CN112007760A - Beneficiation method for treating high sesquioxide collophanite - Google Patents

Beneficiation method for treating high sesquioxide collophanite Download PDF

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CN112007760A
CN112007760A CN201910668679.4A CN201910668679A CN112007760A CN 112007760 A CN112007760 A CN 112007760A CN 201910668679 A CN201910668679 A CN 201910668679A CN 112007760 A CN112007760 A CN 112007760A
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flotation
acid
reverse
reverse flotation
positive
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李丰
田鹏杰
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Bluestar Lehigh Engineering Institute
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    • 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
    • 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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • 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
    • B03D1/002—Inorganic 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
    • B03D1/001—Flotation agents
    • B03D1/004—Organic compounds
    • B03D1/008—Organic compounds containing oxygen
    • 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
    • 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 relates to a mineral processing method for processing high sesquioxide collophanite, belonging to the technical field of mineral processing. The method can save water, can recycle all the wastewater and has low treatment cost. The process of the invention not only aims at the high sesquioxide collophanite, but also aims at the silico-calcium collophanite, and has the advantages of stable mineral processing process flow, good separation effect, low iron and aluminum semi-oxides in the concentrate product and the like compared with the conventional forward-reverse flotation process or double-reverse flotation process.

Description

Beneficiation method for treating high sesquioxide collophanite
Technical Field
The invention belongs to the technical field of mineral processing, and particularly relates to a beneficiation method for treating high sesquioxide collophanite.
Background
In China, phosphorite resources are mainly concentrated in Yunpixuan Xiangbei and other places, sedimentary phosphorite is taken as the main material, medium-grade and low-grade collophanite is taken as the main material, and part of low-grade siliceous collophanite contains aluminum-iron sesquioxide (R)2O3) In the traditional wet-process production of phosphoric acid, iron and aluminum elements not only can cause the phosphoric acid to form sludge, but also can greatly influence the growth of calcium sulfate crystals, and finally cause P in the subsequent concentration process2O5The loss is large, so in order to reduce the influence on the wet-process phosphoric acid and the acid-process fertilizer making process, the content of iron-containing and aluminum sesquioxide in the phosphate concentrate needs to be reduced as much as possible.
At present, aiming at high-aluminum high-iron low-grade silico-calcium collophanite, the conventionally adopted process flows are a forward-reverse flotation process flow and a pre-desliming-double-reverse flotation process flow, the forward-reverse flotation process has the defects of fine grinding fineness, fine granularity of concentrate products, difficult concentrate conveying and dewatering operation, high concentrate beneficiation cost and the like, the forward-reverse flotation process can normally operate only by virtue of a tailing pond, and a new phosphorite factory is difficult to review and batch the tailing pond. The process flow of the prior desliming-double reverse flotation process has poor medicament selectivity, great influence on the process flow by slime, and desliming operation P2O5Severe losses and final concentrate P2O5The recovery rate is lower.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a beneficiation method for treating high sesquioxide collophanite, which is more reasonable and efficient in process for removing silicate, carbonate and iron and aluminum gangue minerals in the collophanite.
The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to a beneficiation method for treating high sesquioxide collophanite, which is characterized by comprising the following steps: crushing, grinding and grading the raw ore, performing reverse flotation operation, grinding and grading the obtained reverse flotation rough concentrate again, performing direct flotation operation, and performing acid leaching operation on the obtained direct flotation rough concentrate to obtain the final phosphate concentrate.
The invention relates to a beneficiation method for treating high sesquioxide collophanite, which further adopts the following preferable technical scheme:
1. the acid adopted in the acid leaching operation is inorganic strong acid or organic strong acid, the inorganic strong acid is selected from one or more of sulfuric acid, hydrochloric acid, nitric acid and phosphoric acid, and the organic strong acid is selected from one or two of oxalic acid and citric acid.
2. The method is characterized in that two water return tanks and a high-level water tank are separately arranged and are respectively used for storing forward flotation return water and reverse flotation return water, the return water of the forward flotation return tank is only used for forward flotation, the return water of the reverse flotation return tank is only used for reverse flotation, and supernatant water of acid leaching operation is returned to the reverse flotation return tank or returned to the acid leaching operation for use; and the overflow of the water return tank returns to the high-level water tank and then flows into the corresponding process flow automatically.
3. The products in the tank of the reverse flotation operation are not directly fed into the forward flotation operation, but are dehydrated, and the water content of the reverse flotation rough concentrate is controlled to be 10% -16%.
4. The products in the tank of the direct flotation operation are not directly subjected to acid leaching operation, but are subjected to dehydration operation, and the water content of the direct flotation rough concentrate is controlled to be 10% -16%.
