CN115007307A - Beneficiation and recovery method for high-calcium fluorite ore - Google Patents
Beneficiation and recovery method for high-calcium fluorite ore Download PDFInfo
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- CN115007307A CN115007307A CN202210607658.3A CN202210607658A CN115007307A CN 115007307 A CN115007307 A CN 115007307A CN 202210607658 A CN202210607658 A CN 202210607658A CN 115007307 A CN115007307 A CN 115007307A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000011084 recovery Methods 0.000 title claims abstract description 24
- 239000003112 inhibitor Substances 0.000 claims abstract description 69
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 54
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 54
- PUKLDDOGISCFCP-JSQCKWNTSA-N 21-Deoxycortisone Chemical compound C1CC2=CC(=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@@](C(=O)C)(O)[C@@]1(C)CC2=O PUKLDDOGISCFCP-JSQCKWNTSA-N 0.000 claims abstract description 48
- FCYKAQOGGFGCMD-UHFFFAOYSA-N Fulvic acid Natural products O1C2=CC(O)=C(O)C(C(O)=O)=C2C(=O)C2=C1CC(C)(O)OC2 FCYKAQOGGFGCMD-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229940095100 fulvic acid Drugs 0.000 claims abstract description 48
- 239000002509 fulvic acid Substances 0.000 claims abstract description 48
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 44
- 235000009134 Myrica cerifera Nutrition 0.000 claims abstract description 43
- 244000061457 Solanum nigrum Species 0.000 claims abstract description 43
- 239000010436 fluorite Substances 0.000 claims abstract description 43
- 238000005188 flotation Methods 0.000 claims abstract description 32
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 27
- 239000011707 mineral Substances 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000012141 concentrate Substances 0.000 claims abstract description 23
- 229910021532 Calcite Inorganic materials 0.000 claims abstract description 16
- 230000002000 scavenging effect Effects 0.000 claims description 22
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 14
- 238000000926 separation method Methods 0.000 abstract description 9
- 235000018553 tannin Nutrition 0.000 description 41
- 229920001864 tannin Polymers 0.000 description 41
- 239000001648 tannin Substances 0.000 description 41
- 239000003814 drug Substances 0.000 description 26
- 230000000052 comparative effect Effects 0.000 description 24
- 239000003795 chemical substances by application Substances 0.000 description 13
- 239000011575 calcium Substances 0.000 description 6
- 229910052791 calcium Inorganic materials 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 241000219433 Myrica Species 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 229910004261 CaF 2 Inorganic materials 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 235000008375 Decussocarpus nagi Nutrition 0.000 description 1
- 244000132436 Myrica rubra Species 0.000 description 1
- 235000014631 Myrica rubra Nutrition 0.000 description 1
- 229940124639 Selective inhibitor Drugs 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052923 celestite Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- UBXAKNTVXQMEAG-UHFFFAOYSA-L strontium sulfate Chemical compound [Sr+2].[O-]S([O-])(=O)=O UBXAKNTVXQMEAG-UHFFFAOYSA-L 0.000 description 1
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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
- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
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- Inorganic Chemistry (AREA)
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Abstract
The invention relates to the technical field of separation of oxidized mineral ore dressing, and discloses a beneficiation and recovery method of high-calcium fluorite ore, wherein the mass percent of calcite is more than or equal to 30%, and the mass percent of fluorite is less than or equal to 40%, and the beneficiation and recovery method comprises the following steps: s1, grinding the raw ore to 45-85 wt% of-0.074 mm minerals to obtain floating materials; s2, carrying out flotation on the floating material to obtain fluorite concentrate; the flotation inhibitor comprises, by weight, 0.5-2 parts of acidified water glass, 0.5-2 parts of fulvic acid and 1-3 parts of bayberry extract. The recovery method can effectively solve the problem that the gangue minerals, namely calcite and fluorite, in the high-calcium fluorite ore are difficult to separate, has simple process and good separation effect, and can ensure that fluorite concentrate meeting (YB/T5217-2005) FC-97A standard can be obtained.
Description
Technical Field
The invention belongs to the technical field of separation of oxidized mineral ore dressing, and particularly relates to a method for recovering high-calcium fluorite ore dressing.
