CN114289178A - Beneficiation method for recycling fine-grained phosphorus by using cyclone-flotation column - Google Patents
Beneficiation method for recycling fine-grained phosphorus by using cyclone-flotation column Download PDFInfo
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- CN114289178A CN114289178A CN202111680110.3A CN202111680110A CN114289178A CN 114289178 A CN114289178 A CN 114289178A CN 202111680110 A CN202111680110 A CN 202111680110A CN 114289178 A CN114289178 A CN 114289178A
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Abstract
The invention relates to the technical field of mineral separation, and discloses a mineral separation method for recovering fine-grained phosphorus by using a cyclone-flotation column, aiming at solving the problem that the recovery efficiency of the existing mineral separation method for recovering the fine-grained phosphorus is low, which comprises the following steps: feeding the ore pulp into a cyclone, concentrating and grading to obtain an overflow product and underflow ore pulp; feeding the underflow ore pulp to a roughing flotation column, and sorting to obtain roughing concentrate and roughing tailings; feeding the rougher tailings to a scavenging flotation column, sorting to obtain scavenging concentrate and scavenging tailings, discharging the scavenging tailings, and returning the scavenging concentrate to the rougher flotation column to form closed circulation; and (3) feeding the rough concentration obtained in the step (2) to a first fine flotation column, and performing first fine concentration and separation to obtain fine first concentrate and fine first tailings. The concentrate obtained by the beneficiation method has high content of P2O5, high recovery rate of flotation operation, improved recovery rate of fine-grained phosphorus, high market competitiveness and reduced beneficiation cost.
Description
Technical Field
The invention relates to the technical field of mineral separation, in particular to a mineral separation method for recovering fine-grained phosphorus by using a cyclone-flotation column.
Background
At present, the process flow of mineral separation of iron ore is that iron is first selected and then phosphorus is selected, an inclined plate thickening box is adopted to concentrate and remove primary and secondary slime before the phosphorus is selected from iron ore tailings, the concentration of ore pulp generated in a desliming process is 5%, the phosphorus loss is 21%, in order to improve the comprehensive utilization rate of phosphorus resources, fine-grained phosphorus in the ore pulp generated in the desliming process needs to be recovered, and the existing mineral separation method has the problem of low recovery efficiency for the recovery of the fine-grained phosphorus.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a beneficiation method for recovering fine-grained phosphorus by using a cyclone-flotation column.
In order to achieve the purpose, the invention adopts the following technical scheme:
a beneficiation method for recovering fine-grade phosphorus by using a cyclone-flotation column comprises the following steps:
step 1: feeding the ore pulp into a cyclone, concentrating and grading to obtain an overflow product and underflow ore pulp;
step 2: feeding the underflow ore pulp to a roughing flotation column, and sorting to obtain roughing concentrate and roughing tailings;
and step 3: feeding the rougher tailings to a scavenging flotation column, sorting to obtain scavenging concentrate and scavenging tailings, discharging the scavenging tailings, and returning the scavenging concentrate to the rougher flotation column to form closed circulation;
and 4, step 4: feeding the roughing concentrates obtained in the step 2 to a first fine flotation column, performing first fine flotation separation to obtain fine first concentrates and fine first tailings, and returning the fine first tailings to the roughing flotation column to form closed cycle;
and 5: and feeding the refined first concentrate to a second fine flotation column, performing second fine flotation to obtain refined second concentrate and refined second tailings, and returning the refined second tailings to the first fine flotation column to form closed circulation, wherein the refined second concentrate is a final product.
Preferably, the overflow product obtained in the step 1 has a 15um size fraction content of 90-98%; the concentration of the underflow ore pulp is more than or equal to 20 percent, and the content of 15um size fraction is 40-50 percent.
Preferably, the step 2 includes the following steps: feeding the underflow ore pulp into a stirring device, fully mixing the underflow ore pulp with a phosphorus selection medicament, and feeding the underflow ore pulp into a roughing flotation column.
Preferably, P in the rougher concentrate obtained in the step 22O5The content of (A) is 20%; p in roughed tailings2O5The content of (B) is 1%.
Preferably, P in the scavenged concentrate obtained in the step 32O5The content of (2) is 5 percent, and P in the scavenging tailings2O5The content of (B) is 0.7%.
Preferably, P in the fine first concentrate obtained in the step 42O5Is 25% and P in the fine tailings2O5The content of (B) is 3%.
Preferably, P in the refined second concentrate obtained in the step 52O5Is 33% and P in the second tailings2O5The content of (B) is 10%.
The invention has the beneficial effects that:
the content of P2O5 in the concentrate obtained by the flotation method reaches 33%, the content of P2O5 in the tailings reaches 0.7%, the theoretical yield of the flotation operation is 13.5%, and the theoretical recovery rate reaches 88%. The comprehensive yield of the whole sorting process is 6.62 percent, and the comprehensive recovery rate is 44.88 percent.
