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Method of graded use of reverse flotation phosphorus concentrate pulp

A phosphate concentrate slurry and reverse flotation technology, applied in flotation, solid separation, cyclone devices, etc., can solve the problems that the quality of phosphate slurry does not meet the requirements, cannot produce high-quality phosphate phosphate fertilizer products, and high impurity content. , to achieve the effect of enhancing competitiveness and economic benefits

Pending Publication Date: 2020-09-15
云南云天化红磷化工有限公司
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  • Claims
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AI Technical Summary

Problems solved by technology

With the rapid development of the phosphate fertilizer industry, the amount of phosphate rock has increased sharply, the overall grade of phosphate rock has been declining, the impurity content has continued to increase, and the MER value has risen, resulting in more and higher impurity components in phosphoric acid. High MER value Phosphoric acid, it is difficult to produce high-quality high-quality phosphate fertilizers and phosphorus chemical products
P 2 o 5 The grade has been improved, the MgO has been greatly reduced, and the MER value has dropped significantly. However, it is still only possible to produce ordinary phosphoric acid and phosphate fertilizer products, but cannot produce high-quality phosphoric acid, high-nitrogen and high-nutrient phosphate fertilizer products. The reason is that phosphoric acid produces The acid phosphate pulp has low grade, high impurity content, high MER value, and the quality of phosphate pulp cannot meet the requirements
In order to upgrade the product structure and produce high-quality phosphoric acid and high-quality phosphate fertilizer products, it is necessary to research and produce high-quality, low-MER value phosphate concentrate slurry for the production of high-quality phosphoric acid and high-quality phosphate fertilizer products. However, there is currently no effective phosphate concentrate Pulp graded utilization method, the prior art has certain limitations

Method used

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  • Method of graded use of reverse flotation phosphorus concentrate pulp
  • Method of graded use of reverse flotation phosphorus concentrate pulp
  • Method of graded use of reverse flotation phosphorus concentrate pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment production cycle is certain month 11-26 days, and the average quality of production input phosphate rock raw material ore is: P 2 0 5 content of 26.43%, MgO content of 2.21%, R 2 o 3 The content is 2.73%, MER value is 0.187; the average quality of column flotation rough concentrate is: P 2 0 5 content of 28.48%, MgO content of 0.76%, R 2 o 3 The content is 2.65%, and the MER value is 0.120; the average quality of the graded phosphorus concentrate after using this method to carry out cyclone classification again to the rough concentrate is: P 2 0 5 content of 28.99%, Mg0 content of 0.78%, R 2 o 3 The content is 2.41%, and the MER value is 0.110. The average quality of phosphoric acid used in wet-process phosphoric acid production is: P 2 0 5 content of 46.35%, Mg0 content of 1.65%, R 2 o 3 content of 2.80%, MER value 0.096; the average nitrogen content of diammonium phosphate (DAP) products produced is 17.52%, P 2 0 5 The content is 46.96%,...

Embodiment 2

[0043] This embodiment production cycle is certain month 3-12 days, and the average quality of production input phosphate rock raw material ore is: P 2 0 5 content of 26.88%, MgO content of 2.12%, R 2 o 3 The content is 2.48%, MER value is 0.171; the average quality of column flotation crude concentrate is: P 2 0 5 content of 28.93%, Mg0 content of 0.72%, R 2 o 3 The content is 2.31%, and the MER value is 0.105; the average quality of the graded phosphorus concentrate after using this method to classify the rough concentrate again is: P 2 0 5 content of 29.53%, Mg0 content of 0.75%, R 2 o 3 The content is 2.12%, and the MER value is 0.097. The average quality of phosphoric acid used in wet-process phosphoric acid production is: P 2 0 5 content of 47.33%, Mg0 content of 1.57%, R 2 o 3 The content is 2.58%, MER value is 0.088; The average nitrogen content of the produced diammonium phosphate (DAP) product is 18.02%, P 2 0 5 The content is 46.44%, and the total nut...

Embodiment 3

[0048] This embodiment production cycle is certain month 6-10 days, and the average quality of production input phosphate rock raw material ore is: P 2 0 5 content of 27.45%, MgO content of 2.08%, R 2 o 3 The content is 2.32%, MER value is 0.160; the average quality of column flotation rough concentrate is: P 2 0 5 content of 29.55%, Mg0 content of 0.66%, R 2 o 3 The content is 2.18%, and the MER value is 0.096; the average quality of the graded phosphorus concentrate after using this method to classify the coarse concentrate again is: P 2 0 5 content of 30.41%, Mg0 content of 0.70%, R 2 o 3 The content is 2.04%, the MER value is 0.090, and the phosphoric acid index produced by wet-process phosphoric acid is P 2 0 5 content of 50.03%, Mg0 content of 1.52%, R 2 o 3 content of 2.65%, MER value 0.083, the average nitrogen content of 66% monoammonium phosphate (MAP) produced is 11.06%, P 2 0 5 The content is 55.48%, the total nutrient is 66.54%, and the 66% nutrient ...

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Abstract

The invention provides a method of graded use of reverse flotation phosphorus concentrate pulp and relates to the technical field of phosphorus concentrate pulp classification. The method comprises the following steps of S1, crushing and ore-grinding raw ores with relatively high carbonate impurities, guaranteeing that ores of with grinding fineness of -20 meshes is greater than 80%, fully dissociating gangue minerals such as phosphorite and carbonate and controlling beneficiated pulp concentration at 25-28wt%; and S2, feeding the pulp into a first floatation stirring tank and a second floatation stirring tank for treatment, and adding an inhibitor and an adjustor sulfuric acid, sodium fluosilicate sewage and slag gallery return water into the first stirring tank, wherein the pH value of the pulp is controlled at 4.0-4.5. On a basis of rough concentrate obtained by reverse flotation rough concentration by a flotation column, graded phosphorus concentrate which is higher in quality andlower in MER value and overflow concentrate which is slightly inferior in quality and slightly high in MER value are obtained by cyclone classification, so that quality grading of the phosphorus concentrate is achieved, differential production of acid making is executed, and a purpose of superior use of superior ores, graded use and quality improvement and cost lowering is achieved.

Description

technical field [0001] The invention relates to the technical field of phosphorus concentrate pulp classification, in particular to a method for reverse flotation phosphorus concentrate pulp classification and utilization. Background technique [0002] Phosphate concentrate pulp is the main raw material for wet-process phosphoric acid production. The quality of phosphorus concentrate pulp and the level of solid content are very important for wet-process phosphoric acid production. an important factor. With the rapid development of the phosphate fertilizer industry, the amount of phosphate rock has increased sharply, the overall grade of phosphate rock has been declining, the impurity content has continued to increase, and the MER value has risen, resulting in more and higher impurity components in phosphoric acid. High MER value phosphoric acid, it is difficult to produce high-quality high-quality phosphate fertilizers and phosphorus chemical products. P 2 o 5 The grade ...

Claims

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Application Information

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IPC IPC(8): B04C9/00B03D1/02B03D103/06
CPCB04C9/00B03D1/02B03D1/021B03D2203/06
Inventor 吴兴买朱德秀柏中能周军李天华王文毓钟鸥罗启亮阮长希王思详
Owner 云南云天化红磷化工有限公司
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