CN114682386A - Grading and stepwise flotation method for treating middle-low grade silicon-calcium collophanite - Google Patents
Grading and stepwise flotation method for treating middle-low grade silicon-calcium collophanite Download PDFInfo
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- CN114682386A CN114682386A CN202011568758.7A CN202011568758A CN114682386A CN 114682386 A CN114682386 A CN 114682386A CN 202011568758 A CN202011568758 A CN 202011568758A CN 114682386 A CN114682386 A CN 114682386A
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- 238000005188 flotation Methods 0.000 title claims abstract description 241
- 238000000034 method Methods 0.000 title claims abstract description 72
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000012141 concentrate Substances 0.000 claims abstract description 87
- 230000002441 reversible effect Effects 0.000 claims abstract description 60
- 238000012216 screening Methods 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 32
- 230000008569 process Effects 0.000 claims abstract description 30
- 238000000227 grinding Methods 0.000 claims abstract description 24
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 14
- 239000011707 mineral Substances 0.000 claims abstract description 14
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 3
- 239000006260 foam Substances 0.000 claims description 28
- 229910019142 PO4 Inorganic materials 0.000 claims description 24
- 239000010452 phosphate Substances 0.000 claims description 24
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 22
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 19
- 235000019353 potassium silicate Nutrition 0.000 claims description 17
- 239000002253 acid Substances 0.000 claims description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 10
- 239000000194 fatty acid Substances 0.000 claims description 10
- 229930195729 fatty acid Natural products 0.000 claims description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
- 150000004676 glycans Chemical class 0.000 claims description 9
- 229920000620 organic polymer Polymers 0.000 claims description 9
- 150000008442 polyphenolic compounds Chemical class 0.000 claims description 9
- 235000013824 polyphenols Nutrition 0.000 claims description 9
- 229920001282 polysaccharide Polymers 0.000 claims description 9
- 239000005017 polysaccharide Substances 0.000 claims description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 239000011734 sodium Substances 0.000 claims description 8
- 150000004665 fatty acids Chemical class 0.000 claims description 6
- 239000000344 soap Substances 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 5
- 229910052906 cristobalite Inorganic materials 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052682 stishovite Inorganic materials 0.000 claims description 5
- 229910052905 tridymite Inorganic materials 0.000 claims description 5
- 229920001353 Dextrin Polymers 0.000 claims description 4
- 239000004375 Dextrin Substances 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 4
- 235000019425 dextrin Nutrition 0.000 claims description 4
- 239000003112 inhibitor Substances 0.000 claims description 4
- 150000007522 mineralic acids Chemical group 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- 235000010980 cellulose Nutrition 0.000 claims description 2
- -1 fatty acid sodium salts Chemical class 0.000 claims description 2
- 229920001277 pectin Polymers 0.000 claims description 2
- 239000001814 pectin Substances 0.000 claims description 2
- 235000010987 pectin Nutrition 0.000 claims description 2
- 230000002000 scavenging effect Effects 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 229920001864 tannin Polymers 0.000 claims description 2
- 239000001648 tannin Substances 0.000 claims description 2
- 235000018553 tannin Nutrition 0.000 claims description 2
- 125000005313 fatty acid group Chemical group 0.000 claims 2
- 238000011084 recovery Methods 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 230000002829 reductive effect Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 239000011575 calcium Substances 0.000 abstract 2
- 229910052791 calcium Inorganic materials 0.000 abstract 2
- 238000005265 energy consumption Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 7
- 239000002367 phosphate rock Substances 0.000 description 6
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920002261 Corn starch Polymers 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 239000008120 corn starch Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000002686 phosphate fertilizer Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 2
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
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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
- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- 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
- 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 classification step-by-step flotation method for treating middle-low grade silicon-calcium collophanite, which adopts a classification step-by-step flotation process, wherein raw ore is subjected to crushing operation and then is subjected to screening operation, and the raw ore is screened into two coarse and fine grade; and then removing silicate gangue minerals in the fine-grained materials by adopting direct flotation, performing direct flotation on the obtained direct flotation concentrate and the coarse-grained materials again to remove the silicate gangue minerals, and finally removing carbonate gangue minerals in the direct flotation concentrate by adopting reverse flotation. The process of the invention is not only suitable for the high-iron-aluminum silico-calcium collophanite, but also suitable for the weathering silico-calcium collophanite. Compared with the conventional forward-reverse flotation process, the fine-grained materials under the screen are sorted step by step for multiple times, so that the sorting property of the fine-grained materials is greatly improved, and the loss of the recovery rate caused by fine-grained mechanical entrainment in the flotation operation is reduced; in addition, the process reduces the energy consumption of ore grinding, thereby reducing the ore dressing cost. The process has the advantages of stable mineral processing process flow, good separation effect, high concentrate recovery rate, low iron and aluminum semi-oxides in concentrate products and the like.
