CN1224461C - Multistage closed wet phosphate rock grinding process - Google Patents
Multistage closed wet phosphate rock grinding process Download PDFInfo
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- CN1224461C CN1224461C CN 02133870 CN02133870A CN1224461C CN 1224461 C CN1224461 C CN 1224461C CN 02133870 CN02133870 CN 02133870 CN 02133870 A CN02133870 A CN 02133870A CN 1224461 C CN1224461 C CN 1224461C
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- ore pulp
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Abstract
The present invention discloses a multistage closed wet phosphate ore grinding method. Rod milling operation and ball milling operation are combined in the method, the first section of rod milling and the second section of ball miller are used, and a multistage closed wet phosphate ore grinding technology of which inclined plates are graded and dense is used. The rod milling improves the ore milling selectivity; an inclined plate grading machine has high graded efficiency which can reach more than or equal to 60%, bottom flow takes less fine material, and over-milling phenomenon can not occur easily; graded overflow is carried out, the concentration requirement can be achieved by concentration of a thickener. The present invention has protruding technical effect and favorable economic benefit.
Description
Technical field
The present invention relates to the production method of phosphoric acid by wet process, more particularly, the present invention relates to the method for wet milling in a kind of Wet-process Phosphoric Acid Production.
Background technology
At present, in the Wet-process Phosphoric Acid Production, generally adopted simple wet method single hop open circuit ball-milling technology, as shown in Figure 1, this technological process makes in the product phosphorus ore slurry and has the thinless coarse grain of more mill, simultaneously there is more overground too thin shale again, had a strong impact on conversion ratio, filtration washing performance and the total phosphorus yield of downstream phosphoric acid extraction operation.Indivedual phosphorus ore wet milling technologies are also arranged, owing to be to combine with the phosphate rock floating process, and adopted the closed circuit ball-milling technology of single-stage, as shown in Figure 2, it is to carry out classification with cyclone, and classification efficiency is low, and the underflow folder is thin many, also easily cause overgroundly, and energy consumption is big, the operating cost height.This is bigger technical barrier that urgency is to be solved in the Wet-process Phosphoric Acid Production.
Summary of the invention
The objective of the invention is shortcoming, a kind of method of multistage closed wet phosphate rock grinding is provided at prior art.
The present invention is achieved by following technical proposals:
1. will send into rod mill through the phosphorus ore and the fresh water (FW) of primary breakup, carry out one section rod milling;
2. will send into the sloping plate grading machine through the logistics of rod milling with the ore pulp pump and carry out the classification of phosphorus ore slurry; It is dense that concentrator is sent in overflow, and underflow is sent into ball mill and carried out two sections ball millings;
3. the overflow of concentrator is returned rod mill by overflow launder and flood pump; The underflow of concentrator is pumped into ore pulp finished product storage tank with ore pulp;
4. the phosphorus ore slurry of two sections ball mills outlet is transported to the sloping plate grading machine with the ore pulp pump and carries out classification; Perhaps being delivered directly to finished product ore pulp storage tank with the ore pulp pump uses for the phosphoric acid extraction operation.
Description of drawings
Fig. 1 is the single hop open circuit ball-milling technology flow chart of prior art;
Fig. 2 is closed circuit ball milling of the single-stage of prior art and phosphate rock floating process process combined flow chart;
Fig. 3 is a multistage closed wet grinding process flow chart of the present invention.
The specific embodiment
Embodiment 1
The method of multistage closed wet phosphate rock grinding of the present invention is through the 180ktP of Yunnan Prov Sanhuan Chemical Co., Ltd
2O
5The large-scale wet-process phosphoric acid production plant test of/a.Test extremely successfully, obtain following outstanding technique effect and remarkable economic efficiency:
1. adopt rod milling, ball milling to combine one section rod milling, two sections ball millings, sloping plate grading, dense multistage closed ore grinding technology.Rod milling has improved the selectivity of ore grinding, and sloping plate grading machine classification matter efficient height can reach more than 60%, and the underflow folder is thin few, is difficult for causing overground; The classification overflow is through the dense concentration requirement that reaches of concentrator.
2. can reduce thinless coarse fraction and the overground too thin shale content of mill in the product phosphorus ore slurry, the shared ratio of the qualified particle of phosphorus ore slurry-0.147mm that produces reaches more than 90%, the shared ratio of+0.417mm corase particles can be reduced to below 2%, thereby has significantly improved the granularity and the distribution of phosphorus ore slurry.
3. ore pulp has reduced the ore pulp water content through the dense solid concentration that contains that reaches more than 67%.
4. the present invention makes the conversion ratio of downstream phosphoric acid extraction operation improve 2%～3%, and the washing rate improves 1%～2%, and the phosphorus pentoxide total recovery improves more than 2.5%.