5. The grinding fineness of the ore grinding in the reverse flotation operation is 50.00-70.00% of-200 meshes; the grinding fineness of the ore grinding in the direct flotation operation is 80-98% of-200 meshes.
6. The inhibitor of the reverse flotation operation is inorganic acid, the inorganic acid is sulfuric acid, phosphoric acid or mixed acid of the sulfuric acid and the phosphoric acid, and the collecting agent is fatty acid soap organic matter; the positive flotation operation selects sodium carbonate as a pH regulator, water glass as an inhibitor of silicate minerals, polysaccharides and polyphenol organic polymers as an inhibitor of iron-containing minerals, and the collecting agent selects fatty acid soap organic matters.
7. The tailings subjected to the forward flotation and the tailings subjected to the reverse flotation adopt dry pile treatment, tailing pond storage or tailing filling methods according to actual conditions.
The invention relates to a beneficiation method for treating high sesquioxide collophanite, which preferably comprises the following steps:
(1) crushing raw ores, feeding the crushed raw ores into a first-stage ore grinding and grading operation, and then feeding the crushed raw ores into a reverse flotation operation;
(2) dehydrating the product in the tank in the reverse flotation operation to obtain reverse flotation rough concentrate, and determining a dehydration process for flotation froth, namely reverse flotation tailings according to a specific tailings treatment process;
(3) the filtrate generated in the reverse flotation dehydration operation is returned to the reverse flotation operation for use;
(4) the reverse flotation rough concentrate is fed into the second-stage grinding classification operation, then fed into the forward flotation operation, the concentrate and the tailings of the forward flotation operation are respectively fed into the dehydration operation, the product in the flotation tank is subjected to a dehydration process determined according to a specific tailing treatment process, the dehydrated product is the forward flotation tailings, and the flotation froth, namely the forward flotation concentrate, is subjected to the dehydration operation to form the forward flotation rough concentrate;
(5) the filtrate generated in the positive flotation dehydration operation is returned to the positive flotation operation for use;
(6) and (3) performing acid leaching on the direct flotation rough concentrate, performing dehydration after acid leaching, returning the supernatant to the process for use, and obtaining a dehydrated product, namely the final phosphate concentrate.
The invention relates to a beneficiation method for treating high sesquioxide collophanite, which further preferably comprises the following specific steps:
(1) crushing raw ore, feeding the crushed raw ore into a first-stage grinding and grading operation, controlling the fineness of the first-stage grinding to be 50.00-70.00% of-200 meshes, and feeding the ground ore pulp into a reverse flotation operation;
(2) performing dehydration operation on products in a tank in reverse flotation operation to obtain reverse flotation rough concentrates, determining a dehydration process for flotation foams, namely reverse flotation tailings according to a specific tailing treatment process, wherein an inhibitor in the reverse flotation operation selects inorganic acid, the inorganic acid is sulfuric acid, phosphoric acid or mixed acid of the sulfuric acid and the phosphoric acid, the using amount of the inorganic acid and the phosphoric acid is 5 kg/t-9 kg/t of raw ore, and a collecting agent selects fatty acid soap organic matters, and the using amount of the collecting agent is 500 g/t-2000 g/t of raw ore;
(3) filtrate generated in the reverse flotation dehydration operation is fed into a reverse flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an acidic high-level water tank, and the filtrate is returned to the reverse flotation operation for use through a reverse flotation backwater system;
(4) the reverse flotation rough concentrate is fed into a secondary grinding grading operation, the fineness of secondary grinding is controlled to be 80% -98% of minus 200 meshes, ground ore pulp is fed into a positive flotation operation, sodium carbonate is selected as a pH regulator for the positive flotation operation, the usage amount is 0 g/t-3000 g/t of raw ore, water glass is used as an inhibitor of silicate minerals, the usage amount is 1000 g/t-7000 g/t of raw ore, polysaccharides and polyphenol organic polymers are used as the inhibitor of iron-containing minerals, the usage amount is 30 g/t-500 g/t of raw ore, a collecting agent is selected from fatty acid soap organic matters, the usage amount is 500 g/t-2000 g/t of raw ore, the concentrate and tailings of the positive flotation operation are respectively fed into a dewatering operation, and products in a flotation tank are subjected to a dewatering process determined according to a specific tailing treatment process, the dehydrated product is positive flotation tailings, and flotation foam, namely positive flotation concentrate, is dehydrated to form positive flotation rough concentrate;
(5) filtrate generated in the positive flotation dehydration operation is fed into a positive flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an alkaline high-level water tank, and the filtrate is returned to the positive flotation process for use through a positive flotation backwater system;
(6) the direct flotation rough concentrate is subjected to acid leaching operation, dehydration operation is performed after acid leaching, supernatant is returned to the process for use, a dehydrated product is the final phosphate concentrate, the leaching acid is inorganic strong acid or organic strong acid, the inorganic strong acid is one or more of sulfuric acid, hydrochloric acid, nitric acid and phosphoric acid, and the organic strong acid is one or more of organic strong acids such as oxalic acid and/or citric acid.