Description
Technical Field
The invention belongs to the technical field of mineral processing, and particularly relates to a graded step-by-step flotation method for treating medium-low grade silicon-calcium collophanite.
Background
Phosphate fertilizer is an indispensable nutrient in agricultural production. Phosphate rock is used as the main raw material of phosphate fertilizer. At present, no matter can be found in the world to replace the traditional Chinese medicine. With the increase of the world population, the demand of phosphate fertilizers is continuously increased. China is a large country of phosphorite resources, but the phosphorus resources have the characteristic of being abundant but not rich, in China, the phosphorite resources are mainly concentrated in Yunyichuan Xiangbei and other places, sedimentary phosphorite is taken as the main part, medium and low grade collophanite is taken as the main part, and the medium and low grade phosphorite can be produced into qualified phosphate concentrate for phosphorus chemical industry through mineral separation and enrichment. Due to processing and engineering technical problems, the utilization rate of the resources is low.
At present, aiming at medium and low grade silicon-calcium collophanite, the conventionally adopted process flows are a forward-reverse flotation process flow and a pre-desliming-double-reverse flotation process flow, and the forward-reverse flotation process has the defects of fine grinding fineness, fine granularity of concentrate products, difficult operation of concentrate conveying and dehydration, high concentrate beneficiation cost and the like. 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. The conventional process flow has the technical problems of difficult thickening and difficult defoaming, the comprehensive technical and economic indexes are poor, and the stable production cannot be ensured.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a ore dressing method for medium and low grade silicon-calcium collophanite, which has more reasonable process, high efficiency and high separation property.
The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to a classification step-by-step flotation method for treating middle-low grade silicon-calcium collophanite, which is characterized by comprising the following steps: a classification step-by-step flotation process is adopted, raw ore is subjected to crushing operation and then is subjected to screening operation, and the raw ore is screened into a coarse fraction and a fine fraction; and then removing silicate gangue minerals in the fine-grained materials by adopting direct flotation, performing direct flotation on the obtained direct flotation concentrate and the coarse-grained materials again to remove the silicate gangue minerals, and finally removing carbonate gangue minerals in the direct flotation concentrate by adopting reverse flotation.
The invention relates to a grading and step-by-step flotation method for treating medium-low grade silicon-calcium collophanite, which further adopts the preferable technical scheme that: the ore type of the medium-low grade silicon-calcium collophanite is high-iron-aluminum silicon-calcium collophanite or weathering silicon-calcium collophanite.
The invention relates to a grading and step-by-step flotation method for treating medium-low grade silicon-calcium collophanite, which further adopts the preferable technical scheme that: the medium-low grade silico-calcareous collophanite ore comprises the following components: p2O516.2-24% grade, 1.0-5.9% MgO mass content and SiO2The mass content is 12% -39%.
The invention relates to a grading and step-by-step flotation method for treating medium-low grade silicon-calcium collophanite, which further adopts the preferable technical scheme that: the method is characterized by comprising the following specific steps:
(1) the raw ore is subjected to crushing operation and then is subjected to screening operation, wherein the concentration of the screening operation is 30.00-50.00%, and the raw ore is classified into the granularity of 0.074mm, 0.063mm or 0.045 mm;
(2) undersize fine-fraction materials obtained by screening operation are fed into a positive flotation stirring tank 1, and a regulator Na is sequentially added2CO3Regulating pH, wherein the adding amount is 1000-3000g/t, adding a polysaccharide and polyphenol organic polymer regulator, the adding amount is 20-50g/t, adding water glass to inhibit silicate, the adding amount is 200-5000 g/t, adding a positive flotation collector, the adding amount is 500-2500 g/t, and then performing positive flotation operation 1, wherein a foam product is positive flotation concentrate 1, and a product in a tank is positive flotation tailing 1;
(3) the coarse fraction material obtained by the screening operation enters the ore grinding operation,the grinding fineness of minus 0.074mm accounts for 70-90%, and the ground material and the direct flotation concentrate 1 are mixed and fed into a direct flotation stirring tank 2; sequentially adding Na2CO3Adjusting the pH value, adding water glass to inhibit silicate at the amount of 100-4000 g/t, adding a positive flotation collecting agent at the amount of 500-2500 g/t, and then performing positive flotation 2, wherein a foam product is positive flotation concentrate 2, and a product in a cell is positive flotation tailing 2;
(4) and feeding the direct flotation concentrate 2 into a reverse flotation demagging stirring tank, adding acid to adjust the pH value, wherein the adding amount is 4000-8000g/t, adding a reverse flotation collecting agent, wherein the adding amount is 100-500 g/t, and then performing reverse flotation operation, wherein a foam product is demagging reverse flotation tailings, and a product in the tank is demagging reverse flotation concentrate, namely final phosphate concentrate.
