CN114515405A - Method for reducing total phosphorus in phosphorus tailings - Google Patents
Method for reducing total phosphorus in phosphorus tailings Download PDFInfo
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- CN114515405A CN114515405A CN202011294805.3A CN202011294805A CN114515405A CN 114515405 A CN114515405 A CN 114515405A CN 202011294805 A CN202011294805 A CN 202011294805A CN 114515405 A CN114515405 A CN 114515405A
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- phosphorus
- tailings
- reducing
- filter cake
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 96
- 239000011574 phosphorus Substances 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 55
- 239000002002 slurry Substances 0.000 claims abstract description 22
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000292 calcium oxide Substances 0.000 claims abstract description 18
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000008394 flocculating agent Substances 0.000 claims abstract description 18
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 17
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 17
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 17
- 238000005188 flotation Methods 0.000 claims abstract description 17
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 16
- 239000011737 fluorine Substances 0.000 claims abstract description 16
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 15
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002910 solid waste Substances 0.000 claims abstract description 14
- 239000003814 drug Substances 0.000 claims abstract description 7
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims abstract 3
- 239000012065 filter cake Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000002156 mixing Methods 0.000 claims description 15
- 208000005156 Dehydration Diseases 0.000 claims description 14
- 230000018044 dehydration Effects 0.000 claims description 14
- 238000006297 dehydration reaction Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 9
- 239000000706 filtrate Substances 0.000 claims description 7
- 229920002401 polyacrylamide Polymers 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 5
- 125000000129 anionic group Chemical group 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 description 19
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 19
- 239000010452 phosphate Substances 0.000 description 19
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 13
- 238000002474 experimental method Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 239000002920 hazardous waste Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- DJHGAFSJWGLOIV-UHFFFAOYSA-L Arsenate2- Chemical compound O[As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-L 0.000 description 2
- AQLMHYSWFMLWBS-UHFFFAOYSA-N arsenite(1-) Chemical compound O[As](O)[O-] AQLMHYSWFMLWBS-UHFFFAOYSA-N 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229940000489 arsenate Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- -1 fluoride ions Chemical class 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/45—Inorganic substances containing nitrogen or phosphorus
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/49—Inorganic substances containing halogen
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention relates to a method for reducing total phosphorus in phosphorus tailings, which reduces the content of soluble phosphorus, fluorine and arsenic in phosphorus tailings slurry after flotation by adding a flocculating agent and calcium oxide or calcium hydroxide into the phosphorus tailings slurry as medicaments. The method reduces the content of soluble phosphorus, fluorine and arsenic in the phosphorus tailings slurry after flotation, so that the phosphorus tailings can reach the I-type solid waste discharge standard, the tailing stockpiling cost is greatly reduced, and the stockpiled tailings and leachate thereof cannot pollute the surrounding environment. The medicament added in the treatment process is easy to find, and has low price, extremely low cost and simple and feasible process.
Description
Technical Field
The invention relates to a method for treating phosphorus tailings, in particular to a method for reducing total phosphorus in the phosphorus tailings.
Background
A large amount of soluble phosphorus and fluorine exist in phosphorus tailings after flotation, if phosphorus tailings are directly dewatered and stockpiled, phosphorus in leachate of the phosphorus tailings exceeds the integrated wastewater discharge standard, and belongs to general industrial solid waste II, and the stockpiling of the industrial solid waste II needs to adopt modes of paving an impermeable membrane and the like on a stockpiling site, so that the cost of paving the impermeable membrane in actual production is extremely high, and the impermeable membrane has the possibility of leakage.
Therefore, if the phosphorus tailings after flotation can be effectively treated to reach the general industrial solid waste I standard, the tailings after treatment reach the standard can be directly stockpiled or used for treating the open-air goaf of the phosphorite mountain without adopting methods such as paving an impermeable membrane and the like, and the method has important environmental protection and economic significance.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a method for reducing the total phosphorus in phosphorus tailings, which can effectively reduce the contents of phosphorus and fluorine in the flotation phosphorus tailings and greatly reduce the stacking cost of the subsequent phosphorus tailings.