The inventor researches and discovers that: the high sesquioxide silico-calcium collophanite ore has single mineral component, mainly comprises low-carbon fluorapatite, a small amount of carbon apatite and apatite, the gangue minerals are mainly divided into carbonate minerals, silicate minerals and iron-containing minerals, the carbonate minerals are mainly dolomite and calcite, the silicate minerals are mainly quartz and aluminosilicate clay minerals, and the iron-containing minerals are mainly pyrite and hematite. In the prior art, a forward-reverse flotation process or a pre-desliming-double-reverse flotation process is generally adopted for the ore of the type, and the forward-reverse flotation has the defects of fine grinding fineness, large reagent consumption, high ore dressing cost and unstable forward flotation operation process influenced by backwaterAnd the like, the process flow of the prior desliming-double reverse flotation process has poor medicament selectivity, the process is greatly influenced by the slime, and the desliming operation P2O5Serious loss, low aluminosilicate removal rate and the like. Therefore, the inventors have studied the technical solution of the present invention in view of the above technical problems.
The ore composition of the high sesquioxide silico-calcium collophanite ore in the method is as follows: p2O516.1-28.9% grade, 1.5-6.0% MgO mass content and SiO211.1-31.9% of Al2O31.0-6.8% of mass content and Fe2O3The mass content is 0.5% -3.9%;
p in collophanite concentrate obtained by the method of the invention2O532.5-36.9% of grade, 0.2-0.4% of MgO by mass and aluminum-containing and iron-containing sesquioxide (R)2O3) The mass content is 0.8% -1.5%.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) by adding an acid leaching process after the flotation process, the grade of phosphate concentrate can be further improved for various types of high-sesquioxide silico-calcium collophanite, especially for collophanite with high calcite content, and the method has the advantages of strong process adaptability and wide application range;
(2) the reverse-direct flotation process adopts single backwater, thereby effectively avoiding excessive Ca carried in the backwater of the reverse flotation2+、PO4 3-、SO4 2-The influence on the direct flotation of the phosphorite can be considered without arranging a tailing pond, so that the investment is saved. The invention has the advantages of simple process flow of backwater treatment, low investment cost, low operation effect and cost and the like, and is beneficial to the stable operation of the reverse-forward flotation process in the actual production.
(3) The flotation process selects that the reverse flotation operation is placed at the front part and the positive flotation operation is placed at the back part, so that the Ca which has great influence on the positive flotation process in the positive flotation return water can be greatly reduced2+、PO4 3-、SO4 2-The concentration of the ions is controlled by the ion concentration,is favorable for ensuring the stability of the direct flotation process flow. (4) A part of waste acid water generated in the acid leaching process can be returned to the acid leaching operation for use, and a part of waste acid water can be returned to the reverse flotation action to be used as a reverse flotation inhibitor, so that the use amount of acid in the reverse flotation can be reduced.
(5) The energy consumption of ore grinding occupies a large part of the ore dressing cost, through stage ore grinding and stage flotation, the over grinding of minerals is well avoided, the effective separation of useful minerals and gangue is well realized under the lower ore grinding fineness, the filtering operation of concentrate is improved, and the ore grinding cost of ore dressing is effectively reduced;
(6) by adding water glass, polysaccharides and polyphenol organic polymers as inhibitors of aluminosilicate minerals and iron-containing gangue minerals in the direct flotation desiliconization operation, the floating difference between useful minerals and gangue minerals is improved, and aluminum-containing and iron-containing sesquioxide (R) in the phosphorus concentrate is greatly reduced2O3) The content of (a).
