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Method for processing phosphate rock tailing by adopting single direct flotation process

A technology for phosphate rock tailings and positive flotation, which is applied in flotation, solid separation and other directions to achieve the effects of good concentrate product quality, alleviation of pollution and easy operation.

Active Publication Date: 2015-08-26
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is aimed at the phosphorite tailings P in the prior art 2 o 5 To solve the problem of secondary recycling, provide a method with reasonable design, easy operation and good effect, using a single positive flotation process to treat phosphate rock tailings

Method used

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  • Method for processing phosphate rock tailing by adopting single direct flotation process

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Embodiment 1

[0016] Embodiment 1, with reference to figure 1 , a method for treating phosphate rock tailings using a single positive flotation process, the steps are as follows:

[0017] (1) Feed the phosphate ore tailings directly into the roughing flotation machine for a roughing, and add an appropriate amount of pH regulators, inhibitors, and anion collectors during the roughing, and choose NaCO as the pH regulator 3 , NaOH or lime, water glass and sodium lignosulfonate as the inhibitor, and fatty acid anion collector as the collector;

[0018] (2) The foam product of the roughing operation is classified according to the particle size of 325 mesh; the product of +325 mesh is sent to the grinding operation, and it is ground to the grinding fineness required by the flotation operation;

[0019] (3) The product ground by the grinding operation and the product of -325 mesh are combined together and given to the secondary roughing operation;

[0020] (4) The foam product of the second roug...

Embodiment 2

[0021] Embodiment 2, in the step (1) of a method for processing collophosite tailings by a single positive flotation process described in Embodiment 1, the main component of the phosphate rock tailings contains P by weight percentage 2 o 5 4.0~12.0%, MgO 2.0~18.0%, SiO 2 8.0~30.0%, and a small amount of other impurities.

Embodiment 3

[0022] Example 3, in the step (2) of a method for treating collophosite tailings by a single positive flotation process described in Example 1 or 2, the +325 mesh product is sent to the grinding operation, and it is ground to -325 mesh Accounted for 85~95%.

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Abstract

The invention discloses a method for processing phosphate rock tailing by adopting a single direct flotation process. The processing method comprises the following steps of directly feeding phosphate rock tailing into a roughing flotation machine, roughing by once, and properly adding a pH regulator, an inhibitor and an anionic collector during roughing; classifying a foam product during roughing according to the 325-mesh size fraction; feeding a +325-mesh product in grinding operation and grinding to the grinding fineness demanded by flotation; together combining a ground product and a -325-mesh product and then performing secondary roughing; carefully selecting the foam product during secondary roughing by 3-4 times, and scavenging the product in a slot by 1-2 times to prepare a concentrate product. The phosphate concentrate prepared by the processing method is relatively high in grade and recovery rate, and the processing method is simple in process and easy to realize industrial production. The pollution of phosphate rock tailing to environment can be greatly remitted by the method, and the processing method is very important to realize high-efficiency utilization and cyclic utilization of phosphate rock resources in our country.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a method for treating phosphorite tailings by a single positive flotation process. Background technique [0002] my country is very rich in phosphate rock resources, and the resource base reserves rank second in the world, but more than 94% of them are medium and low-grade phosphate rocks. This kind of ore must be extracted from carbonate gangue and silicate gangue at the same time to meet the requirements of downstream operations. Require. At present, there are mainly three flotation processes for low-grade calcium silica colloidal phosphate rock: direct reverse flotation process, direct-reverse flotation process, reverse-direct flotation process, and double reverse flotation process. At present, my country is undergoing After mineral processing and sorting, a large amount of tailings are produced every year, of which w(P 2 o 5 )=4%~10%, w(MgO)=2%~18%, this part of t...

Claims

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Application Information

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IPC IPC(8): B03D1/02B03D1/08B03D101/00B03D103/06
Inventor 李丰钱押林曹效权刘星强张红茹李青海刘云涛
Owner BLUESTAR LEHIGH ENG INST CO LTD
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