The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to a method for reducing total phosphorus in phosphate tailings, which is characterized by comprising the following steps: the method reduces the content of soluble phosphorus, fluorine and arsenic in the phosphorus tailings slurry after flotation by adding a flocculating agent and calcium oxide or calcium hydroxide into the phosphorus tailings slurry as medicaments.
The principle of the method for reducing the total phosphorus in the phosphorus tailings is as follows:
1. phosphorus: soluble phosphorus reacts with calcium oxide or calcium hydroxide to generate insoluble hydroxyphosphate precipitate;
2. fluorine: fluoride ions and calcium oxide or calcium hydroxide generate insoluble fluoride precipitates;
3. soluble arsenic exists mainly in the form of inorganic arsenate and arsenite, and calcium oxide or calcium hydroxide reacts with the soluble arsenic to generate insoluble arsenate or arsenite precipitate.
The method for reducing the total phosphorus in the phosphate tailings further preferably adopts the technical scheme that: the method comprises the following specific steps:
(1) adding a flocculating agent accounting for 0.01-0.1% of the mass of the phosphorus tailing slurry into the phosphorus tailing slurry which is concentrated to 55-60% of the mass concentration, fully stirring and uniformly mixing, then dehydrating for the first time, and putting the obtained primary filter cake with the water content of 13-17% into a reaction tank;
(2) adding 800-1200 g of calcium oxide or calcium hydroxide into each ton of filter cake, adding calcium oxide or calcium hydroxide into the primary filter cake, adding a flocculating agent accounting for 0.01-0.1% of the weight of the primary filter cake, adding water, mixing to achieve a mass concentration of 47-55%, stirring, mixing, reacting for 20-30min, and performing secondary dehydration to obtain a secondary filter cake which is industrial solid waste.
The method for reducing the total phosphorus in the phosphate tailings further preferably adopts the technical scheme that: filtrate obtained by primary dehydration and secondary dehydration is recycled to a water return pool and returned to a flotation plant for recycling.
The method for reducing the total phosphorus in the phosphate tailings further adopts the preferable technical scheme that: the water content of the secondary filter cake is 13-17%.
The method for reducing the total phosphorus in the phosphate tailings further preferably adopts the technical scheme that: in the step (1), the mass of the flocculating agent added into the phosphorus tailing pulp is 0.05 percent of the mass of the phosphorus tailing pulp.
The method for reducing the total phosphorus in the phosphate tailings further preferably adopts the technical scheme that: in the step (2), the added calcium oxide or calcium hydroxide is 1000 g per ton of filter cake, and the added flocculating agent is 0.05 percent of the weight of the primary filter cake.
The method for reducing the total phosphorus in the phosphate tailings further preferably adopts the technical scheme that: both primary dewatering and secondary dewatering adopt a novel belt type vacuum filter.
The method for reducing the total phosphorus in the phosphate tailings further preferably adopts the technical scheme that: the flocculant is an anionic PAM flocculant. More preferably polyacrylamide.
Compared with the prior art, the invention has the following beneficial effects:
(1) the method of the invention reduces the content of soluble phosphorus, fluorine and arsenic in the phosphorus tailing slurry after flotation by adding a flocculating agent and calcium oxide or calcium hydroxide into the phosphorus tailing slurry as medicaments, so that the phosphorus tailing can reach the I-type solid waste discharge standard, and the medicament added in the treatment process is easy to find, has low price and extremely low cost.
(2) The invention has simple and feasible process, and can be realized by only one-time filtration, size mixing and water washing and secondary filtration. The treated tailing piles meeting the I-type solid waste discharge standard do not need to be paved with impermeable membranes at any positions, so that the tailing piling cost is greatly reduced, and the piled tailings and the leaching solution thereof can not pollute the surrounding environment.
(3) The medicament is directly added into the water washing process flow after primary filtration by adopting solid, thereby simplifying the process flow. The flocculating agent can greatly improve the dewatering capacity of the vacuum filter and reduce the water content of filter cakes after filtration.
