Washing and direct flotation method of low-grade refractory argillaceous phosphorite

A low-grade, positive flotation technology, used in flotation, phosphate material treatment, solid separation, etc., can solve the problems of difficult industrial application, high beneficiation cost, poor separation effect, etc. The effect of good selection index and low residual phosphorus in tailings

Active Publication Date: 2015-01-07
YUNNAN HONGFU CHEM FERTILIZER
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Problems solved by technology

[0008] (5) No co-associated elements with comprehensive recycling value were found in the ore
Although the separation index obtained by this invention is relatively good, it also has the disadvantages of complicated technological process and high beneficiation cost.
Application number is that the invention patent of 87101820 discloses a kind of novel and efficient phosphate rock flotation depressant calcium lignosulfonate sulfomethylated derivativ

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  • Washing and direct flotation method of low-grade refractory argillaceous phosphorite
  • Washing and direct flotation method of low-grade refractory argillaceous phosphorite

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[0048] See figure 1 , figure 2 , a low-grade refractory argillaceous phosphate ore washing positive flotation method, the present invention is characterized in that the process steps include: a. phosphate rock closed-circuit coarse crushing-fine crushing-screening-washing, fine ore closed-circuit wet grinding and classification process ; b. Phosphate ore roughing - double beneficiation - one sweep positive flotation - dense - press filter positive flotation process; where:

[0049] a. Phosphate rock closed-circuit coarse crushing-fine crushing-screening-water washing, fine ore closed-circuit wet grinding and classification process, the obtained mass percentage is P 2 o 5 Phosphorus concentrate ≥25%, particle size ≤25mm for yellow phosphorus production, prepared without flotation, used for phosphoric acid production, extraction and pulping particle size -100 mesh > 85%, mass percentage is P 2 o 5 28.5% phosphate slurry; figure 2 The shown technological process specifical...

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Abstract

The invention relates to a washing and direct flotation method of low-grade refractory argillaceous phosphorite, which is characterized by comprising the following steps: a. phosphorite closed coarse crushing, fine crushing, screening, water washing and fine ore closed wet grinding grading; and b. phosphorite rough separation, twice concentrating, once scavenging direct flotation, thickening and pressure filtration direct flotation. The step a is performed to prepare the phosphorus concentrate for yellow phosphorus production, of which the mass percent of P2O5 is greater than or equal to 25% and the particle size is less than or equal to 25mm, and prepare the phosphorite slurry for phosphoric acid production, extraction and slurry preparation without flotation, of which the content of particles with the particle size of 100 meshes is greater than 85% and the mass percent of P2O5 is 28.5%. By adopting the more-crushing/less grinding-closed screening-washing technique, the method can lower the grinding energy consumption by 10kw.h/t, and has the advantages of obvious separating effect between the phosphorite and gangue mineral and favorable separation indexes. Compared with the traditional technique, the phosphorus concentrate recovery rate is enhanced by 10% or so, and the tailing remaining phosphorus is lowered by 2-3%.

Description

technical field [0001] The invention relates to a method for ore washing positive flotation of low-grade refractory argillaceous phosphate rock, especially suitable for the mass percentage of P 2 o 5 Washing-flotation of <20% poor sedimentary silicon-calcareous phosphorite-like argillaceous phosphate rocks. Background technique [0002] At present, the main methods of processing phosphate rock are flotation, "scrubbing and desliming" process, gravity beneficiation, roasting-digestion process, chemical leaching technology, photoelectric sorting technology, combined beneficiation process, etc. Yunnan Hongfu Chemical Fertilizer Co., Ltd. owns the low-grade refractory argillaceous phosphate rock produced by the Dayangzi Phosphate Mine in Dongchuan District, and its mass percentage is P 2 o 5 <20%, is a typical sedimentary siliceous-calcareous phosphorite-like phosphate rock, because of its fine particle size, the dissociation of phosphorus minerals and gangue minerals i...

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Application Information

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IPC IPC(8): C01B25/01B03D1/02B03D103/02
Inventor 林顺芝洪其渊陈国华罗彪
Owner YUNNAN HONGFU CHEM FERTILIZER
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