Detailed Description
The following further describes particular 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 beneficiation process to treat high sesquioxide collophanite:
(1) crushing raw ore, and feeding the crushed raw ore into a first-stage grinding and grading operation, wherein the fineness of the first-stage grinding is controlled to be 55 percent of minus 200 meshes, and the ground ore pulp is fed into a reverse flotation operation;
(2) performing dehydration on products in a tank in the reverse flotation operation to obtain reverse flotation rough concentrates, determining a dehydration process for flotation foams (reverse flotation tailings) according to a specific tailing treatment process, wherein a reverse flotation operation inhibitor selects sulfuric acid with the use amount of 6kg/t of raw ores, and a collecting agent selects fatty acid soap organic matters with the use amount of 700g/t of raw ores;
(3) filtrate generated in the reverse flotation dehydration operation is fed into a reverse flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an acidic high-level water tank, and the filtrate is returned to the reverse flotation process for use through a reverse flotation backwater system;
(4) the rough concentrate of the reverse flotation is fed into a second-stage grinding grading operation, the fineness of the second-stage grinding is controlled to be 90 percent of minus 200 meshes, the ground ore pulp is fed into a positive flotation operation, the positive flotation operation regulator selects sodium carbonate as a pH regulator, the dosage is 2000g/t of raw ore, water glass as an inhibitor of silicate minerals, the dosage is 2500g/t of raw ore, polysaccharides and polyphenol organic polymers as an inhibitor of iron-containing minerals, the dosage is 50g/t of raw ore, a collecting agent selects fatty acid soap organic matters, the dosage is 850g/t of raw ore, the concentrate of the positive flotation operation, the tailings are respectively subjected to dehydration operation, products in the flotation tank are subjected to a dehydration process determined according to a specific tailing treatment process, the dehydrated products are positive flotation tailings, and flotation foams (positive flotation concentrates) are subjected to dehydration operation to form positive flotation rough concentrates;
(5) filtrate generated in the positive flotation dehydration operation is fed into a positive flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an alkaline high-level water tank, and the filtrate is returned to the positive flotation process for use through a positive flotation backwater system;
(6) the direct flotation rough concentrate is subjected to acid leaching operation, dehydration operation is carried out after acid leaching, supernatant is returned to the process for use, a dehydrated product is the final phosphate concentrate, and the leaching acid is mixed acid of sulfuric acid and phosphoric acid and is prepared according to the mass ratio of 1: 1.
(7) The reverse flotation process consists of primary roughing and primary recleaning operation, and the forward flotation consists of primary roughing and primary scavenging operation.
The ore composition of the high sesquioxide type collophanite in the method is P2O522.81% grade, 3.19% MgO mass content, SiO218.19% by mass of Al2O34.21% by mass of Fe2O3The mass content is 2.14 percent;
p in collophanite concentrate obtained by the method2O5Grade 33.55%, MgO content 0.25%, sesquioxide (R)2O3) The mass content is 1.41%.
Example 2, a beneficiation process to treat high sesquioxide collophanite:
(1) crushing raw ore, and feeding the crushed raw ore into a first-stage grinding and grading operation, wherein the fineness of the first-stage grinding is controlled to be 55 percent of minus 200 meshes, and the ground ore pulp is fed into a reverse flotation operation;
(2) performing dehydration on products in a tank in the reverse flotation operation to obtain reverse flotation rough concentrates, determining a dehydration process for flotation foams (reverse flotation tailings) according to a specific tailing treatment process, wherein a reverse flotation operation inhibitor selects sulfuric acid with the use amount of 6kg/t of raw ores, and a collecting agent selects fatty acid soap organic matters with the use amount of 800g/t of raw ores;
(3) filtrate generated in the reverse flotation dehydration operation is fed into a reverse flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an acidic high-level water tank, and the filtrate is returned to the reverse flotation process for use through a reverse flotation backwater system;
(4) the reverse flotation rough concentrate is fed into second-stage grinding grading operation, the fineness of the second-stage grinding is controlled to be 86 percent of minus 200 meshes, the ground ore pulp is fed into positive flotation operation, the positive flotation operation regulator selects sodium carbonate as a pH regulator, the dosage is 2000g/t raw ore, water glass as an inhibitor of silicate minerals, the dosage is 2000g/t raw ore, polysaccharides and polyphenol organic polymers as an inhibitor of iron-containing minerals, the dosage is 50g/t raw ore, a collecting agent selects fatty acid soap organic matters, the dosage is 800g/t raw ore, concentrate of the positive flotation operation, the tailings are respectively subjected to dehydration operation, products in the flotation tank are subjected to a dehydration process determined according to a specific tailing treatment process, the dehydrated products are positive flotation tailings, and flotation foams (positive flotation concentrates) are subjected to dehydration operation to form positive flotation rough concentrates;
(5) filtrate generated in the positive flotation dehydration operation is fed into a positive flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an alkaline high-level water tank, and the filtrate is returned to the positive flotation process for use through a positive flotation backwater system;
(6) the direct flotation rough concentrate is subjected to acid leaching operation, dehydration operation is carried out after acid leaching, supernatant is returned to the process for use, a dehydrated product is the final phosphate concentrate, and the leaching acid is mixed acid of sulfuric acid and phosphoric acid and is prepared according to the mass ratio of 1: 1.
(7) The reverse flotation process consists of primary roughing and primary recleaning operation, and the forward flotation consists of primary roughing and primary scavenging operation.
High oxygen sesqui-oxide in the above processThe ore composition of the compound type collophanite is P2O523.21% grade, 3.52% MgO mass content, SiO214.19% by mass of Al2O34.70% by mass of Fe2O3The mass content is 2.25%;
p in collophanite concentrate obtained by the method2O5Grade 34.55%, MgO content 0.25%, sesquioxide (R)2O3) The mass content is 1.29 percent.