The invention relates to a grading and step-by-step flotation method for treating medium-low grade silicon-calcium collophanite, which further adopts the preferable technical scheme that: the method comprises the following specific steps:
(1) the raw ore is subjected to crushing operation and then is subjected to screening operation, the concentration of the screening operation is 35.00-45.00%, and the raw ore is classified into the granularity of 0.074mm or 0.063mm or 0.045 mm;
(2) undersize fine-fraction materials obtained by screening operation are fed into a positive flotation stirring tank 1, and a regulator Na is sequentially added2CO3Adjusting the pH value, adding the pH value to be 2000-2500g/t, adding a polysaccharide and a polyphenol organic polymer regulator with the addition of 30-45g/t, adding water glass to inhibit silicate with the addition of 1000-4000 g/t, adding a direct flotation collecting agent with the addition of 1000-1500 g/t, and then performing direct flotation operation 1, wherein a foam product is direct flotation concentrate 1, and a product in a cell is direct flotation tailing 1;
(3) the coarse fraction materials obtained by the screening operation enter the ore grinding operation, the ore grinding fineness is 75-85% of-0.074 mm, and the ground materials and the direct flotation concentrate 1 are mixed and fed into a direct flotation stirring tank 2; sequentially adding Na2CO3Adjusting the pH value to 1500-2000g/t, adding water glass to inhibit silicate with the addition of 1000-3000g/t, adding a positive flotation collecting agent with the addition of 500-1500 g/t, and then performing positive flotation 2, wherein a foam product is positive flotation concentrate 2, and a product in a cell is positive flotation concentrate 2Flotation of tailings 2;
(4) and feeding the direct flotation concentrate 2 into a reverse flotation demagging tank, adding acid to adjust the pH value, wherein the adding amount is 4000-6000g/t, adding a reverse flotation collecting agent, wherein the adding amount is 200-300 g/t, and then performing reverse flotation operation, wherein a foam product is demagging reverse flotation tailings, and a product in the tank is demagging reverse flotation concentrate, namely final phosphate concentrate.
The invention relates to a grading and step-by-step flotation method for treating medium-low grade silicon-calcium collophanite, which further adopts the preferable technical scheme that: the regulator polysaccharides and polyphenols organic polymer selected in step (2) are selected from starch, cellulose, dextrin, tannin, pectin, and the collector is C12-C20Higher fatty acids or fatty acid sodium salts.
The invention relates to a grading and step-by-step flotation method for treating medium-low grade silicon-calcium collophanite, which further adopts the preferable technical scheme that: and (3) in the step (2), the collector is fatty acid soap organic matters in the direct flotation operation 2.
The invention relates to a grading and step-by-step flotation method for treating medium-low grade silicon-calcium collophanite, which further adopts the preferable technical scheme that: in the reverse flotation process, the inhibitor is inorganic acid, the inorganic acid is sulfuric acid, phosphoric acid or a mixed acid of the sulfuric acid and the phosphoric acid, and the collecting agent is fatty acid soap organic matter.
The invention relates to a grading and step-by-step flotation method for treating medium-low grade silicon-calcium collophanite, which further adopts the preferable technical scheme that: the flow structure of the direct flotation and the reverse flotation is roughing operation or is formed by arbitrary matching of the roughing operation, the fine flotation operation and the scavenging operation.
The invention relates to a grading and step-by-step flotation method for treating medium-low grade silicon-calcium collophanite, which further adopts the preferable technical scheme that: the ore composition of the silicon-calcium collophanite is P2O517.5-22.5% grade, 1.5-3.0% MgO mass content and SiO2The mass content is 22.0% -38.5%.