Background
Fluorite is a non-metal mineral resource with strategic significance, and the application fields comprise traditional industries and emerging industries such as metallurgy, chemical industry, building materials, ceramics, aviation, refrigeration, medicine, atomic energy industry, fluorine chemical industry and the like. European, American and China all classify the mineral resources as important strategic mineral resources, and various protective measures are adopted for development and utilization of the mineral resources. Fluorite in nature is mainly produced in hydrothermal ore deposits and sedimentary ore deposits, geologists in China summarize the distribution characteristics, mineralization conditions and the like of the fluorite ores, and the fluorite ore deposits in China are divided into two categories, namely single ore deposits and co-associated fluorite ore deposits. The fluorite mineral resources in China are characterized in that: the reserves are abundant, the resource potential is huge; secondly, the distribution is relatively centralized and mainly centralized in eight provinces and areas such as inner Mongolia, Zhejiang, Fujian, Jiangxi, Hunan, Guangdong, Guangxi and Yunnan; the single fluorite deposit (point) is more, and the reserve volume is less; the number of the associated ore deposits (points) is small, and the storage capacity is large; rich and lean ores are more; fifthly, the difficult dressing is more, and the easy dressing is less. At present, the development and utilization of fluorite resources in China are mainly single fluorite resources.
In recent years, with the increasing demand of new energy, new materials, fluorine chemical industry and other industries on fluorite, the consumption of single fluorite resources in China is transitional, and the single fluorite resources are in short supply. The common and associated fluorite resources in China are abundant in reserves and have great development and utilization potentials. However, the content of fluorite in the ore is low, the properties of the ore are complex, and the main gangue minerals contain calcite (CaCO) besides quartz 3 ) Celestite (SrSO) 4 ) Barite (BaSO) 4 ) And the like. And calcite (CaCO) 3 ) With fluorite (CaF) 2 ) Closely coexisting, having properties similar to those of the above, having high separation difficulty, and the higher the calcite content is, the more difficult it is to obtain a qualified fluorite product.
Disclosure of Invention
The invention aims to provide a beneficiation and recovery method for high-calcium fluorite ore, aiming at the problem that the traditional method is difficult to separate and utilize calcite and fluorite in the high-calcium fluorite ore with the calcite content of more than 30 percent and the fluorite mass percent of less than or equal to 40 percent, so that the resource utilization rate is low, and at least the effects of simple process and obvious separation effect are achieved.
The purpose of the invention is realized by the following technical scheme:
a high-calcium fluorite beneficiation and recovery method comprises the following steps:
s1, grinding the raw ore to 45-85 wt% of-0.074 mm minerals to obtain floating materials;
s2, carrying out flotation on the floating material to obtain fluorite concentrate; wherein the flotation inhibitor comprises 0.5-2 parts by weight of acidified water glass, 0.5-2 parts by weight of fulvic acid and 1-3 parts by weight of bayberry tannin extract; preferably, the inhibitor for flotation comprises 1 part of acidified water glass, 1 part of fulvic acid and 2 parts of myrica extract by weight.
Further, in step S2, the pH of the flotation is 6 to 7.5, preferably 6.5. The flotation effect of the recovery method on fluorite can be guaranteed by limiting the pH of the ore pulp to be 6.0-7.5, wherein the flotation effect is the best when the pH of the ore pulp is 6.5.
Further, in step S2, the number of rough concentration in the flotation is 1 to 3, the number of scavenging is 2 to 3, and the number of fine concentration is 7 to 9.
Further, each fluorite concentration also obtains respective concentrated middlings, and the respective concentrated middlings are sequentially returned to the previous stage of operation.
Furthermore, the dosage of the inhibitor is 500-1500 g/t.
Further, in step S2, the collector for flotation includes sodium oleate, and the usage amount of the collector is 1200-2400 g/t.