Compared with the double reverse flotation process in the prior art, the method has the following data:
Figure 391216DEST_PATH_IMAGE002
embodiment 3, a beneficiation method to treat high sesquioxide collophanite:
(1) crushing raw ore, and feeding the crushed raw ore into a first-stage grinding and grading operation, wherein the fineness of the first-stage grinding is controlled to be-200 meshes and 60 percent, and feeding the ground ore pulp into a reverse flotation operation;
(2) performing dehydration on products in a tank in the reverse flotation operation to obtain reverse flotation rough concentrates, determining a dehydration process for flotation foams (reverse flotation tailings) according to a specific tailing treatment process, wherein a reverse flotation operation inhibitor selects sulfuric acid with the use amount of 6kg/t of raw ores, and a collecting agent selects fatty acid soap organic matters with the use amount of 900g/t of raw ores;
(3) filtrate generated in the reverse flotation dehydration operation is fed into a reverse flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an acidic high-level water tank, and the filtrate is returned to the reverse flotation process for use through a reverse flotation backwater system;
(4) the reverse flotation rough concentrate is fed into a second stage grinding grading operation, the fineness of the second stage grinding is controlled to be 90 percent of minus 200 meshes, the ground ore pulp is fed into a positive flotation operation, the positive flotation operation regulator selects sodium carbonate as a pH regulator, the dosage is 2500g/t of raw ore, water glass as an inhibitor of silicate minerals, the dosage is 2000g/t of raw ore, polysaccharides and polyphenol organic polymers as an inhibitor of iron-containing minerals, the dosage is 70g/t of raw ore, a collecting agent selects fatty acid soap organic matters, the dosage is 800g/t of raw ore, the concentrate of the positive flotation operation, the tailings are respectively subjected to dehydration operation, products in the flotation tank are subjected to a dehydration process determined according to a specific tailing treatment process, the dehydrated products are positive flotation tailings, and flotation foams (positive flotation concentrates) are subjected to dehydration operation to form positive flotation rough concentrates;
(5) filtrate generated in the positive flotation dehydration operation is fed into a positive flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an alkaline high-level water tank, and the filtrate is returned to the positive flotation process for use through a positive flotation backwater system;
(6) direct flotation rough concentrate is subjected to acid leaching operation, dehydration operation is performed after acid leaching, supernatant is returned to the process for use, a dehydrated product is the final phosphate concentrate, and leaching acid is sulfuric acid.
(7) The reverse flotation process consists of primary roughing and primary recleaning operation, and the forward flotation consists of primary roughing and primary scavenging operation.
The ore composition of the high sesquioxide type collophanite in the method is P2O523.21% grade, 3.52% MgO mass content, SiO214.19% by mass of Al2O34.70% by mass of Fe2O3The mass content is 2.25%;
p in collophanite concentrate obtained by the method2O5Grade 34.80%, MgO content 0.21%, half oxide (R)2O3) The mass content is 1.23%.
Embodiment 4, a beneficiation method to treat high sesquioxide collophanite:
(1) crushing raw ore, feeding the crushed raw ore into a first-stage grinding and grading operation, controlling the fineness of the first-stage grinding to be-200 meshes and 65%, and feeding the ground ore pulp into a reverse flotation operation;
(2) performing dehydration on products in a tank in reverse flotation operation to obtain reverse flotation rough concentrates, determining a dehydration process for flotation foams (reverse flotation tailings) according to a specific tailing treatment process, wherein a reverse flotation operation inhibitor selects mixed acid with the use amount of 5kg/t of raw ore, and a collecting agent selects fatty acid soap organic matters with the use amount of 850g/t of raw ore;
(3) filtrate generated in the reverse flotation dehydration operation is fed into a reverse flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an acidic high-level water tank, and the filtrate is returned to the reverse flotation process for use through a reverse flotation backwater system;
(4) the reverse flotation rough concentrate is fed into a second stage grinding grading operation, the fineness of the second stage grinding is controlled to be 90 percent of minus 200 meshes, the ground ore pulp is fed into a positive flotation operation, the positive flotation operation regulator selects sodium carbonate as a pH regulator, the dosage is 2500g/t of raw ore, water glass as an inhibitor of silicate minerals, the dosage is 2000g/t of raw ore, polysaccharides and polyphenol organic polymers as an inhibitor of iron-containing minerals, the dosage is 70g/t of raw ore, a collecting agent selects fatty acid soap organic matters, the dosage is 800g/t of raw ore, the concentrate of the positive flotation operation, the tailings are respectively subjected to dehydration operation, products in the flotation tank are subjected to a dehydration process determined according to a specific tailing treatment process, the dehydrated products are positive flotation tailings, and flotation foams (positive flotation concentrates) are subjected to dehydration operation to form positive flotation rough concentrates;
(5) filtrate generated in the positive flotation dehydration operation is fed into a positive flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an alkaline high-level water tank, and the filtrate is returned to the positive flotation process for use through a positive flotation backwater system;
(6) direct flotation rough concentrate is subjected to acid leaching operation, dehydration operation is performed after acid leaching, supernatant is returned to the process for use, a dehydrated product is the final phosphate concentrate, and leaching acid is sulfuric acid.