The invention combines the phosphate ore classification with the multi-step flotation process, provides a classification step-by-step flotation method aiming at the middle-low grade silicon-calcium collophanite, and compared with the traditional process, the process has the following three advantages:
(1) the beneficiation cost is reduced: the phosphorite which is dissociated by monomers is screened out in advance through grading operation, if a direct flotation process is adopted, ore grinding operation needs to be added before flotation, and the cost of grading the part of the ore which is dissociated by monomers is at least half lower than that of ore grinding.
(2) The particle size of the undersize fine-fraction minerals is controlled within a narrow range through grading operation, so that the adverse influence of the argillization of weathered phosphate ores on flotation can be effectively avoided. The grading and multi-step flotation of fine-grained minerals greatly improves the sorting property and has the advantages of high comprehensive concentrate recovery rate and low iron and aluminum semi-oxides in concentrate products.
(3) The flotation operation adopts polysaccharide and polyphenol organic polymers as regulators, so that the fine-grained flotation environment can be effectively improved, and the recovery rate loss caused by fine-grained mechanical entrainment in the flotation operation is reduced.
The comprehensive phosphate concentrate P obtained by the method of the invention2O5The grade is 28.0-31.5%, the MgO mass content is 0.3-1.5%, and the phosphate concentrate P2O5The recovery rate is 75.0-85.0%.
Detailed Description
The following examples further describe specific embodiments of the present invention to enable those skilled in the art to further understand the present invention, but should not be construed as limiting the claims of the present invention.
Embodiment 1, a classification step-by-step flotation method for treating middle-low grade silicon-calcium collophanite, which comprises the following steps:
(1) the raw ore is subjected to crushing operation and then is subjected to screening operation, the concentration of the screening operation is 38.00 percent, and the granularity of 0.074mm is graded;
(2) fine-grained material of-0.074 mm obtained by screening is fed into a positive flotation stirring tank 1, and a regulator Na is added in sequence2CO3Adjusting pH to 2000g/t, adding dextrin as modifier to improve fine-fraction flotation environment at 30g/t, and adding 2% water glass inhibiting silicate500g/t, adding a positive flotation collecting agent with the addition of 1100g/t, and then performing positive flotation operation 1, wherein a foam product is positive flotation concentrate 1, and a product in a cell is positive flotation tailings 1;
(3) the coarse fraction material obtained by the screening operation enters the grinding operation, the grinding fineness is-0.074 mm and accounts for 78%, and the ground material and the direct flotation concentrate 1 are mixed and fed into a direct flotation stirring tank 2; sequentially adding Na2CO3Adjusting pH, wherein the adding amount is 1500g/t, the adding amount of water glass inhibits silicate, the adding amount is 1500g/t, then adding a direct flotation collecting agent, the adding amount is 1300g/t, then performing direct flotation operation 2, wherein a foam product is direct flotation concentrate 2, and a product in a tank is direct flotation tailing 2;
(4) and feeding the direct flotation concentrate 2 into a reverse flotation demagging stirring tank, adding acid to adjust the pH value, adding a reverse flotation collector in an amount of 220g/t, and performing reverse flotation operation, wherein a foam product is demagging reverse flotation tailings, and a product in the tank is demagging reverse flotation concentrate, namely final phosphate concentrate.
In the above method, the ore composition of the silicon-calcium collophanite is P2O5Grade of 18.5 percent, MgO mass content of 2.0 percent and SiO2The mass content is 35 percent;
p in the comprehensive phosphate concentrate obtained by the method2O529.3 percent of grade, 0.55 percent of MgO mass content and comprehensive phosphate concentrate P2O5The recovery rate was 85.5%.
