carbonate salt reversed-flotation is carried out, and after reversed-flotation scavenging operation, the product in a flume is phosphate concentrate which is the ultimate product. The method of the invention is used for beneficiating collophanite with low grade, and overcomes the defect that no qualified phosphate concentrate can be obtained only by direct flotation previously; the content of deleterious impurity MgO in the phosphate concentrate is lowered to 1.78%, which achieves the requirement of phosphoric acid third grade phosphate concentrate prepared by wet process. The technology of the invention overcomes low recovery rate of concentrate in calcination-digestion- spiral beneficiation and high energy consumption, and the recovery rate of P2O5 is improved from 47.08% to 74.66%-80.90%.

Description

technical field [0001] The invention relates to a phosphate ore beneficiation process, in particular to a microcrystalline and cryptocrystalline low-grade collophosite ore beneficiation process. Background technique [0002] Phosphate ore in Shimen, Hunan is concentrated in Hupingshan Town, northwest of Shimen County. It has a large reserve of 1.4 billion tons of resource reserves. It is one of the eight major phosphate ore areas in my country, accounting for 78.34% of the phosphorus resource reserves in Hunan Province; but the grade is low. Only through enrichment can resources be effectively used. Shimen Phosphate Mine is divided into ten mining areas, of which there are 6 mining areas in Hunan. Among these 6 mining areas, the scale of the Dacheng Bay mining area is super large, and the Yangjiaping, Qingguandu, Guluoping, Fengxiangpo and Banqiao mining areas All are large in size. The mine is a neritic sedimentary layered phosphorite deposit, and the ore type is siliceous...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03B1/00
Inventor 汤建良黄银广谭功耀童德瑜郑贤福胡小全邹娟甘顺鹏
Owner CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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