Phosphate mineral inhibitor, its application in reverse floatation of phosphorus ore and preparation method

A technology of carbonate minerals and phosphate, applied in flotation, solid separation, etc., can solve the problems of abnormal production, scaling and pipeline blockage, high beneficiation cost, etc., to facilitate promotion, reduce beneficiation cost, and improve product quality Good results

Inactive Publication Date: 2003-09-24
WUHAN CHEM COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional reverse flotation process of phosphate rock has a full sulfuric acid flotation process. Because this process uses sulfuric acid as both a pH regulator and a phosphate mineral inhibitor, the amount of sulfuric...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Example 1. Laboratory test (forward to reverse flotation)

[0020] Raw ore P 2 o 5 The grade is 25.35%, the MgO grade is 2.73% phosphorite, after grinding, the foam product is obtained through positive flotation, and 2.5kg / t of sulfuric acid is added to the foam as a pH regulator, and 1.4kg / t of phosphoric acid derivatives are used as Depressant for phosphate minerals, without the addition of collectors in reverse flotation. Then, in the flotation machine, after stirring and aerated flotation, the carbonate minerals float out as foam products, and the phosphate minerals become the product (concentrate) in the tank to realize the separation of carbonate minerals and phosphate minerals. In this experiment, the concentrate P 2 o 5 31.05%, MgO 0.24%, concentrate yield 72.04%, recovery rate 88.23%, magnesium exclusion rate 93.67% of the beneficiation indicators.

example 2

[0021] Example 2. Laboratory test (single-reverse flotation) raw ore P 2 o 5 The grade is 27.33%, MgO grade is 6.19% phosphotic rock, after grinding, add 5.0kg / t of sulfuric acid as a pH regulator, and 1.0kg / t of phosphoric acid derivatives as an inhibitor of phosphate minerals, and then add collectors . Then, in the flotation machine, after stirring and aerated flotation, the carbonate minerals float out as foam products, and the phosphate minerals become the product (concentrate) in the tank to realize the separation of carbonate minerals and phosphate minerals. In this experiment, the concentrate P 2 o 5 37.34%, MgO 0.73%, concentrate yield 67.63%, recovery rate 92.39%, magnesium exclusion rate 92.02% of the beneficiation indicators.

example 3

[0022] Example 3. Expansion test (forward to reverse flotation)

[0023] Raw ore P 2 o 5 Phosphorite with a grade of 25.11% and MgO grade of 3.46%, after grinding, undergoes positive flotation to obtain a foam product, adding 3.66kg / t of sulfuric acid as a pH regulator to the foam, and 1.33kg / t of phosphoric acid derivatives As a depressant for phosphate minerals, no collector is added in reverse flotation. Then, in the flotation machine, after stirring and aerated flotation, the carbonate minerals float out as foam products, and the phosphate minerals become the product (concentrate) in the tank to realize the separation of carbonate minerals and phosphate minerals. In this experiment, the concentrate P 2 o 5 31.84%, MgO 0.48%, concentrate yield 69.83%, recovery rate 88.54%, magnesium exclusion rate 90.31% of the beneficiation indicators.

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Abstract

The present invention relates to a phosphate mineral depressing agent, its application in back-flotation of phosphorus ore and its preparation method, in which the phosphate mineral depressing agent is a derivative of phosphoric acid, pyrophosphoric acid or tetraphosphoric acid. The back-flotation operation for removing carbonate mineral from raw ore containing phosphate mineral or intermediate product uses the derivative of phosphoric acid as depressing agent of phosphate mineral. The preparation method of the phosphoric acid derivative includes the following steps: in wet phosphoric acid, adding phosphorus pentoxide, its added quantity is 200-400% of wet phosphoric acid quantity, heating and stirring so as to obtain the invented phosphoric acid derivative.

Description

technical field [0001] The invention relates to the field of phosphate rock flotation, in particular to a phosphate mineral inhibitor and its application and preparation method in phosphate rock reverse flotation. Background technique [0002] The traditional reverse flotation process of phosphate rock has a full sulfuric acid flotation process. Because this process uses sulfuric acid as both a pH regulator and a phosphate mineral inhibitor, the amount of sulfuric acid is high, which is likely to cause scaling and The blockage of the pipeline prevents the normal production; the other is the full phosphoric acid or mixed acid flotation process, the defect of which is the high cost of beneficiation. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an application of a phosphate mineral inhibitor in reverse flotation of phosphate rock. Minerals, reduce the content of carbonate in phosphorous concentrate, to solve the...

Claims

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Application Information

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IPC IPC(8): B03D1/014
Inventor 罗惠华钟康年王玉林汤亚飞
Owner WUHAN CHEM COLLEGE
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