(4) The novel belt type vacuum filter is adopted to dewater the tailings, the cost is greatly reduced compared with a high-efficiency filter press and a vertical filter press, and the cost of the novel belt type vacuum filter is only about 11 yuan per ton for certain phosphate ore tailings in Guizhou province. The novel belt type vacuum filter cleaning filter cloth is directly cleaned by filtered filtrate, and is safe, environment-friendly, simple and feasible. The filter cloth of the filter press needs to be soaked by nitric acid or special alkaline cleaning agent, and the cleaning agent is either acidic or alkaline and pollutes the environment.
Detailed Description
The following further describes embodiments of the present invention to facilitate further understanding of the present invention by those skilled in the art, and does not constitute a limitation to the right thereof.
Example 1 a process for reducing the total phosphorus in phosphate tailings by adding a flocculant and calcium oxide or calcium hydroxide as agents to the phosphate tailings slurry to reduce the soluble phosphorus, fluorine and arsenic content of the phosphate tailings slurry after flotation. The method comprises the following specific steps:
(1) adding a flocculating agent with the mass of 0.01 percent of the phosphorus tailing pulp into the phosphorus tailing pulp which is concentrated to 55 percent by mass, fully stirring and uniformly mixing, dewatering for the first time, and putting the obtained primary filter cake with the water content of 13 percent into a reaction tank;
(2) adding 800 g of calcium oxide or calcium hydroxide into each ton of filter cake, adding a flocculating agent accounting for 0.01 percent of the weight of the primary filter cake, adding water, mixing to reach the mass concentration of 47 percent, stirring, mixing, reacting for 20min, and performing secondary dehydration to obtain a secondary filter cake which is industrial solid waste.
And recovering the filtrate obtained by the primary dehydration and the secondary dehydration to a water return pool to return to the flotation plant for recycling. The water content of the secondary filter cake is 13%. Both primary dewatering and secondary dewatering adopt a novel belt type vacuum filter.
The 55% strength tailing slurry was not treated in this experiment and had a total phosphorus content of 1727mg/L, a fluorine content of 21.6mg/L and an arsenic content of 0.6357mg/L at a pH of 4.83. The total phosphorus content of the phosphate tailing filter cake treated by the method is 0.04mg/L, the fluorine content is 4mg/L, arsenic is not detected, and various indexes meet the general industrial solid waste standard of class I in the hazardous waste storage and disposal pollution control standard.
Example 2 a process for reducing the total phosphorus in phosphate tailings by adding a flocculant and calcium oxide or calcium hydroxide to the phosphate tailings slurry as agents to reduce the soluble phosphorus, fluorine and arsenic content of the phosphate tailings slurry after flotation. The method comprises the following specific steps:
(1) adding a flocculating agent accounting for 0.1 percent of the mass of the phosphorus tailing slurry into the phosphorus tailing slurry which is concentrated to 55 to 60 percent of the mass concentration, fully stirring and uniformly mixing, dewatering for the first time, and putting the obtained primary filter cake with the water content of 17 percent into a reaction tank;
(2) adding 1200 g of calcium oxide or calcium hydroxide into each ton of filter cake, adding a flocculating agent accounting for 0.1 percent of the weight of the primary filter cake, adding water, mixing to reach a mass concentration of 55 percent, stirring, mixing, reacting for 30min, and performing secondary dehydration to obtain a secondary filter cake which is industrial solid waste.
Filtrate obtained by primary dehydration and secondary dehydration is recycled to a water return pool and returned to a flotation plant for recycling. The water content of the secondary filter cake is 17%. Both primary dewatering and secondary dewatering adopt a novel belt type vacuum filter. The flocculant is an anionic PAM flocculant.
The tailing pulp with the concentration of 55-60% is not treated by the experiment, and when the pH value is 4.83-5.42, the total phosphorus content is 1727-1900mg/L, the fluorine content is 21.6-23.8mg/L, and the arsenic content is 0.6357-0.699 mg/L. The total phosphorus content of the phosphate tailing filter cake treated by the method is 0.04-0.24mg/L, the fluorine content is 4-4.3mg/L, arsenic is not detected, and various indexes meet the general industrial solid waste standards of class I in the hazardous waste storage and disposal pollution control standard.