Embodiment 2, a classification step-by-step flotation method for treating middle-low grade silicon-calcium collophanite, which comprises the following steps:
(1) crushing the raw ore, and then feeding the raw ore into screening operation, wherein the concentration of the screening operation is 40.00%, and the raw ore is classified into 0.074mm of granularity;
(2) fine-grained material of-0.074 mm obtained by screening is fed into a positive flotation stirring tank 1, and a regulator Na is added in sequence2CO3Adjusting pH value to 2000g/t, adding corn starch as a regulator to improve fine-grained flotation environment, adding 35g/t of sodium silicate inhibiting silicate, adding 2000g/t of sodium silicate inhibiting silicate, adding 1000g/t of direct flotation collecting agent, and performing direct flotation operation 1, wherein the foam product isPerforming direct flotation on concentrate 1, wherein products in a tank are direct flotation tailings 1;
(3) the coarse fraction material obtained by the screening operation enters the ore grinding operation, the ore grinding fineness is-0.074 mm and accounts for 85 percent, and the material after the ore grinding and the direct flotation concentrate 1 are mixed and fed into a direct flotation stirring tank 2; sequentially adding Na2CO3Adjusting pH, wherein the adding amount is 1500g/t, the adding amount of water glass inhibits silicate, the adding amount is 1500g/t, then adding a direct flotation collecting agent, the adding amount is 1100g/t, then performing direct flotation operation 2, wherein a foam product is direct flotation concentrate 2, and a product in a tank is direct flotation tailings 2;
(4) and feeding the direct flotation concentrate 2 into a reverse flotation demagging stirring tank, adding acid to adjust the pH value, adding a reverse flotation collector in an amount of 150g/t, and performing reverse flotation, wherein a foam product is demagging reverse flotation tailings, and a product in the tank is demagging reverse flotation concentrate, namely final phosphate concentrate.
In the above method, the ore composition of the silicon-calcium collophanite is P2O5The grade is 19.5 percent, the MgO mass content is 1.8 percent, and SiO is2The mass content is 34.5%;
p in the comprehensive phosphate concentrate obtained by the method2O529.0 percent of grade, 0.48 percent of MgO mass content and comprehensive phosphate concentrate P2O5The recovery was 77.3%.
Embodiment 3, a classification step-by-step flotation method for treating middle-low grade silicon-calcium collophanite, which comprises the following steps:
(1) the raw ore is subjected to crushing operation and then is subjected to screening operation, the concentration of the screening operation is 35.00%, and the granularity of 0.063mm is graded;
(2) fine-grained material of-0.063 mm obtained by screening operation is fed into positive flotation stirring tank 1, and then regulating agent Na is added in turn2CO3Adjusting pH, wherein the adding amount is 2000g/t, adding dextrin serving as a regulator to improve the fine-grained flotation environment, the adding amount is 35g/t, adding silicate into water glass to inhibit silicate, the adding amount is 2200g/t, adding a direct flotation collector, the adding amount is 1000g/t, then performing direct flotation operation 1, wherein a foam product is direct flotation concentrate 1, and a product in a cell is direct flotation tailing 1;
(3) screening operation is obtainedThe oversize coarse fraction material enters grinding operation, the grinding fineness is-0.074 mm and accounts for 78%, and the ground material and the direct flotation concentrate 1 are mixed and fed into a direct flotation stirring tank 2; sequentially adding Na2CO3Adjusting pH, wherein the adding amount is 1500g/t, the adding amount of water glass inhibits silicate, the adding amount is 1500g/t, then adding a direct flotation collecting agent, the adding amount is 1300g/t, then performing direct flotation operation 2, wherein a foam product is direct flotation concentrate 2, and a product in a tank is direct flotation tailing 2;
(4) and feeding the direct flotation concentrate 2 into a reverse flotation demagging stirring tank, adding acid to adjust the pH value, adding a reverse flotation collector in an amount of 220g/t, and performing reverse flotation operation, wherein a foam product is demagging reverse flotation tailings, and a product in the tank is demagging reverse flotation concentrate, namely final phosphate concentrate.
In the above method, the ore composition of the silicon-calcium collophanite is P2O5Grade of 18.5 percent, MgO mass content of 2.0 percent and SiO2The mass content is 35.0 percent;
p in the comprehensive phosphate concentrate obtained by the method2O529.2 percent of grade, 0.54 percent of MgO mass content and comprehensive phosphate concentrate P2O5The recovery was 83.8%.
