CN1330984A - Process for increasing anti-floatation effeciency of phosphate - Google Patents
Process for increasing anti-floatation effeciency of phosphate Download PDFInfo
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- CN1330984A CN1330984A CN 00114674 CN00114674A CN1330984A CN 1330984 A CN1330984 A CN 1330984A CN 00114674 CN00114674 CN 00114674 CN 00114674 A CN00114674 A CN 00114674A CN 1330984 A CN1330984 A CN 1330984A
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- phosphate
- reverse flotation
- flotation
- floatation
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Abstract
A process for increasing the anti-floatation efficiency of the phosphate contained in raw ore or intermediate in the floatation procedure to remove carbonates features that the dosage of H2SO4 is increased by 10% and the inorganic salt having coagulation action to fine phosphate particles is additionally used. As a result, the P2O5 content is increased and the content of MgO as main impurity is decreased.
Description
The method relates to the field of phosphorite beneficiation. In order to enrich phosphate minerals and enable the quality of the produced phosphate concentrate to meet the requirement of fertilizer preparation by an acid method, people usually perform reverse flotation on phosphate in an acid medium and remove carbonate minerals mainly comprising dolomite symbiotic with the phosphate.
According to the category and content of gangue minerals symbiotic with phosphate minerals and the occurrence conditions of the gangue minerals and the phosphate minerals, the operation can be independently used and is called as 'single reverse flotation', and can also be used in combination with other operations to form 'reverse-direct flotation'; "forward-reverse flotation"; "double reverse flotation".
The method aims to improve the reverse flotation efficiency of removing carbonate such as dolomite from raw ore or intermediate product of phosphate-containing mineral.
Phosphate reverse flotation is generally added with a pH regulator of ore pulp, then an inhibitor of phosphate minerals and finally an anionic collector. Stirring and aerating. Carbonate minerals become foam products, and phosphate minerals are hydrophilic tank products (concentrate), so that foam flotation separation is realized. According to the difference of the added pulp pH regulator and phosphate inhibitor, three procedures can be generally divided: the first is called the whole phosphoric acid scheme. Phosphoric acid is here both an inhibitor of phosphate and a pulp pH adjuster. The process has good sorting index, but the medicament cost is high. In order to reduce the beneficiation cost, a mixed acid flow and a total sulfuric acid flow which partially replace phosphoric acid by sulfuric acid appear. The method does not need to add valence phosphoric acid in the whole sulfuric acid process, but utilizes the product of the reaction of sulfuric acid and phosphorite to realize the inhibition of phosphate:
in the reverse flotation operation, the consumption of sulfuric acid is 10-15 kg per ton of raw ore and less. Moreover, the reaction time is short, so the reaction is not complete, and the concentration of phosphate and dihydrogen phosphate ions which can inhibit phosphate is low. Therefore, the indexes of the beneficiation process are often inferior to those of the whole phosphoric acid flow.
According to the law of mass action, the theory that the rate of chemical reaction is proportional to the concentration of the reactant. The method can improve the concentration of phosphate radical and dihydrogen phosphate radical ions in the ore pulp by a method of improving the concentration of sulfuric acid, thereby improving the reverse flotation efficiency. In the same flotation machine, the flotation operation conditions are the same,the other reagents have the same dosage, the selected raw ore is certain silico-calcic collophanite with the same grade, the same amount of sulfuric acid is added, and only H is changed2SO4The reverse flotation test was performed at concentrations (typically 10%, 20%, 30%, 40%). As a result: concentrate P2O5The content increases with increasing sulfuric acid concentration (30.88%, 31.04%, 31.19%, 32.20%); the content of main impurities MgO in the concentrate is gradually reduced (0.91%, 0.74%, 0.63%, 0.43%); the magnesium discharge rate of the operation is gradually increased (87.2%, 89.6%, 91.2%, 93.07%). The effectiveness of this method was confirmed.
Second, in the reverse flotation process, an inorganic salt, such as AlCl, is added before the anionic collector is added3，Al2(SO4)3，FeSO4，Fe2(SO4)3When the aqueous solution is placed in the ore pulp, the double-electric-layer structure on the surface of the phosphate mineral can be compressed, the fine-grained phosphate is promoted to be condensed, the difference of the surface properties of the phosphate mineral and the carbonate mineral is increased, and therefore the reverse flotation efficiency is improved.
At the same stationIn the flotation machine, the flotation operation conditions are the same, the dosage of other reagents is the same, the selected raw ore is certain silico-calcic collophanite with the same grade, and the reverse flotation test is carried out by only changing the dosage of inorganic salt (0kg/T, 1.5kg/T, 2.5kg/T and 3.0 kg/T). As a result: p in the concentrate2O5The content is increased (29.01%, 29.19%, 29.44% and 29.65%), the content of main impurities MgO in the concentrate is obviously reduced (1.29%, 1.05%, 0.96% and 0.87%), the magnesium discharging rate in the reverse flotation operation is obviously improved (75.92%, 80.40%, 82.10% and 84.37%), and the test result proves that the addition of inorganic salt in the reverse flotation is beneficial to improving the reverse flotation efficiency.