Example 3, a method experiment for reducing total phosphorus in phosphate tailings:
first, experiment purpose
2 experiments prove that the phosphorus tailing slurry has the effect after being treated by the method.
II, an experimental process:
adding a flocculating agent polyacrylamide (agent B) with the mass concentration of 0.05 percent of the phosphorus tailing pulp into the phosphorus tailing pulp which is concentrated to 60 percent by mass concentration after flotation, fully stirring and uniformly mixing, dewatering for the first time, and putting the obtained primary filter cake with the water content of 15 percent into a reaction tank; adding calcium oxide (agent A) into the primary filter cake, adding flocculant polyacrylamide (agent B) accounting for 0.05 percent of the weight of the primary filter cake, adding water, mixing to reach a mass concentration of 50 percent, stirring, mixing, reacting for 25min, and dehydrating for the second time, wherein the obtained secondary filter cake is industrial solid waste. And (4) recovering the filtrate obtained by the primary dehydration and the secondary dehydration to a water return pool and returning the filtrate to the flotation plant for recycling. The water content of the secondary filter cake is 15%. Both primary dewatering and secondary dewatering adopt a novel belt type vacuum filter.
The tailing slurry with the concentration of 60 percent is not treated by the experiment, and when the pH value is 5.42, the total phosphorus content is 1727-1900mg/L, the fluorine content is 23.8mg/L, and the arsenic content is 0.699 mg/L. The total phosphorus content of the phosphate tailing filter cake treated by the method is 0.24mg/L, the fluorine content is 4.3mg/L, arsenic is not detected, and various indexes meet the general industrial solid waste standard of class I in the hazardous waste storage and disposal pollution control standard.
The following are relevant parameters for this embodiment:
the experiments show that the total phosphorus content of the phosphorus tailing pulp is greatly reduced after the phosphorus tailing pulp is treated by the method.
Claims (9)
1. A method for reducing total phosphorus in phosphorus tailings is characterized by comprising the following steps: the method reduces the content of soluble phosphorus, fluorine and arsenic in the phosphorus tailing slurry after flotation by adding a flocculating agent and calcium oxide or calcium hydroxide as medicaments into the phosphorus tailing slurry.
2. The method for reducing the total phosphorus in the phosphorus tailings of claim 1, wherein the method comprises the following steps: the method comprises the following specific steps:
adding a flocculating agent accounting for 0.01 to 0.1 percent of the mass of the phosphorus tailing slurry into the phosphorus tailing slurry which is concentrated to 55 to 60 percent of the mass concentration by flotation, fully stirring and uniformly mixing, then dehydrating for the first time, and putting an obtained primary filter cake with the water content of 13 to 17 percent into a reaction tank;
adding 800-1200 g of calcium oxide or calcium hydroxide into each ton of filter cake, adding calcium oxide or calcium hydroxide into the primary filter cake, adding a flocculating agent accounting for 0.01-0.1% of the weight of the primary filter cake, adding water, mixing and reacting for 20-30min, and performing secondary dehydration to obtain a secondary filter cake which is industrial solid waste.
3. The method for reducing the total phosphorus in the phosphorus tailings of claim 2, wherein the method comprises the following steps: and recovering the filtrate obtained by the primary dehydration and the secondary dehydration to a water return pool to return to the flotation plant for recycling.
4. The method for reducing the total phosphorus in the phosphorus tailings of claim 2, wherein the method comprises the following steps: the water content of the secondary filter cake is 13-17%.
5. The method for reducing the total phosphorus in the phosphorus tailings of claim 2, wherein the method comprises the following steps: in the step (1), the mass of the flocculating agent added into the phosphorus tailing pulp is 0.05 percent of the mass of the phosphorus tailing pulp.