The concentrate obtained by the beneficiation method has high content of P2O5, high recovery rate of flotation operation, improved recovery rate of fine-grained phosphorus, high market competitiveness and reduced beneficiation cost.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example 1
Step 1: feeding the ore pulp into a cyclone, concentrating and classifying to obtain overflow products with the particle size fraction of 15um of 90 percent and underflow ore pulp with the particle size fraction of 15um of 40 percent, wherein the concentration of the underflow ore pulp is equal to 20 percent;
step 2: feeding underflow ore pulp to a stirring devicePlacing in a container, mixing with phosphorus-selecting agent, feeding to a rough flotation column, and selecting to obtain P2O5Roughing concentrate with 20% content and P2O51% of roughed tailings;
and step 3: feeding the rougher tailings to a scavenging flotation column, and sorting to obtain P2O5Scavenger concentrate with a content of 5% and P2O5Scavenging tailings with the content of 0.7 percent, discharging the scavenged tailings, and returning the scavenged concentrate to the roughing flotation column to form closed cycle;
and 4, step 4: feeding the rough concentration obtained in the step 2 to a first fine flotation column, and carrying out first fine flotation to obtain P2O5Refined-first concentrate with 25% content and P2O5Returning the fine first tailings with the content of 3% to the roughing flotation column to form closed cycle;
and 5: feeding the refined first concentrate to a second concentration flotation column for second concentration and separation to obtain P2O5Refined second concentrate with content of 33% and P2O5And returning the second refined tailings with the content of 10% to the first concentration flotation column to form closed circulation, wherein the second refined concentrate is a final product.
Example 2
Step 1: feeding the ore pulp into a cyclone, concentrating and classifying to obtain overflow products with the particle size fraction of 15um being 98 percent and underflow ore pulp with the particle size fraction of 15um being 50 percent, wherein the concentration of the underflow ore pulp is more than 20 percent;
step 2: feeding the underflow ore pulp into a stirring device, fully mixing the underflow ore pulp with a phosphorus selection medicament, feeding the underflow ore pulp into a roughing flotation column, and selecting to obtain P2O5Roughing concentrate with 20% content and P2O51% of roughed tailings;
and step 3: feeding the rougher tailings to a scavenging flotation column, and sorting to obtain P2O5Scavenger concentrate with a content of 5% and P2O5Scavenging tailings with the content of 0.7 percent, discharging the scavenged tailings, and returning the scavenged concentrate to the roughing flotation column to form closed cycle;
and 4, step 4: will be provided withFeeding the rough concentration obtained in the step 2 to a first fine flotation column, and carrying out first fine flotation to obtain P2O5Refined-first concentrate with 25% content and P2O5Returning the fine first tailings with the content of 3% to the roughing flotation column to form closed cycle;
and 5: feeding the refined first concentrate to a second concentration flotation column for second concentration and separation to obtain P2O5Refined second concentrate with content of 33% and P2O5And returning the second refined tailings with the content of 10% to the first concentration flotation column to form closed circulation, wherein the second refined concentrate is a final product.
Example 3
Step 1: feeding the ore pulp into a cyclone, concentrating and classifying to obtain overflow products with the grain size of 15um of 95 percent and underflow ore pulp with the grain size of 15um of 45 percent, wherein the concentration of the underflow ore pulp is more than 20 percent;
step 2: feeding the underflow ore pulp into a stirring device, fully mixing the underflow ore pulp with a phosphorus selection medicament, feeding the underflow ore pulp into a roughing flotation column, and selecting to obtain P2O5Roughing concentrate with 20% content and P2O51% of roughed tailings;
and step 3: feeding the rougher tailings to a scavenging flotation column, and sorting to obtain P2O5Scavenger concentrate with a content of 5% and P2O5Scavenging tailings with the content of 0.7 percent, discharging the scavenged tailings, and returning the scavenged concentrate to the roughing flotation column to form closed cycle;
and 4, step 4: feeding the rough concentration obtained in the step 2 to a first fine flotation column, and carrying out first fine flotation to obtain P2O5Refined-first concentrate with 25% content and P2O5Returning the fine first tailings with the content of 3% to the roughing flotation column to form closed cycle;
and 5: feeding the refined first concentrate to a second concentration flotation column for second concentration and separation to obtain P2O5Refined second concentrate with content of 33% and P2O5Returning the second fine tailings with the content of 10 percent to the first fine tailingsThe fine flotation column forms closed cycle, and the refined second concentrate is the final product.
From examples 1-3, it can be seen that the content of P2O5 in the concentrate obtained by the sorting method reaches 33%, the content of P2O5 in the tailings reaches 0.7%, the theoretical yield of the flotation operation reaches 13.5%, and the theoretical recovery rate reaches 88%. The comprehensive yield of the whole sorting process is 6.62 percent, and the comprehensive recovery rate is 44.88 percent.