Furthermore, in step S2, the dosage of the inhibitor in the roughing is 200 to 1000 g/t.raw ore, and the dosage of the collector is 1000 to 2000 g/t.raw ore;
and/or the dosage of the inhibitor in scavenging is 25-150 g/t of raw ore, and the dosage of the collector is 200-400 g/t of raw ore;
and/or the dosage of the inhibitor during concentration is 0-200 g/t of raw ore;
preferably, when the selection times are 7-9 times, the dosage of the inhibitor is as follows:
in the 1 st time, the dosage of the inhibitor is 100-200 g/t per raw ore;
in the 2 nd time, the dosage of the inhibitor is 100-200 g/t per raw ore;
in the 3 rd time, the dosage of the inhibitor is 75-150 g/t per raw ore;
in the 4 th time, the dosage of the acidified water glass is 75-150 g/t of raw ore respectively;
in the 5 th time, the dosage of the acidified water glass is 50-100 g/t of raw ore respectively;
in the 6 th time, the dosage of the acidified water glass is 50-100 g/t of raw ore respectively;
in the 7 th time, the use amount of the acidified water glass is 25-50 g/t of raw ore respectively;
in the 8 th time, the dosage of the acidified water glass is 25-50 g/t of raw ore respectively;
and in the 9 th time, the dosage of the acidified water glass is 25-50 g/t of raw ore respectively.
Further, in step S2, the flotation equipment includes a mechanical stirring flotation machine.
In the technical scheme, the acidified water glass, the fulvic acid and the bayberry tannin extract are adopted to adjust the surface property difference between the fluorite ore and the gangue ore, and then the sodium oleate is used as a collecting agent for flotation. The mixture of the acidified water glass, the fulvic acid and the bayberry tannin extract is used as an inhibitor, gangue minerals (calcite and quartz) can be inhibited in an auxiliary mode, a good flotation effect is achieved under the condition of small medicament dosage and a simple flotation process, and therefore the grade and the recovery rate of the obtained fluorite concentrate are improved remarkably.
It will be appreciated that the proportions of acidified waterglass, fulvic acid and myrica extract will depend on the gangue mineral content; when the raw ore properties such as the type and content of gangue minerals, the particle size distribution of particles and other factors are changed obviously, the proportion of the three can be adjusted correspondingly to adapt to the change.
Further, in step S1, grinding the raw ore to-0.074 mm minerals in a weight percentage of 45-85% specifically includes the following steps:
1) crushing raw ores to obtain a selected material;
2) grading the selected materials to obtain coarse fraction ores and fine fraction ores;
3) sorting coarse fraction ores by using a cyclone to obtain pre-sorted concentrate;
4) and combining the pre-sorted concentrate and the fine-fraction ore for grinding to prepare the floating material.
In the technical scheme, the fluorite concentrate (CaF) meeting (YB/T5217-2005) FC-97A standard can be successfully obtained from the high-calcium fluorite ore with the calcite content of more than 30 percent and the fluorite mass percent of less than or equal to 40 percent only by crushing, grading, heavy medium cyclone pre-sorting, ore grinding and flotation 2 More than or equal to 97 percent). The method has simple process and obvious sorting and recycling effects. The fluorite is pre-enriched by adopting the heavy medium cyclone, more than 70% of calcite minerals can be removed in advance, and the effects of improving separation and reducing the beneficiation cost are achieved; adopt the effectual selective inhibitor who realizes calcite and other gangue minerals of flotation separation improves super fluorite and calcite and gangue mineral's sorting nature, strengthens the recovery effect of fluorite, obtains high-quality fluorite product.
Further, in the step 1), the crushing frequency is preferably more than 2 times, and the granularity of the selected material is-10-20 mm.
Further, in the step 2), the granularity of the coarse fraction ore is 1-10-20 mm, preferably + 1-20 mm; the particle size range of the fine fraction ore is 0-1-3 mm, and the preferred particle size range is-1-3 mm.
Further, in the step 3), the cyclone is a dense medium cycloneThe heavy medium cyclone has the selected ore feeding pressure of 0.1-0.3MPa and the medium density of 2-3g/cm 3 。
Further, in the step 4), the ore grinding equipment is a ball mill, the ore grinding concentration is 50-65%, and the ore grinding fineness is 45-85% of-0.074 mm.
Further, in step S1, the raw ore is high-calcium fluorite ore having a calcite content of 30% or more and a fluorite mass percentage of 40% or less.