Claims (1)
1. In the single reverse flotation or the reverse flotation operation in the positive-reverse flotation, the reverse-positive flotation and the double reverse flotation for removing the carbonate minerals from the phosphate mineral raw ores or intermediate products:
1>addition of sulfuric acid (H)2SO4) The content is more than 10 percent (no matter the adding amount).
2>Adding AlCl3、Al2(SO4)3Or polymers thereof, FeSO4、Fe2(SO4)3And inorganic salts (regardless of the amount added) that can agglomerate the fine particulate phosphate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00114674 CN1330984A (en) | 2000-07-04 | 2000-07-04 | Process for increasing anti-floatation effeciency of phosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00114674 CN1330984A (en) | 2000-07-04 | 2000-07-04 | Process for increasing anti-floatation effeciency of phosphate |
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| CN1330984A true CN1330984A (en) | 2002-01-16 |
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| CN 00114674 Pending CN1330984A (en) | 2000-07-04 | 2000-07-04 | Process for increasing anti-floatation effeciency of phosphate |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100522374C (en) * | 2006-01-27 | 2009-08-05 | 湖北宜化肥业有限公司 | Mineral dressing method of mid-low grade collophane |
| CN102389863A (en) * | 2011-09-30 | 2012-03-28 | 昆明川金诺化工股份有限公司 | Method for performing flotation on low-grade phosphate ores by taking H2SiF6 as auxiliary flotation regulator |
| CN102671753A (en) * | 2011-11-28 | 2012-09-19 | 云南磷化集团有限公司 | Dosing and size mixing method for ore dressing of high-carbonate and low-grade phosphorite |
| CN103949150A (en) * | 2014-03-14 | 2014-07-30 | 云南磷化集团有限公司 | Method using catalytic oxidation of sulfur dioxide tail gas for PH adjustment agent of phosphate rock ore dressing |
| CN108993779A (en) * | 2018-09-10 | 2018-12-14 | 湖北省黄麦岭磷化工有限责任公司 | Manganese phosphorus direct reverse flotation technique drops in low-grade manganese matter phosphorite mine demagging |
| CN111617885A (en) * | 2020-05-18 | 2020-09-04 | 宜都兴发化工有限公司 | Synchronous reverse flotation process for low-magnesium high-sesqui collophanite |
| CN113182077A (en) * | 2021-04-08 | 2021-07-30 | 宜都兴发化工有限公司 | Reverse flotation process for synchronously removing magnesium and aluminum in phosphorite |
-
2000
- 2000-07-04 CN CN 00114674 patent/CN1330984A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100522374C (en) * | 2006-01-27 | 2009-08-05 | 湖北宜化肥业有限公司 | Mineral dressing method of mid-low grade collophane |
| CN102389863A (en) * | 2011-09-30 | 2012-03-28 | 昆明川金诺化工股份有限公司 | Method for performing flotation on low-grade phosphate ores by taking H2SiF6 as auxiliary flotation regulator |
| CN102671753A (en) * | 2011-11-28 | 2012-09-19 | 云南磷化集团有限公司 | Dosing and size mixing method for ore dressing of high-carbonate and low-grade phosphorite |
| CN102671753B (en) * | 2011-11-28 | 2014-06-25 | 云南磷化集团有限公司 | Dosing and size mixing method for ore dressing of high-carbonate and low-grade phosphorite |
| CN103949150A (en) * | 2014-03-14 | 2014-07-30 | 云南磷化集团有限公司 | Method using catalytic oxidation of sulfur dioxide tail gas for PH adjustment agent of phosphate rock ore dressing |
| CN103949150B (en) * | 2014-03-14 | 2016-06-15 | 云南磷化集团有限公司 | SO 2 tail gas catalytic oxidation is for the method for flotation of phosphate rock pH adjuster |
| CN108993779A (en) * | 2018-09-10 | 2018-12-14 | 湖北省黄麦岭磷化工有限责任公司 | Manganese phosphorus direct reverse flotation technique drops in low-grade manganese matter phosphorite mine demagging |
| CN111617885A (en) * | 2020-05-18 | 2020-09-04 | 宜都兴发化工有限公司 | Synchronous reverse flotation process for low-magnesium high-sesqui collophanite |
| CN113182077A (en) * | 2021-04-08 | 2021-07-30 | 宜都兴发化工有限公司 | Reverse flotation process for synchronously removing magnesium and aluminum in phosphorite |
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