6. The method for reducing the total phosphorus in the phosphorus tailings of claim 2, wherein the method comprises the following steps: in the step (2), the added calcium oxide or calcium hydroxide is 1000 g per ton of filter cake, and the added flocculating agent accounts for 0.05 percent of the weight of the primary filter cake.
7. The method for reducing the total phosphorus in the phosphorus tailings of claim 2, wherein the method comprises the following steps: both primary dewatering and secondary dewatering adopt novel belt vacuum filters.
8. The process for reducing total phosphorus in phosphorus tailings of any of claims 1 to 6, wherein the total phosphorus in the tailings is: the flocculant is an anionic PAM flocculant.
9. The method for reducing the total phosphorus in the phosphorus tailings of claim 8, wherein the method comprises the following steps: the flocculant is polyacrylamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011294805.3A CN114515405A (en) | 2020-11-18 | 2020-11-18 | Method for reducing total phosphorus in phosphorus tailings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011294805.3A CN114515405A (en) | 2020-11-18 | 2020-11-18 | Method for reducing total phosphorus in phosphorus tailings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114515405A true CN114515405A (en) | 2022-05-20 |
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Family Applications (1)
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| CN202011294805.3A Pending CN114515405A (en) | 2020-11-18 | 2020-11-18 | Method for reducing total phosphorus in phosphorus tailings |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157066A (en) * | 2007-11-13 | 2008-04-09 | 中蓝连海设计研究院 | A milling enriched technics for celestine ore |
| CN102228762A (en) * | 2011-05-16 | 2011-11-02 | 云南大红山管道有限公司 | Dehydration method and device of tailings |
| CN102805957A (en) * | 2012-06-04 | 2012-12-05 | 昆明理工大学 | Method for dewatering micro-particle tailing ore pulp |
| CN103657840A (en) * | 2013-07-10 | 2014-03-26 | 中蓝连海设计研究院 | Dry type discharge method of phosphorus ore tailings |
| CN106006893A (en) * | 2016-07-05 | 2016-10-12 | 中蓝连海设计研究院 | Treatment method for soluble phosphate radicals in phosphate rock tailings |
| CN106869995A (en) * | 2017-04-11 | 2017-06-20 | 中蓝连海设计研究院 | A kind of flotation tailing Total tailing consolidated fill method |
| CN110292807A (en) * | 2018-03-22 | 2019-10-01 | 南京梅山冶金发展有限公司 | Superfine Tailing thickening dewatering process |
| CN111013080A (en) * | 2019-12-30 | 2020-04-17 | 贵州昊华工程技术有限公司 | Method for harmless treatment of phosphate ore dressing tailing slag |
-
2020
- 2020-11-18 CN CN202011294805.3A patent/CN114515405A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157066A (en) * | 2007-11-13 | 2008-04-09 | 中蓝连海设计研究院 | A milling enriched technics for celestine ore |
| CN102228762A (en) * | 2011-05-16 | 2011-11-02 | 云南大红山管道有限公司 | Dehydration method and device of tailings |
| CN102805957A (en) * | 2012-06-04 | 2012-12-05 | 昆明理工大学 | Method for dewatering micro-particle tailing ore pulp |
| CN103657840A (en) * | 2013-07-10 | 2014-03-26 | 中蓝连海设计研究院 | Dry type discharge method of phosphorus ore tailings |
| CN106006893A (en) * | 2016-07-05 | 2016-10-12 | 中蓝连海设计研究院 | Treatment method for soluble phosphate radicals in phosphate rock tailings |
| CN106869995A (en) * | 2017-04-11 | 2017-06-20 | 中蓝连海设计研究院 | A kind of flotation tailing Total tailing consolidated fill method |
| CN110292807A (en) * | 2018-03-22 | 2019-10-01 | 南京梅山冶金发展有限公司 | Superfine Tailing thickening dewatering process |
| CN111013080A (en) * | 2019-12-30 | 2020-04-17 | 贵州昊华工程技术有限公司 | Method for harmless treatment of phosphate ore dressing tailing slag |
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