The concentrate obtained by the beneficiation method has high content of P2O5, high recovery rate of flotation operation, improved recovery rate of fine-grained phosphorus, high market competitiveness and reduced beneficiation cost.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A beneficiation method for recovering fine-grade phosphorus by using a cyclone-flotation column is characterized by comprising the following steps:
step 1: feeding the ore pulp into a cyclone, concentrating and grading to obtain an overflow product and underflow ore pulp;
step 2: feeding the underflow ore pulp to a roughing flotation column, and sorting to obtain roughing concentrate and roughing tailings;
and step 3: feeding the rougher tailings to a scavenging flotation column, sorting to obtain scavenging concentrate and scavenging tailings, discharging the scavenging tailings, and returning the scavenging concentrate to the rougher flotation column to form closed circulation;
and 4, step 4: feeding the roughing concentrates obtained in the step 2 to a first fine flotation column, performing first fine flotation separation to obtain fine first concentrates and fine first tailings, and returning the fine first tailings to the roughing flotation column to form closed cycle;
and 5: and feeding the refined first concentrate to a second fine flotation column, performing second fine flotation to obtain refined second concentrate and refined second tailings, and returning the refined second tailings to the first fine flotation column to form closed circulation, wherein the refined second concentrate is a final product.
2. The beneficiation method for fine grade phosphorus recovery using a cyclone-flotation column according to claim 1, wherein the overflow product of step 1 has a 15um fraction content of 90-98%;
the concentration of the underflow ore pulp is more than or equal to 20 percent, and the content of 15um size fraction is 40-50 percent.
3. The beneficiation method for recovering fine-grained phosphorus by using the cyclone-flotation column according to claim 1, wherein the roughing in the step 2 comprises the following specific steps: feeding the underflow ore pulp into a stirring device, fully mixing the underflow ore pulp with a phosphorus selection medicament, and feeding the underflow ore pulp into a roughing flotation column.
4. A beneficiation process to recover fine-grained phosphorus using a cyclone-flotation column according to claim 1, wherein P in the rougher concentrate obtained in the step 2 is P2O5The content of (A) is 20%; p in roughed tailings2O5The content of (B) is 1%.
5. A beneficiation process to recover fine grade phosphorus using a cyclone-flotation column according to claim 1, wherein P in the scavenged concentrate obtained in step 3 is2O5The content of (2) is 5 percent, and P in the scavenging tailings2O5The content of (B) is 0.7%.
6. A beneficiation process for fine phosphorus recovery using a cyclone-flotation column according to claim 1, wherein P in the fine concentrate obtained in the step 4 is2O5Is 25% and P in the fine tailings2O5The content of (B) is 3%.
7. The beneficiation process for fine phosphorus recovery using a cyclone-flotation column according to claim 1, wherein P in the refined second concentrate obtained in the step 5 is P2O5In an amount ofIs 33 percent and P in the refined tailings2O5The content of (B) is 10%.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3099620A (en) * | 1960-08-31 | 1963-07-30 | Int Minerals & Chem Corp | Wet beneficiating of phosphate ores |
| RU2152258C1 (en) * | 1999-02-23 | 2000-07-10 | Открытое акционерное общество "Апатит" | Integrated apatite-nepheline ore concentration process |
| CN104826740A (en) * | 2015-05-07 | 2015-08-12 | 乌鲁木齐金石徽龙矿业有限公司 | Phosphorite flotation process |
| CN107413490A (en) * | 2017-06-05 | 2017-12-01 | 东北大学 | A kind of method of phosphorus, iron and titanium mineral in synthetical recovery magmatic phosphate deposit |
| CN109967222A (en) * | 2019-03-29 | 2019-07-05 | 中冶北方（大连）工程技术有限公司 | Apatite ilmenite selects titanium to drop general labourer's skill |
| CN113399121A (en) * | 2021-06-18 | 2021-09-17 | 承德宝通矿业有限公司 | Flotation process for recovering low-grade phosphorus from fine-fraction iron-dressing tailing slime containing copper and phosphorus |
-
2021
- 2021-12-26 CN CN202111680110.3A patent/CN114289178A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3099620A (en) * | 1960-08-31 | 1963-07-30 | Int Minerals & Chem Corp | Wet beneficiating of phosphate ores |
| RU2152258C1 (en) * | 1999-02-23 | 2000-07-10 | Открытое акционерное общество "Апатит" | Integrated apatite-nepheline ore concentration process |
| CN104826740A (en) * | 2015-05-07 | 2015-08-12 | 乌鲁木齐金石徽龙矿业有限公司 | Phosphorite flotation process |
| CN107413490A (en) * | 2017-06-05 | 2017-12-01 | 东北大学 | A kind of method of phosphorus, iron and titanium mineral in synthetical recovery magmatic phosphate deposit |
| CN109967222A (en) * | 2019-03-29 | 2019-07-05 | 中冶北方（大连）工程技术有限公司 | Apatite ilmenite selects titanium to drop general labourer's skill |
| CN113399121A (en) * | 2021-06-18 | 2021-09-17 | 承德宝通矿业有限公司 | Flotation process for recovering low-grade phosphorus from fine-fraction iron-dressing tailing slime containing copper and phosphorus |
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