The beneficial effects of the invention are:
the beneficiation and recovery method of the high-calcium fluorite ore is simple in process method, and the grade and the recovery rate of fluorite concentrate are remarkably improved by using the mixture of acidified water glass, fulvic acid and bayberry tannin extract as an inhibitor; through the processes of crushing, grading, heavy medium cyclone pre-separation, ore grinding and flotation, the problems that in the high-calcium fluorite ore, calcite is difficult to separate from fluorite, fluorite is difficult to recover, and gangue minerals are difficult to separate and the like can be effectively solved. The method has an obvious separation effect on the high-calcium fluorite ore, and can obtain a better recovery effect under the conditions that the content of calcite is more than 30% and the mass percent of fluorite is less than or equal to 40% compared with the traditional recovery method, so that the high-calcium fluorite ore can be better recovered.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
Example 1
The raw material to be selected is a high-calcium fluorite sample, CaF, of a certain company in Guizhou 2 29.20% of CaCO 3 The content is 33.02 percent, and the granularity is-70 mm. The method specifically comprises the following steps (as shown in figure 1):
s1, crushing a raw material to be selected, wherein the final crushing granularity is-10 mm, and preparing a selected material;
wherein, the crushing adopts two-section crushing, a jaw crusher is adopted, the width of a first-section crushing ore discharge port is 30mm, and the width of a second-section crushing ore discharge port is 10 mm;
s2, classifying the crushed ore with the particle size of-10 mm to obtain coarse-fraction ore and fine-fraction ore;
wherein the granularity range of the fine fraction mineral is 0-1mm, and the granularity range of the coarse fraction mineral is 1-10 mm.
S3, carrying out pre-tailing discarding and sorting on the ores with the size fraction of 1-10mm by adopting a heavy medium cyclone to obtain pre-selected concentrate and high-calcium tailings, discharging the high-calcium tailings, and carrying out next operation on the pre-selected concentrate;
wherein the dense medium density of the dense medium cyclone is 2.20, and the feeding pressure is 0.15 MPa;
s4, grinding the pre-selected concentrate and the ore with the size fraction of 0-1mm by using a ball mill, wherein the grinding granularity is 45% of-0.074 mm, and obtaining a floating material;
wherein, the ore grinding adopts two-section open-circuit ore grinding, the first-section ore grinding adopts a phi 2m ball mill, and the second-section ore grinding adopts a phi 1m ball mill.
S5, performing flotation operation on the pulp of the floating material by adopting a 24L mechanical flotation machine, performing primary roughing, primary scavenging and seven times of fine selection to obtain fluorite concentrate;
wherein, the froth of the scavenging I is returned to the roughing, and the tailings of the scavenging I are discharged as flotation tailings; each time of concentration also obtains respective concentrated middlings, and the respective concentrated middlings are sequentially returned to the previous stage of operation;
the rough selection system comprises: the dosage of the mixed inhibitor of the roughly selected acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 200g/t of raw ore, 200g/t of raw ore and 400g/t of raw ore, and the dosage of the collecting agent sodium oleate is 1500g/t of raw ore;
a scavenging I medicament system: the dosage of the mixed inhibitor of the roughly selected acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 50g/t of raw ore, 50g/t of raw ore and 100g/t of raw ore, and the dosage of the sodium oleate is 200g/t of raw ore;
refined I medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 100g/t of raw ore, 100g/t of raw ore and 200g/t of raw ore;
and (2) a refined II medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 100g/t of raw ore, 100g/t of raw ore and 200g/t of raw ore;
refined III medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 50g/t of raw ore, 50g/t of raw ore and 100g/t of raw ore;
a refined IV medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 50g/t of raw ore, 50g/t of raw ore and 100g/t of raw ore;
a refined V medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 25g/t of raw ore, 25g/t of raw ore and 50g/t of raw ore;
selecting a VI medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 25g/t of raw ore, 25g/t of raw ore and 50g/t of raw ore;
the selected VII acidified water glass, fulvic acid and the myrica tannin extract mixed inhibitor respectively have the dosage of 25g/t raw ore, 25g/t raw ore and 50g/t raw ore.
Wherein the weight ratio of the acidified water glass, the fulvic acid and the bayberry tannin extract in the inhibitor is 1:1: 2.