Embodiment 4, a classification step-by-step flotation method for treating middle-low grade silicon-calcium collophanite, which comprises the following steps:
(1) the raw ore is subjected to crushing operation and then is subjected to screening operation, the concentration of the screening operation is 40.00 percent, and the raw ore is classified into 0.045mm of granularity;
(2) fine-grained material of-0.045 mm obtained by screening operation is fed into a positive flotation stirring tank 1, and a regulator Na is added in sequence2CO3Adjusting pH, wherein the adding amount is 2000g/t, adding an adjusting agent corn starch to improve the fine-grained flotation environment, the adding amount is 32g/t, adding water glass to inhibit silicate, the adding amount is 2000g/t, adding a direct flotation collecting agent, the adding amount is 1000g/t, then performing direct flotation operation 1, wherein a foam product is direct flotation concentrate 1, and a product in a cell is direct flotation tailing 1;
(3) the coarse fraction material obtained by the screening operation enters the ore grinding operation, the ore grinding fineness is-0.074 mm and accounts for 85 percent, and the material after the ore grinding and the direct flotation concentrateOre 1 is mixed and fed into a positive flotation stirring tank 2; sequentially adding Na2CO3Adjusting pH, wherein the adding amount is 1500g/t, the adding amount of water glass inhibits silicate, the adding amount is 1500g/t, then adding a direct flotation collecting agent, the adding amount is 1100g/t, then performing direct flotation operation 2, wherein a foam product is direct flotation concentrate 2, and a product in a tank is direct flotation tailings 2;
(4) and feeding the direct flotation concentrate 2 into a reverse flotation demagging stirring tank, adding acid to adjust the pH value, adding a reverse flotation collector in an amount of 150g/t, and performing reverse flotation, wherein a foam product is demagging reverse flotation tailings, and a product in the tank is demagging reverse flotation concentrate, namely final phosphate concentrate.
In the above method, the ore composition of the silicon-calcium collophanite is P2O5The grade is 19.5 percent, the MgO mass content is 1.8 percent, and SiO is2The mass content is 34.5%;
the method obtains P in the comprehensive phosphate concentrate2O529.1 percent of grade, 0.45 percent of MgO mass content and comprehensive phosphate concentrate P2O5The recovery was 76.7%.
Example 5, a classification step-by-step flotation method for treating middle-low grade silicon-calcium collophanite, compared with the effect of the conventional direct and reverse flotation process, the data are shown in table one:
(1) the conventional positive and negative process comprises the following steps: the grinding fineness is 90 percent of-0.074 mm grade; in the direct flotation process, the pH value is 9.5, the dosage of a pH regulator sodium carbonate is 3000g/t, and the dosage of an inhibitor water glass is 2500 kg/t; the dosage of the collector C18 unsaturated fatty acid saponified substance is 2000 kg/t. And (4) after size mixing, feeding the mixture into a direct flotation tank for direct flotation operation, wherein the foam product is direct flotation concentrate, and the product in the tank is direct flotation tailings. And (3) feeding the concentrate subjected to the forward flotation into a reverse flotation demagging tank, adding acid to adjust the pH value, adding a reverse flotation collector, adding 250g/t of the reverse flotation collector, and performing reverse flotation, wherein a foam product is demagging reverse flotation tailings, and a product in the tank is demagging reverse flotation concentrate, namely final phosphate concentrate.
(2) As a result, the raw ore P was2O5The grade is 18.5 percent, and the concentrate P is obtained after flotation2O5Grade of 27.5%, flotation concentrate P2O5The recovery was 71.8%.
TABLE-comparative test results
The comparative test shows that: by using the process, the grade of the concentrate P2O5 can be improved by about 2 percent, the recovery rate of P2O5 can be improved by more than 13 percent, and the economic benefit is very obvious.
Example 6, a classification step-by-step flotation method for treating middle-low grade silico-calcareous collophanite, compared with the effect of the conventional direct-reverse flotation process, the data are shown in table two:
(1) the conventional positive and negative process comprises the following steps: the grinding fineness is 85 percent of-0.074 mm grade; in the direct flotation process, the pH value is 9.5, the dosage of a pH regulator sodium carbonate is 3000g/t, and the dosage of an inhibitor water glass is 4500 g/t; the dosage of the collector C18 unsaturated fatty acid saponified substance is 2000 g/t. And (4) after size mixing, feeding the mixture into a direct flotation tank for direct flotation operation, wherein the foam product is direct flotation concentrate, and the product in the tank is direct flotation tailings. And (3) feeding the concentrate subjected to the forward flotation into a reverse flotation demagging tank, adding acid to adjust the pH value, adding a reverse flotation collector in an amount of 150g/t, and performing reverse flotation, wherein a foam product is demagging reverse flotation tailings, and a product in the tank is demagging reverse flotation concentrate, namely final phosphate concentrate.
(2) As a result, the raw ore P was2O5The grade is 19.5 percent, and the concentrate P is obtained after flotation2O5Grade of 28.8%, flotation concentrate P2O5The recovery was 71.3%.
