CN112439552A - Phosphate rock acid triggering-cyclone demagging method - Google Patents
Phosphate rock acid triggering-cyclone demagging method Download PDFInfo
- Publication number
- CN112439552A CN112439552A CN202011257183.7A CN202011257183A CN112439552A CN 112439552 A CN112439552 A CN 112439552A CN 202011257183 A CN202011257183 A CN 202011257183A CN 112439552 A CN112439552 A CN 112439552A
- Authority
- CN
- China
- Prior art keywords
- phosphate
- cyclone
- ore
- acid
- demagging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
- B03D2203/06—Phosphate ores
Abstract
The invention provides a phosphate rock acid triggering-swirler demagging method, phosphate rock and water are prepared into ore pulp with the mass percentage concentration of 20-40% in a stirring tank, a sulfuric acid solution is added to the pH value of 2-5 in the process of mild stirring, then the mixture is rapidly pumped into a swirler for swirler separation, dolomite is discharged from an overflow port of the swirler to form tailings, and the phosphate rock is discharged from the bottom to form phosphate concentrate with low magnesium-phosphorus ratio. The sorting process flow is simple, and compared with the traditional direct-reverse flotation, the method has the characteristics of high sorting precision, good sorting index, high production capacity and the like.
Description
Technical Field
The invention relates to a phosphate rock acid triggering-cyclone demagging method, belonging to the technical field of mineral processing engineering.
Background
Dolomite is associated in a large amount of phosphate rocks in China, and the production requirements of phosphoric acid and high-concentration phosphate fertilizer can be met only after demagging by a mineral separation method.
Dolomite (Ca, MgCO)3) With apatite (Ca)5F(PO4)3) All contain ion Ca of the same name2+The floatability of the two is close, and when the fatty acid collecting agent is used, the separation is difficult. At present, the main method for reducing the content of magnesium oxide in phosphate concentrate at home and abroad is a flotation method, but because the selectivity of fatty acid is poor and the dispersibility is poor, heating treatment is often needed, so that the production cost is higher. Most importantly, high-quality phosphate concentrate with low magnesium content is difficult to obtain.
In order to solve the problem of separating apatite from dolomite and reduce the content of magnesium oxide in phosphate concentrate, the invention provides the beneficiation method with simple process flow and high separation efficiency.
Disclosure of Invention
The invention aims to provide a phosphate rock acid triggering-cyclone demagging method, which solves the problem of separation of apatite and dolomite, reduces the content of magnesium oxide in phosphate concentrate, and has the advantages of simple process flow and high separation efficiency.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a phosphate rock acid triggering-cyclone magnesium removal method specifically comprises the following steps: preparing the phosphate ore and water into ore pulp with the mass percentage concentration of 20-40% in a stirring tank, slightly stirring to keep the ore pulp in a suspension state, adding a sulfuric acid solution to the pH value of 2-5, and then quickly feeding the ore pulp into a cyclone through a pump to perform cyclone separation. The dolomite is discharged from the overflow port of the cyclone to become tailings, and the phosphate ore is discharged from the bottom to become phosphate concentrate with low magnesium-phosphorus ratio.
Further, the phosphate ore composition is: p2O5The grade is 20-34%, the MgO content is 1-10%, and the ore granularity is less than 0.5 mm;
further, the adding amount of the sulfuric acid depends on the pH value of the ore pulp between 2 and 5;
further, the sulfuric acid can be replaced by hydrochloric acid, nitric acid and acetic acid;
furthermore, the cyclone is an acid-resistant cyclone, and the separation process can be completed by single roughing or by the combination of roughing, fine separation and scavenging;
the carbon dioxide bubbles formed by the dolomite in the ore pulp meeting acid are adsorbed at the periphery of the dolomite, so that the apparent specific gravity of the dolomite is rapidly reduced, the surface of the apatite has no bubbles, the density of the apatite is unchanged, and the existence of density difference is beneficial to the separation of the phosphorite and the dolomite.
The technical principle of the invention is as follows:
the dolomite has the function of reacting with acid to form CO2The characteristic of the bubbles is that in the reaction process, the bubbles are continuously generated and desorbed on the surface of the dolomite, and the undegassed bubbles and mineral particles form a gas-solid combination body, so that the apparent specific gravity of the particles is reduced, and the apparent specific gravity of the apatite is almost unchanged. The difference in variation provides sufficient conditions for density sorting of dolomite and apatite in the cyclone. In view of the above, the present invention provides a new beneficiation process: the cyclone is adopted to remove dolomite in the apatite, thereby achieving the purpose of reducing the content of magnesia.
The invention has the advantages that:
the sorting process flow is simple, and compared with the traditional direct-reverse flotation, the sorting process flow has the characteristics of high sorting precision, good sorting index, high production capacity and the like. The collector has poor selectivity on dolomite in the conventional flotation process for magnesium removal, the content of magnesium oxide in phosphate concentrate is difficult to be less than 1%, the bubble generation process on the surface of dolomite has ultrahigh selectivity, the separation precision is greatly improved, and the aim of the content of magnesium oxide in phosphate concentrate being less than 1% is easily realized.