Example 2
The raw material to be selected is a high-calcium fluorite sample, CaF 2 The content of CaCO is 32.83 percent 3 The content is 33.27 percent, and the granularity is-70 mm. The method specifically comprises the following steps (as shown in figure 1):
s1, crushing a raw material to be selected, wherein the final crushing granularity is-15 mm, and preparing a selected material;
wherein, the crushing adopts two-section crushing, a jaw crusher is adopted, the width of a first-section crushing ore discharge port is 30mm, and the width of a second-section crushing ore discharge port is 15 mm;
s2, classifying the crushed ore with the particle size of-15 mm to obtain coarse-fraction ore and fine-fraction ore;
wherein the granularity range of the fine fraction mineral is 0-2mm, and the granularity range of the coarse fraction mineral is 2-15 mm.
S3, carrying out pre-tailing discarding and sorting on the ores with the size fraction of 2-15mm by adopting a heavy medium cyclone to obtain pre-selected concentrate and high-calcium tailings, discharging the high-calcium tailings, and carrying out next operation on the pre-selected concentrate;
wherein the dense medium density of the dense medium cyclone is 2.30, and the feeding pressure is 0.2 MPa;
s4, grinding the pre-selected concentrate and the ore with the size fraction of 0-2mm by using a ball mill, wherein the grinding granularity is 55 percent of-0.074 mm, and obtaining a floating material;
wherein, the ore grinding adopts two-section open-circuit ore grinding, the first-section ore grinding adopts a phi 2m ball mill, and the second-section ore grinding adopts a phi 1m ball mill.
S5, performing flotation operation on the pulp of the floating material by adopting a 24L mechanical flotation machine, and performing rough concentration twice, scavenging twice and fine concentration eight times to obtain fluorite concentrate;
wherein, the froth of the scavenging II returns to the scavenging I, the froth of the scavenging I returns to the roughing II, the froth of the roughing II returns to the roughing I, and the tailings of the scavenging II are discharged as flotation tailings; each time of concentration also obtains respective concentrated middlings, and the respective concentrated middlings are sequentially returned to the previous stage of operation;
the rough selection system comprises: the dosage of the crude selection I of the acidified water glass, the fulvic acid and the bayberry tannin extract mixed inhibitor is respectively 200g/t of raw ore, 200g/t of raw ore and 400g/t of raw ore, and the dosage of the collecting agent sodium oleate is 1000g/t of raw ore; the dosage of the mixed inhibitor of the rough concentration II acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 50g/t of raw ore, 50g/t of raw ore and 100g/t of raw ore, and the dosage of the collecting agent sodium oleate is 250g/t of raw ore;
a scavenging I medicament system: the dosage of the mixed inhibitor of the roughly selected acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 25g/t of raw ore, 25g/t of raw ore and 50g/t of raw ore, and the dosage of the collecting agent sodium oleate is 100g/t of raw ore; and (3) selecting II: the dosage of the mixed inhibitor of the roughly selected acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 25g/t of raw ore, 25g/t of raw ore and 50g/t of raw ore, and the dosage of the collecting agent sodium oleate is 50g/t of raw ore;
refined I medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 150g/t of raw ore, 150g/t of raw ore and 300g/t of raw ore;
refined II medicament system: the dosage of the acidified water glass, the fulvic acid and the bayberry tannin extract mixed inhibitor is 150g/t of raw ore, 150g/t of raw ore and 300g/t of raw ore respectively;
refined III medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 100g/t of raw ore, 100g/t of raw ore and 200g/t of raw ore;
a refined IV medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 100g/t of raw ore, 100g/t of raw ore and 200g/t of raw ore;
a refined V medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 50g/t of raw ore, 50g/t of raw ore and 100g/t of raw ore;
fine VI medicament system: the dosage of the acidified water glass, the fulvic acid and the bayberry tannin extract mixed inhibitor is respectively 50g/t of raw ore, 50g/t of raw ore and 100g/t of raw ore;
refined VII dose system: the dosage of the acidified water glass, the fulvic acid and the bayberry tannin extract mixed inhibitor is respectively 25g/t of raw ore, 25g/t of raw ore and 50g/t of raw ore;
selecting a VIII medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 25g/t of raw ore, 25g/t of raw ore and 50g/t of raw ore;
wherein the weight ratio of the acidified water glass, the fulvic acid and the bayberry tannin extract in the inhibitor is 1:1: 2.