5. operation continous-stable, the operation ratio height, energy consumption is low, and operating cost is low, the classification efficiency height, ore deposit consumption, acid consumption descend, and the production cost of phosphoric acid per ton descends more than 40 yuan.
Claims (1)
1. the method for a multistage closed wet phosphate rock grinding, this method comprises the following steps:
(1) primary breakup phosphorus ore and fresh water (FW) are sent into rod mill, carry out one section rod milling;
(2) will send into the sloping plate grading machine through the logistics of rod milling with the ore pulp pump and carry out the classification of phosphorus ore slurry; It is dense that concentrator is sent in overflow, and underflow is sent into ball mill and carried out two sections ball millings;
(3) overflow of concentrator is returned rod mill by overflow launder and flood pump; The underflow of concentrator is pumped into finished product ore pulp storage tank with ore pulp;
The phosphorus ore slurry of (4) two sections ball mill outlets is transported to the sloping plate grading machine with the ore pulp pump and carries out classification; Perhaps being delivered directly to finished product ore pulp storage tank with the ore pulp pump uses for the phosphoric acid extraction operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02133870 CN1224461C (en) | 2002-09-28 | 2002-09-28 | Multistage closed wet phosphate rock grinding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02133870 CN1224461C (en) | 2002-09-28 | 2002-09-28 | Multistage closed wet phosphate rock grinding process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1403201A CN1403201A (en) | 2003-03-19 |
| CN1224461C true CN1224461C (en) | 2005-10-26 |
Family
ID=4747435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02133870 Expired - Fee Related CN1224461C (en) | 2002-09-28 | 2002-09-28 | Multistage closed wet phosphate rock grinding process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1224461C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314492C (en) * | 2004-04-23 | 2007-05-09 | 贵阳铝镁设计研究院 | Two-stage grinding-classifying process for preparing alumina pulp |
| CN100448545C (en) * | 2005-09-23 | 2009-01-07 | 贵阳铝镁设计研究院 | High-iron gibbsite material grinding process |
| CN102921523B (en) * | 2012-12-03 | 2015-08-19 | 云南磷化集团有限公司 | A kind of method that can improve grinding efficiency and classification efficiency |
| CN104923368A (en) * | 2015-06-10 | 2015-09-23 | 中蓝连海设计研究院 | Ore grinding and beneficiation process for siliceous phosphorite |
| CN106311453A (en) * | 2016-08-30 | 2017-01-11 | 襄阳泽东化工集团有限公司 | Device for closed cycle phosphorite wet ball grinding and ball grinding method |
-
2002
- 2002-09-28 CN CN 02133870 patent/CN1224461C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1403201A (en) | 2003-03-19 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: YUNNAN PROV YUNTIANHUA INTERNATIONAL CHEMICAL CO., Free format text: FORMER NAME: YUNNAN PROV SANHUAN CHEMICAL CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: No. 1417, Dianchi Road, Xishan District, Yunnan, Kunming Province, China: 650028 Patentee after: Yunnan Yuntianhua International Chemical Co.,Ltd. Address before: Haikou Yunnan Kunming Sanhuan Chemical Co., Ltd., Xishan District, Yunnan Province, China: 650113 Patentee before: Yunnan Sanhuan chemical Limited by Share Ltd. Address after: Haikou Yunnan Kunming Sanhuan Chemical Co., Ltd., Xishan District, Yunnan Province, China: 650113 Patentee after: Yunnan Sanhuan chemical Limited by Share Ltd. Address before: Haikou Yunnan Kunming Sanhuan Chemical Co., Ltd., Xishan District, Yunnan Province, China: 650113 Patentee before: YUNNAN SANHUAN CHEMICAL Co.,Ltd. Address after: Haikou Yunnan Kunming Sanhuan Chemical Co., Ltd., Xishan District, Yunnan Province, China: 650113 Patentee after: Yunnan Sanhuan chemical stock Limited by Share Ltd. Address before: Haikou Yunnan Kunming Sanhuan Chemical Co., Ltd., Xishan District, Yunnan Province, China: 650113 Patentee before: YUNNAN SANHUAN CHEMICAL Co.,Ltd. |
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| C56 | Change in the name or address of the patentee |
Owner name: YUNNAN YTH INTERNATIONAL CHEMICAL CO., LTD. Free format text: FORMER NAME: YUNTIANHUA INTERNATIONAL CHEMICAL INDUSTRY CO., LTD., YUNNAN |
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| CP01 | Change in the name or title of a patent holder |
Address after: 650028 No. 1417, Dianchi Road, Xishan District, Yunnan, Kunming Patentee after: YUNNAN YUNTIANHUA INTERNATIONAL CHEMICAL CO.,LTD. Address before: 650028 No. 1417, Dianchi Road, Xishan District, Yunnan, Kunming Patentee before: Yunnan Yuntianhua International Chemical Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051026 Termination date: 20170928 |