Detailed Description
The technical solutions of the present invention are further described below with reference to the following examples, but the scope of the present invention is not limited to the scope described in the examples.
Example 1
For some phosphate ore, raw ore P in Haikou of Yunnan province2O5The grade is 20.47%, the MgO content is 4.5%, and the ore granularity is less than 0.5 mm. Preparing the phosphate ore and water into ore pulp with the mass percentage concentration of 20% in a stirring tank, slightly stirring to keep the ore pulp in a suspension state, adding a sulfuric acid solution to a pH value of 3, then quickly feeding the ore pulp into a cyclone through a pump, and carrying out cyclone separation. Through once roughing and once fine selection, P is obtained2O5Phosphate concentrate with the content of 26.3 percent and the content of MgO of 0.96 percent. P2O5The recovery rate reaches 96 percent, and the removal rate of MgO reaches 89 percent.
Example 2
For some phosphate ore, raw ore P of Kaiyang Haikou of Guizhou2O5The grade is 30.5 percent, the MgO content is 1.5 percent, and the ore granularity is less than 0.4 mm. Preparing the phosphate ore and water into ore pulp with the mass percentage concentration of 250% in a stirring tank, slightly stirring to keep the ore pulp in a suspension state, adding a sulfuric acid solution to the pH value of 2, then quickly feeding the ore pulp into a cyclone through a pump, and carrying out cyclone separation. Through one-time concentration, P is obtained2O5Phosphate concentrate with 31.4% of MgO content and 0.76% of MgO content. P2O5The recovery rate of the catalyst reaches 95 percent, and the removal rate of MgO reaches 81 percent.
Example 3
For certain phosphorus ore in Hubei, raw ore P2O5The grade is 33.9 percent, the MgO content is 2.1 percent, and the ore granularity is less than 0.3 mm. Preparing the phosphate ore and water into ore pulp with the mass percentage concentration of 35% in a stirring tank, slightly stirring to keep the ore pulp in a suspension state, adding a sulfuric acid solution to the pH value of 4, then quickly feeding the ore pulp into a cyclone through a pump, and carrying out cyclone separation. Through once roughing and once fine selection, P is obtained2O5Phosphate concentrate with 34.0% of MgO content and 0.85% of MgO content. P2O5The recovery rate reaches 91 percent, and the removal rate of MgO reaches 83 percent.
Example 4
For some phosphate ore, raw ore P in Yunnan province2O5Grade of 263%, MgO content 5.2%, ore granularity less than 0.15 mm. Preparing the phosphate ore and water into ore pulp with the mass percentage concentration of 25% in a stirring tank, slightly stirring to keep the ore pulp in a suspension state, adding a sulfuric acid solution to the pH value of 2, then quickly feeding the ore pulp into a cyclone through a pump, and carrying out cyclone separation. Obtaining P through once roughing and once fine selection2O5Phosphate concentrate with the content of 26.9 percent and the content of MgO of 0.91 percent. P2O5The recovery rate reaches 95 percent, and the removal rate of MgO reaches 88 percent.
Example 5
For some phosphate ore, raw ore P in Sichuan2O5The grade is 29.7%, the MgO content is 3.5%, and the ore granularity is less than 0.2 mm. Preparing the phosphate ore and water into ore pulp with the mass percentage concentration of 30% in a stirring tank, slightly stirring to keep the ore pulp in a suspension state, adding a sulfuric acid solution to the pH value of 3.5, then quickly feeding the ore pulp into a cyclone through a pump, and carrying out cyclone separation. Obtaining P through once roughing and once fine selection2O5Phosphate concentrate with 31.3% of MgO content and 0.74% of MgO content. P2O5The recovery rate reaches 94 percent, and the removal rate of MgO reaches 85 percent.
Comparative example 1
For some phosphate ore, raw ore P in Yunnan province2O5The grade is 26.3 percent, the MgO content is 5.2 percent, and the ore granularity is less than 0.15 mm. The method comprises the steps of using a mixed solution of sulfuric acid and phosphoric acid (prepared according to a mass ratio of 2: 1) as an inhibitor, using 3000g/t of raw ore for roughing operation, using 1000g/t of raw ore for concentrating operation, using dodecylamine as a silicate mineral collecting agent, using 500g/t of raw ore for roughing operation and using 200g/t of raw ore for concentrating operation, and obtaining P through a reverse flotation process flow of first roughing and second refining2O5The content of the phosphate concentrate is 31.5 percent, and the recovery rate is 87 percent. But the MgO content is 1.9 percent and is more than 1 percent, and the quality of the phosphate concentrate does not reach the standard.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (4)
1. A phosphate rock acid triggering-cyclone demagging method is characterized by comprising the following steps: preparing the phosphate ore and water into ore pulp with the mass percentage concentration of 20-40% in a stirring tank, slightly stirring to keep the ore pulp in a suspension state, adding a sulfuric acid solution to the pH value of 2-5, then quickly feeding the ore pulp into a swirler through a pump to perform swirler separation, discharging dolomite from an overflow port of the swirler to form tailings, and discharging the phosphate ore from the bottom to form phosphate concentrate with low magnesium-phosphorus ratio.