TABLE II comparative test results
The comparative test shows that: by using the process, the grade of the concentrate P2O5 can be improved by about 0.2 percent, the recovery rate of P2O5 can be improved by about 6 percent, and the economic benefit is very obvious.
In the above embodiment: the grading and screening operation adopts a vibrating screen and a high-frequency fine screen, the regulator 2 adopts polysaccharides and polyphenol organic polymers as regulators, and the collecting agent adopts fatty acid soap organic matters.
It should be understood that various changes, modifications, substitutions and alterations can be made herein without departing from the principles of the invention, the scope of which is defined by the appended claims and their equivalents. The regulator 2 is prepared from polysaccharides and polyphenols organic polymers, and the collector is fatty acid soap organic matter.
Claims (9)
1. A classification step-by-step flotation method for treating middle-low grade silicon-calcium collophanite is characterized in that: a classification step-by-step flotation process is adopted, raw ore is subjected to crushing operation and then is subjected to screening operation, and the raw ore is screened into a coarse fraction and a fine fraction; and then removing silicate gangue minerals in the fine-grained materials by adopting direct flotation, performing direct flotation on the obtained direct flotation concentrate and the coarse-grained materials again to remove the silicate gangue minerals, and finally removing carbonate gangue minerals in the direct flotation concentrate by adopting reverse flotation.
2. The classification step-by-step flotation method for treating the medium-low grade silicon-calcium collophanite according to claim 1 is characterized in that: the ore type of the medium-low grade silicon-calcium collophanite is high-iron-aluminum silicon-calcium collophanite or weathering silicon-calcium collophanite.
3. The classification step-by-step flotation method for treating the medium-low grade silicon-calcium collophanite according to claim 2 is characterized in that: the medium-low grade silicon-calcium collophanite ore comprises the following components: p2O516.2-24% grade, 1.0-5.9% MgO mass content and SiO2The mass content is 12% -39%.
4. The fractional and step flotation method for treating middle-low grade silico-calcareous collophanite according to claim 1, 2 or 3 is characterized by comprising the following specific steps:
(1) the raw ore is subjected to crushing operation and then is subjected to screening operation, wherein the concentration of the screening operation is 30.00-50.00%, and the raw ore is classified into the granularity of 0.074mm, 0.063mm or 0.045 mm;
(2) undersize fine-fraction materials obtained by screening operation are fed into a positive flotation stirring tank 1, and a regulator Na is sequentially added2CO3Regulating the pH value, wherein the adding amount is 1000-3000g/t, adding a polysaccharide and a polyphenol organic polymer regulator, the adding amount is 20-50g/t, adding water glass to inhibit silicate, the adding amount is 200-5000 g/t, adding a direct flotation collecting agent, the adding amount is 500-2500 g/t, then performing direct flotation operation 1, wherein a foam product is direct flotation concentrate 1, and a product in a cell is direct flotation tailing 1;
(3) the coarse fraction materials obtained by the screening operation enter the ore grinding operation, the ore grinding fineness is 70-90% of-0.074 mm, and the ground materials and the direct flotation concentrate 1 are mixed and fed into a direct flotation stirring tank 2; sequentially adding Na2CO3Adjusting the pH value, adding water glass to inhibit silicate at the amount of 100-4000 g/t, adding a positive flotation collecting agent at the amount of 500-2500 g/t, and then performing positive flotation 2, wherein a foam product is positive flotation concentrate 2, and a product in a cell is positive flotation tailing 2;
(4) and feeding the direct flotation concentrate 2 into a reverse flotation demagging stirring tank, adding acid to adjust the pH value, wherein the adding amount is 4000-8000g/t, adding a reverse flotation collecting agent, wherein the adding amount is 100-500 g/t, and then performing reverse flotation operation, wherein a foam product is demagging reverse flotation tailings, and a product in the tank is demagging reverse flotation concentrate, namely final phosphate concentrate.
