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Oredressing method for removing sesquioxide of iron and aluminum

A technology of sesquioxide and beneficiation method, used in flotation, solid separation and other directions, can solve the problems of large mud content, loss of phosphorus minerals, and high degree of weathering, and achieve reduction in content, purification process, and impurity content. low effect

Active Publication Date: 2012-10-03
YUNNAN PHOSPHATE CHEM GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the large and fine mud content of collophosite and the high degree of weathering, there is no suitable high-efficiency desliming equipment to classify the raw ore, and it is easy to cause a large amount of direct loss of phosphorus minerals

Method used

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  • Oredressing method for removing sesquioxide of iron and aluminum
  • Oredressing method for removing sesquioxide of iron and aluminum
  • Oredressing method for removing sesquioxide of iron and aluminum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Ore samples from Jinning Phosphate Mining Area, Yunnan, raw ore P 2 o 5 Content 19.74wt%, MgO content 1.31wt%, Fe 2 o 3 Content 1.68wt%, Al 2 o 3 The content is 2.69wt%. According to the above-mentioned process scheme of the present invention, phosphorus enrichment by forward and reverse flotation + reverse flotation to remove R under normal temperature conditions 2 o 3 The combined process flow to obtain phosphorous concentrate P 2 o 5 Content 30.40wt%, MgO content 0.26wt%, Fe 2 o 3 Content 0.90wt%, Al 2 o 3 Content 1.09wt%, where Fe 2 o 3 Exclusion rate: 72.51wt%, Al 2 o 3 Exclusion rate: 81.10wt%. Phosphate concentrate (Fe 2 o 3 +Al 2 o 3 +MgO)≤2.3wt%, CaO / P 2 o 5 =1.39, MgO / P 2 o 5 =0.86wt%, Fe 2 o 3 / P 2 o 5 =2.96wt%, Al 2 o 3 / P 2 o 5 =3.59wt%, MER=7.40wt% (Note: MER (impurity index) = (Fe 2 o 3 +Al 2 o 3 +MgO) / P 2 o 5 ).

Embodiment 2

[0035] Ore samples from Jinning Phosphate Mining Area, Yunnan, raw ore P 2 o 5 Content 20.03wt%, MgO content 1.13wt%, Fe 2 o 3 Content 1.73wt%, Al 2 o 3 The content is 3.21wt%. According to the above-mentioned technological scheme of the present invention, phosphorus-enriching + reverse flotation is used to remove R at room temperature. 2 o 3 The combined process flow to obtain phosphorous concentrate P 2 o 5 Content 30.96wt%, MgO content 0.60wt%, Fe 2 o 3 Content 0.81wt%, Al 2 o 3Content 0.79wt%, where Fe 2 o 3 Exclusion rate: 74.93wt%, Al 2 o 3 Exclusion rate: 82.06wt%. Phosphate concentrate (Fe 2 o 3 +Al 2 o 3 +MgO)≤2.2wt%, CaO / P 2 o 5 =1.39, MgO / P 2 o 5 =1.94wt%, Fe 2 o 3 / P 2 o 5 =2.62wt%, Al 2 o 3 / P 2 o 5 =2.55wt%, MER=7.11wt% (Note: MER (impurity index) = (Fe 2 o 3 +Al 2 o 3 +MgO) / P 2 o 5 ).

Embodiment 3

[0037] Mining sample of Kunyang Phosphate Mine in Yunnan Province, raw ore P 2 o 5 Content 23.47wt%, MgO content 4.98wt%, Fe 2 o 3 Content 1.31wt%, Al 2 o 3 The content is 1.19wt%. According to the above-mentioned technological scheme of the present invention, under normal temperature conditions, phosphorus enrichment through single reverse flotation + reverse flotation to remove R 2 o 3 The combined process flow to obtain phosphorous concentrate P 2 o 5 Content 30.66wt%, MgO content 0.55wt%, Fe 2 o 3 Content 0.81wt%, Al 2 o 3 Content 0.98wt%, where Fe 2 o 3 Exclusion rate: 51.62wt%, Al 2 o 3 Exclusion rate: 48.27wt%. Phosphate concentrate (Fe 2 o 3 +Al 2 o 3 +MgO)≤2.34wt%, CaO / P 2 o 5 =1.46, MgO / P 2 o 5 =1.79wt%, Fe 2 o 3 / P 2 o 5 =2.64wt%, Al 2 o 3 / P 2 o 5 =3.20wt%, MER=7.63wt% (Note: MER (impurity index) = (Fe 2 o 3 +Al 2 o 3 +MgO) / P 2 o 5 ).

[0038] In the 3 examples, the obtained phosphorus concentrate indicators all reached the fir...

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Abstract

The invention relates to an oredressing method for pertinently reducing content of sesquioxide of iron and aluminum (R2O3) in the collophanite floatation process in advance. The process comprises the following steps of: (1) levigating raw collophanite until grains with the grain size of 0.038mm are more than or equal to 76 weight percent, and controlling the pulp mixing concentration to be 25-40 weight percent; (2) introducing ore pulp into a mineralizing agitation tank of a floatation machine, adding an agent for floating conventional mid-low grade collophanite for pneumatic flotation, ensuring that a spindle speed of the floatation machine is 1,800-2,100r / min, the floating aeration quantity is 0.05-0.10m<3> / h and the floating scraper speed is 20-30r / min, and obtaining phosphate concentrate subjected to rough concentration; and (3) controlling the pH of the phosphate concentrate subjected to rough concentration to be 4.5-5.5, adding a collector for removing R2O3, performing pneumaticflotation for 4 to 8 minutes, removing an impurity of R2O3 from foam, and obtaining base flow, namely a high grade phosphate concentrate product. By the method, the R2O3 content in the concentrate can be obviously reduced, the quality of the phosphate concentrate is improved, and production processes, flows and cost during purification in the subsequent acid making process can be reduced.

Description

Technical field [0001] The invention relates to a method for reducing impurity iron and aluminum sesquioxides (R 2 o 3 ) content, to obtain high-grade phosphorus concentrate with low impurity content, to reduce the difficulty of phosphoric acid production and purification, and to simplify the phosphoric acid purification process and operating cost of the beneficiation method. Background technique [0002] With the rapid development of the phosphate fertilizer industry, the mining and consumption of phosphate rock have also increased sharply, the overall grade of phosphate rock has been declining, and the impurity components in phosphoric acid have become more and more complex. In particular, impurities such as iron, aluminum, and magnesium seriously affect the quality of phosphoric acid and the quality of further purification processing and high-end products. When raw material R 2 o 3 When the content exceeds 3wt%, it will reduce the production capacity of the fertilizer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03B1/00B03D1/018
Inventor 罗廉明杨稳权夏敬源刘鑫刘丽芬谢国先彭杰李若兰张树洪
Owner YUNNAN PHOSPHATE CHEM GROUP CORP
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