2. The phosphate triggered-cyclone demagging process of claim 1 wherein: the composition of the phosphate ore is as follows: p2O5The grade is 20-34%, the MgO content is 1-10%, and the ore granularity is less than 0.5 mm.
3. The phosphate rock acid triggered-cyclone demagging method of claim 1, wherein: the sulfuric acid can be replaced by hydrochloric acid, nitric acid and acetic acid.
4. The phosphate rock acid triggered-cyclone demagging method of claim 1, wherein: the cyclone is an acid-resistant cyclone, and the separation process can be completed by single roughing or by the combination of roughing, fine selection and scavenging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011257183.7A CN112439552A (en) | 2020-11-12 | 2020-11-12 | Phosphate rock acid triggering-cyclone demagging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011257183.7A CN112439552A (en) | 2020-11-12 | 2020-11-12 | Phosphate rock acid triggering-cyclone demagging method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112439552A true CN112439552A (en) | 2021-03-05 |
Family
ID=74736836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011257183.7A Pending CN112439552A (en) | 2020-11-12 | 2020-11-12 | Phosphate rock acid triggering-cyclone demagging method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112439552A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113492063A (en) * | 2021-06-02 | 2021-10-12 | 清华大学 | Method for enriching medium and low grade phosphate ore based on mineral dissociation and modification |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071580A (en) * | 2013-01-30 | 2013-05-01 | 昆明理工大学 | Method for removing magnesium from phosphate ore |
| JP2014095108A (en) * | 2012-11-08 | 2014-05-22 | Koa Corp | Treatment apparatus for plating waste liquid and method of producing phosphoric acid containing fertilizer solution |
| CN107899538A (en) * | 2017-03-03 | 2018-04-13 | 侯英翔 | Mineral are produced with nonmetallic ore and cement plant raw materials for production make depositing dust and dust attractant materials |
-
2020
- 2020-11-12 CN CN202011257183.7A patent/CN112439552A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014095108A (en) * | 2012-11-08 | 2014-05-22 | Koa Corp | Treatment apparatus for plating waste liquid and method of producing phosphoric acid containing fertilizer solution |
| CN103071580A (en) * | 2013-01-30 | 2013-05-01 | 昆明理工大学 | Method for removing magnesium from phosphate ore |
| CN107899538A (en) * | 2017-03-03 | 2018-04-13 | 侯英翔 | Mineral are produced with nonmetallic ore and cement plant raw materials for production make depositing dust and dust attractant materials |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113492063A (en) * | 2021-06-02 | 2021-10-12 | 清华大学 | Method for enriching medium and low grade phosphate ore based on mineral dissociation and modification |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103071580B (en) | Method for removing magnesium from phosphate ore | |
| CN110369152B (en) | Flotation process for micro-fine particle phosphorite | |
| CN109453891B (en) | High sesqui-collophanite spiral chute re-floating combined process | |
| CN103909017A (en) | Flotation process for silicon-calcium mixed collophanite containing organic carbon | |
| CN111450987B (en) | Mineral separation process for medium-low grade mixed collophanite | |
| CN104511373A (en) | Mineral separation method for high-oxidative molybdenum ore | |
| CN112058503A (en) | Silico-calcium collophanite double-reverse flotation process | |
| CN106269286B (en) | Preparation method of sulfonated fatty acid phosphate reverse flotation collector | |
| CN110745820B (en) | Purification method of smokeless coal-based microcrystalline graphite for preparing lithium ion battery negative electrode material | |
| CN112439552A (en) | Phosphate rock acid triggering-cyclone demagging method | |
| CN102327809B (en) | Method for removing magnesium oxide from collophanite | |
| CN110028064B (en) | Method for purifying medium-grade graphite raw ore | |
| CN115780067A (en) | Efficient utilization method of micro-fine particle refractory weathered scheelite | |
| CN105750089A (en) | Magnesian collophanite separation method | |
| CN111389598A (en) | Method for recovering mica and feldspar quartz from rare metal ore dressing tailings | |
| CN111215247A (en) | Inhibitor for high-calcium fluorite direct flotation and flotation method | |
| CN111298978B (en) | Method for flotation of lepidolite without desliming | |
| CN107381525A (en) | Utilize the technique and device of mid-low grade collophanite ore production industrial monoammonium phosphate coproduction high-quality MAP | |
| CN106179731B (en) | The method of sesquichloride and magnesium in the single reverse flotation coupling abjection phosphorus ore of high-gradient magnetic separation | |
| CN106000659B (en) | A kind of magnesia low-grade phosphate ore floatation process of manganese | |
| CN111482277A (en) | Collecting agent for magnesium-silicon phosphate rock mixed reverse flotation, preparation method and beneficiation method | |
| CN103071597A (en) | Preparation method of high-purity copper sulfide | |
| CN1330984A (en) | Process for increasing anti-floatation effeciency of phosphate | |
| CN113617533B (en) | Phosphorite ore reverse flotation collector and use method thereof | |
| CN104815760A (en) | Collecting agent for magnetic impurity-contained copper oxide ore flotation process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210305 |