5. The classification step-by-step flotation method for treating the medium-low grade silicon-calcium collophanite according to claim 4 is characterized by comprising the following specific steps:
(1) the raw ore is subjected to crushing operation and then is subjected to screening operation, wherein the concentration of the screening operation is 35.00-45.00%, and the raw ore is classified into the granularity of 0.074mm, 0.063mm or 0.045 mm;
(2) undersize fine-fraction materials obtained by screening operation are fed into a positive flotation stirring tank 1, and a regulator Na is sequentially added2CO3Adjusting the pH value, adding the pH value to be 2000-2500g/t, adding a polysaccharide and a polyphenol organic polymer regulator with the addition of 30-45g/t, adding water glass to inhibit silicate with the addition of 1000-4000 g/t, adding a direct flotation collecting agent with the addition of 1000-1500 g/t, and then performing direct flotation operation 1, wherein a foam product is direct flotation concentrate 1, and a product in a cell is direct flotation tailing 1;
(3) the coarse fraction materials obtained by the screening operation enter the ore grinding operation, the ore grinding fineness is 75-85% of-0.074 mm, and the ground materials and the direct flotation concentrate 1 are mixed and fed into a direct flotation stirring tank 2; sequentially adding Na2CO3Adjusting the pH value, wherein the adding amount is 1500-2000g/t, adding water glass to inhibit silicate, the adding amount is 1000-3000g/t, adding a direct flotation collecting agent, the adding amount is 500-1500 g/t, then performing direct flotation operation 2, wherein a foam product is direct flotation concentrate 2, and a product in a cell is direct flotation tailing 2;
(4) and feeding the direct flotation concentrate 2 into a reverse flotation demagging tank, adding acid to adjust the pH value, wherein the adding amount is 4000-6000g/t, adding a reverse flotation collecting agent, wherein the adding amount is 200-300 g/t, and then performing reverse flotation operation, wherein a foam product is demagging reverse flotation tailings, and a product in the tank is demagging reverse flotation concentrate, namely final phosphate concentrate.
6. The graded and step-by-step flotation method for treating medium-low grade silico-calcareous collophanite according to claim 4 is characterized in that: the regulator polysaccharides and polyphenols organic polymer selected in step (2) are selected from starch, cellulose, dextrin, tannin, pectin, and the collector is C12-C20Higher fatty acids or fatty acid sodium salts.
7. The classification step-by-step flotation method for treating the medium-low grade silicon-calcium collophanite according to claim 4 is characterized in that: and (3) in the step (2), the collector is fatty acid soap organic matters in the direct flotation operation 2.
8. The graded step-by-step flotation method for treating the medium-low grade silico-calcareous collophanite according to claim 4, characterized in that in the reverse flotation, the inhibitor is selected from inorganic acid, the inorganic acid is sulfuric acid, phosphoric acid or mixed acid of the sulfuric acid and the phosphoric acid, and the collector is selected from fatty acid soap organic matters.
9. The graded and step-by-step flotation method for treating medium-low grade silico-calcareous collophanite according to claim 4 is characterized in that: the flow structure of the direct flotation and the reverse flotation is roughing operation or is formed by arbitrary matching of the roughing operation, the fine flotation operation and the scavenging operation.
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| US4317715A (en) * | 1977-11-22 | 1982-03-02 | Outokumpu Oy | Process for the selective froth-flotation of phosphate and carbonate minerals from finely-divided phosphate-carbonate-silicate ores or concentrates |
| CN103949318A (en) * | 2014-04-25 | 2014-07-30 | 中蓝连海设计研究院 | Method for performing fine sieving, regrinding and bulk flotation on low-level silicon calcium collophanite |
| CN106269265A (en) * | 2016-08-18 | 2017-01-04 | 中蓝连海设计研究院 | A kind of classification stepped-flotation separation technique processing high alumina high ferro silicon calcium collophanite |
| CN112007760A (en) * | 2019-07-23 | 2020-12-01 | 中蓝连海设计研究院有限公司 | Beneficiation method for treating high sesquioxide collophanite |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4317715A (en) * | 1977-11-22 | 1982-03-02 | Outokumpu Oy | Process for the selective froth-flotation of phosphate and carbonate minerals from finely-divided phosphate-carbonate-silicate ores or concentrates |
| CN103949318A (en) * | 2014-04-25 | 2014-07-30 | 中蓝连海设计研究院 | Method for performing fine sieving, regrinding and bulk flotation on low-level silicon calcium collophanite |
| CN106269265A (en) * | 2016-08-18 | 2017-01-04 | 中蓝连海设计研究院 | A kind of classification stepped-flotation separation technique processing high alumina high ferro silicon calcium collophanite |
| CN112007760A (en) * | 2019-07-23 | 2020-12-01 | 中蓝连海设计研究院有限公司 | Beneficiation method for treating high sesquioxide collophanite |
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