(7) The reverse flotation process consists of primary roughing and primary recleaning operation, and the forward flotation consists of primary roughing and primary scavenging operation.
The ore composition of the high sesquioxide type collophanite in the method is P2O523.21% grade, 3.52% MgO mass content, SiO214.19% by mass of Al2O34.70% by mass of Fe2O3The mass content is 2.25%;
p in collophanite concentrate obtained by the method2O534.89% grade, 0.20% MgO mass content, and a half oxide (R)2O3) The mass content is 1.22%.
Example 5, a beneficiation process to treat high sesquioxide collophanite:
(1) crushing raw ore, and feeding the crushed raw ore into a first-stage grinding and grading operation, wherein the fineness of the first-stage grinding is controlled to be-200 meshes and 60 percent, and feeding the ground ore pulp into a reverse flotation operation;
(2) performing dehydration on products in a tank in reverse flotation operation to obtain reverse flotation rough concentrates, determining a dehydration process for flotation foams (reverse flotation tailings) according to a specific tailing treatment process, wherein a reverse flotation operation inhibitor is phosphoric acid and used in an amount of 5kg/t of raw ores, and a collecting agent is fatty acid soap organic matters and used in an amount of 500g/t of raw ores;
(3) filtrate generated in the reverse flotation dehydration operation is fed into a reverse flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an acidic high-level water tank, and the filtrate is returned to the reverse flotation process for use through a reverse flotation backwater system;
(4) the rough concentrate of the reverse flotation is fed into a second-stage ore grinding grading operation, the fineness of the second-stage ore grinding is controlled to be 95 percent of minus 200 meshes, the ground ore pulp is fed into a positive flotation operation, the positive flotation operation regulator selects sodium carbonate as a pH regulator, the dosage is 1500g/t of raw ore, water glass as an inhibitor of silicate minerals, the dosage is 6000g/t of raw ore, polysaccharides and polyphenol organic polymers as an inhibitor of iron-containing minerals, the dosage is 80g/t of raw ore, a collecting agent selects fatty acid soap organic matters, the dosage is 1500g/t of raw ore, the concentrate of the positive flotation operation, the tailings are respectively subjected to dehydration operation, products in the flotation tank are subjected to a dehydration process determined according to a specific tailing treatment process, the dehydrated products are positive flotation tailings, and flotation foams (positive flotation concentrates) are subjected to dehydration operation to form positive flotation rough concentrates;
(5) filtrate generated in the positive flotation dehydration operation is fed into a positive flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an alkaline high-level water tank, and the filtrate is returned to the positive flotation process for use through a positive flotation backwater system;
(6) direct flotation rough concentrate is subjected to acid leaching operation, dehydration operation is performed after acid leaching, supernatant is returned to the process for use, a dehydrated product is the final phosphate concentrate, and leaching acid is sulfuric acid.
(7) The reverse flotation process consists of primary roughing and primary recleaning operation, and the forward flotation consists of primary roughing, primary concentrating and primary scavenging operation.
The ore composition of the high sesquioxide type collophanite in the method is P2O519.75% grade, 1.55% MgO mass content, SiO234.19 percent of Al2O33.79% by mass of Fe2O3The mass content is 1.92 percent;
p in collophanite concentrate obtained by the method2O5Grade 34.80%, MgO content 0.21%, half oxide (R)2O3) The mass content is 1.35%.
Compared with the forward and reverse flotation process in the prior art, the method has the following data:
Figure 573936DEST_PATH_IMAGE004
example 6, a beneficiation process to treat high sesquioxide collophanite:
(1) crushing raw ore, and feeding the crushed raw ore into a first-stage grinding and grading operation, wherein the fineness of the first-stage grinding is controlled to be-200 meshes and 60 percent, and feeding the ground ore pulp into a reverse flotation operation;
(2) performing dehydration on products in a tank in reverse flotation operation to obtain reverse flotation rough concentrates, determining a dehydration process for flotation foams (reverse flotation tailings) according to a specific tailing treatment process, wherein a reverse flotation operation inhibitor selects mixed acid with the use amount of 7kg/t of raw ore, and a collecting agent selects fatty acid soap organic matters with the use amount of 500g/t of raw ore;
(3) filtrate generated in the reverse flotation dehydration operation is fed into a reverse flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an acidic high-level water tank, and the filtrate is returned to the reverse flotation process for use through a reverse flotation backwater system;
(4) the rough concentrate of the reverse flotation is fed into a second-stage ore grinding grading operation, the fineness of the second-stage ore grinding is controlled to be 95 percent of minus 200 meshes, the ground ore pulp is fed into a positive flotation operation, the positive flotation operation regulator selects sodium carbonate as a pH regulator, the dosage is 2000g/t of raw ore, water glass as an inhibitor of silicate minerals, the dosage is 6000g/t of raw ore, polysaccharides and polyphenol organic polymers as an inhibitor of iron-containing minerals, the dosage is 80g/t of raw ore, a collecting agent selects fatty acid soap organic matters, the dosage is 1500g/t of raw ore, the concentrate of the positive flotation operation, the tailings are respectively subjected to dehydration operation, products in the flotation tank are subjected to a dehydration process determined according to a specific tailing treatment process, the dehydrated products are positive flotation tailings, and flotation foams (positive flotation concentrates) are subjected to dehydration operation to form positive flotation rough concentrates;
(5) filtrate generated in the positive flotation dehydration operation is fed into a positive flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an alkaline high-level water tank, and the filtrate is returned to the positive flotation process for use through a positive flotation backwater system;
(6) direct flotation rough concentrate is subjected to acid leaching operation, dehydration operation is performed after acid leaching, supernatant is returned to the process for use, a dehydrated product is the final phosphate concentrate, and leaching acid is sulfuric acid.
(7) The reverse flotation process consists of primary roughing and primary recleaning operation, and the forward flotation consists of primary roughing, primary concentrating and primary scavenging operation.
The ore composition of the high sesquioxide type collophanite in the method is P2O519.75% grade, 1.55% MgO mass content, SiO234.19 percent of Al2O33.79% by mass of Fe2O3The mass content is 1.92 percent;
p in collophanite concentrate obtained by the method2O5Grade 34.75%, MgO content 0.22%, half oxide (R)2O3) The mass content is 1.36%.

Claims (10)

1. A beneficiation method for treating high sesquioxide collophanite is characterized by comprising the following steps: crushing, grinding and grading the raw ore, performing reverse flotation operation, grinding and grading the obtained reverse flotation rough concentrate again, performing direct flotation operation, and performing acid leaching operation on the obtained direct flotation rough concentrate to obtain the final phosphate concentrate.
2. The beneficiation method for treating high sesquioxide collophanite according to claim 1, which is characterized in that: the acid adopted in the acid leaching operation is inorganic strong acid or organic strong acid, the inorganic strong acid is selected from one or more of sulfuric acid, hydrochloric acid, nitric acid and phosphoric acid, and the organic strong acid is selected from one or two of oxalic acid and citric acid.
3. The beneficiation method for treating high sesquioxide collophanite according to claim 1, which is characterized in that: the method is characterized in that two water return tanks and a high-level water tank are separately arranged and are respectively used for storing forward flotation return water and reverse flotation return water, the return water of the forward flotation return tank is only used for forward flotation, the return water of the reverse flotation return tank is only used for reverse flotation, and supernatant water of acid leaching operation is returned to the reverse flotation return tank or returned to the acid leaching operation for use; and the overflow of the water return tank returns to the high-level water tank and then flows into the corresponding process flow automatically.
4. The beneficiation method for treating high sesquioxide collophanite according to claim 1, which is characterized in that: the products in the tank of the reverse flotation operation are not directly fed into the forward flotation operation, but are dehydrated, and the water content of the reverse flotation rough concentrate is controlled to be 10% -16%.
5. The beneficiation method for treating high sesquioxide collophanite according to claim 1, which is characterized in that: the products in the tank of the direct flotation operation are not directly subjected to acid leaching operation, but are subjected to dehydration operation, and the water content of the direct flotation rough concentrate is controlled to be 10% -16%.
6. The beneficiation method for treating high sesquioxide collophanite according to claim 1, which is characterized in that: the grinding fineness of the ore grinding in the reverse flotation operation is 50.00-70.00% of-200 meshes; the grinding fineness of the ore grinding in the direct flotation operation is 80-98% of-200 meshes.
7. The beneficiation method for treating high sesquioxide collophanite according to claim 1, which is characterized in that: the inhibitor of the reverse flotation operation is inorganic acid, the inorganic acid is sulfuric acid, phosphoric acid or mixed acid of the sulfuric acid and the phosphoric acid, and the collecting agent is fatty acid soap organic matter; the positive flotation operation selects sodium carbonate as a pH regulator, water glass as an inhibitor of silicate minerals, polysaccharides and polyphenol organic polymers as an inhibitor of iron-containing minerals, and the collecting agent selects fatty acid soap organic matters.
8. The beneficiation method for treating high sesquioxide collophanite according to claim 1, which is characterized in that: the tailings subjected to the forward flotation and the tailings subjected to the reverse flotation adopt dry pile treatment, tailing pond storage or tailing filling methods according to actual conditions.
9. A beneficiation process for treating high sesquioxide collophanite according to any one of claims 1 to 8, wherein: the method comprises the following steps:
(1) crushing raw ores, feeding the crushed raw ores into a first-stage ore grinding and grading operation, and then feeding the crushed raw ores into a reverse flotation operation;
(2) dehydrating the product in the tank in the reverse flotation operation to obtain reverse flotation rough concentrate, and determining a dehydration process for flotation froth, namely reverse flotation tailings according to a specific tailings treatment process;
(3) the filtrate generated in the reverse flotation dehydration operation is returned to the reverse flotation operation for use;
(4) the reverse flotation rough concentrate is fed into the second-stage grinding classification operation, then fed into the forward flotation operation, the concentrate and the tailings of the forward flotation operation are respectively fed into the dehydration operation, the product in the flotation tank is subjected to a dehydration process determined according to a specific tailing treatment process, the dehydrated product is the forward flotation tailings, and the flotation froth, namely the forward flotation concentrate, is subjected to the dehydration operation to form the forward flotation rough concentrate;
(5) the filtrate generated in the positive flotation dehydration operation is returned to the positive flotation operation for use;
(6) and (3) performing acid leaching on the direct flotation rough concentrate, performing dehydration after acid leaching, returning the supernatant to the process for use, and obtaining a dehydrated product, namely the final phosphate concentrate.
10. The beneficiation method for treating high sesquioxide collophanite according to claim 9, which is characterized in that: the method comprises the following specific steps:
(1) crushing raw ore, feeding the crushed raw ore into a first-stage grinding and grading operation, controlling the fineness of the first-stage grinding to be 50.00-70.00% of-200 meshes, and feeding the ground ore pulp into a reverse flotation operation;
(2) performing dehydration operation on products in a tank in reverse flotation operation to obtain reverse flotation rough concentrates, determining a dehydration process for flotation foams, namely reverse flotation tailings according to a specific tailing treatment process, wherein an inhibitor in the reverse flotation operation selects inorganic acid, the inorganic acid is sulfuric acid, phosphoric acid or mixed acid of the sulfuric acid and the phosphoric acid, the using amount of the inorganic acid and the phosphoric acid is 5 kg/t-9 kg/t of raw ore, and a collecting agent selects fatty acid soap organic matters, and the using amount of the collecting agent is 500 g/t-2000 g/t of raw ore;
(3) filtrate generated in the reverse flotation dehydration operation is fed into a reverse flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an acidic high-level water tank, and the filtrate is returned to the reverse flotation operation for use through a reverse flotation backwater system;
(4) the reverse flotation rough concentrate is fed into a secondary grinding grading operation, the fineness of secondary grinding is controlled to be 80% -98% of minus 200 meshes, ground ore pulp is fed into a positive flotation operation, sodium carbonate is selected as a pH regulator for the positive flotation operation, the usage amount is 0 g/t-3000 g/t of raw ore, water glass is used as an inhibitor of silicate minerals, the usage amount is 1000 g/t-7000 g/t of raw ore, polysaccharides and polyphenol organic polymers are used as the inhibitor of iron-containing minerals, the usage amount is 30 g/t-500 g/t of raw ore, a collecting agent is selected from fatty acid soap organic matters, the usage amount is 500 g/t-2000 g/t of raw ore, the concentrate and tailings of the positive flotation operation are respectively fed into a dewatering operation, and products in a flotation tank are subjected to a dewatering process determined according to a specific tailing treatment process, the dehydrated product is positive flotation tailings, and flotation foam, namely positive flotation concentrate, is dehydrated to form positive flotation rough concentrate;
(5) filtrate generated in the positive flotation dehydration operation is fed into a positive flotation backwater sedimentation tank, overflow of the backwater sedimentation tank is fed into an alkaline high-level water tank, and the filtrate is returned to the positive flotation process for use through a positive flotation backwater system;
(6) the direct flotation rough concentrate is subjected to acid leaching operation, dehydration operation is carried out after acid leaching, supernatant is returned to the process for use, a dehydrated product is the final phosphate concentrate, the leaching acid is inorganic strong acid or organic strong acid, the inorganic strong acid is one or more of sulfuric acid, hydrochloric acid, nitric acid and phosphoric acid, and the organic strong acid is oxalic acid and/or citric acid.
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