Example 3
The raw material to be selected is a high-calcium fluorite sample, CaF 2 30.80% of CaCO 3 The content is 30.51 percent, and the granularity is-80 mm. The method specifically comprises the following steps (as shown in figure 1):
s1, crushing a raw material to be selected, wherein the final crushing granularity is-20 mm, and preparing a selected material;
wherein, the crushing adopts two-section crushing, a jaw crusher is adopted, the width of a first-section crushing ore discharge port is 50mm, and the width of a second-section crushing ore discharge port is 20 mm;
s2, classifying the crushed ore with the particle size of-20 mm to obtain coarse-fraction ore and fine-fraction ore;
wherein the granularity range of the fine fraction mineral is 0-3mm, and the granularity range of the coarse fraction mineral is 3-20 mm.
S3, carrying out pre-tailing discarding and sorting on the ore with the size fraction of 3-20mm by adopting a heavy medium cyclone to obtain pre-selected concentrate and high-calcium tailings, discharging the high-calcium tailings, and carrying out next operation on the pre-selected concentrate;
wherein the dense medium density of the dense medium cyclone is 2.25, and the feeding pressure is 0.25 MPa;
s4, grinding the pre-selected concentrate and the ore with the size fraction of 0-3mm by using a ball mill, wherein the grinding granularity is-0.074 mm and the content is 65%, and obtaining a floating material;
wherein, two-section open-circuit ore grinding is adopted for ore grinding, a phi 2m ball mill is adopted for ore grinding in the first section, and a phi 1m ball mill is adopted for the ore grinding in the second section.
S5, performing flotation operation on the pulp of the floating material by adopting a 24L mechanical flotation machine, and performing two times of rough concentration, three times of scavenging and eight times of fine concentration to obtain fluorite concentrate;
wherein, the foam of the scavenging III returns to the scavenging II, the foam of the scavenging II returns to the scavenging I, the foam of the scavenging I returns to the roughing II, the foam of the roughing II returns to the roughing I, and the tailing of the scavenging II is discharged as the flotation tailing; each time of concentration also obtains respective concentrated middlings, and the respective concentrated middlings are sequentially returned to the previous stage of operation;
the rough selection system comprises: the dosage of the crude selection I of the acidified water glass, the fulvic acid and the bayberry tannin extract mixed inhibitor is respectively 300g/t of raw ore, 300g/t of raw ore and 600g/t of raw ore, and the dosage of the collecting agent sodium oleate is 1500g/t of raw ore; the dosage of the mixed inhibitor of the rough concentration II acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 50g/t of raw ore, 50g/t of raw ore and 100g/t of raw ore, and the dosage of the collecting agent sodium oleate is 250g/t of raw ore;
a scavenging I medicament system: the dosage of the mixed inhibitor of roughly selecting acidified water glass, fulvic acid and bayberry tannin extract is respectively 50g/t of raw ore, 50g/t of raw ore and 100g/t of raw ore, and the dosage of the collecting agent sodium oleate is 75g/t of raw ore; and (3) selecting II: the dosage of the mixed inhibitor of the roughly selected acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 25g/t of raw ore, 25g/t of raw ore and 50g/t of raw ore, and the dosage of the collecting agent sodium oleate is 50g/t of raw ore; and (3) scavenging III medicament system: the dosage of the mixed inhibitor of the roughly selected acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 25g/t of raw ore, 25g/t of raw ore and 50g/t of raw ore, and the dosage of the collecting agent sodium oleate is 50g/t of raw ore;
refined I medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 200g/t of raw ore, 200g/t of raw ore and 400g/t of raw ore;
refined II medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 150g/t of raw ore, 150g/t of raw ore and 300g/t of raw ore;
refined III medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 100g/t of raw ore, 100g/t of raw ore and 200g/t of raw ore;
a refined IV medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 100g/t of raw ore, 100g/t of raw ore and 200g/t of raw ore;
a refined V medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 50g/t of raw ore, 50g/t of raw ore and 100g/t of raw ore;
fine VI medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 50g/t of raw ore, 50g/t of raw ore and 100g/t of raw ore;
refined VII dose system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 25g/t of raw ore, 25g/t of raw ore and 50g/t of raw ore;
selecting a VIII medicament system: the dosage of the mixed inhibitor of the acidified water glass, the fulvic acid and the bayberry tannin extract is respectively 25g/t of raw ore, 25g/t of raw ore and 50g/t of raw ore.
Wherein the weight ratio of the acidified water glass, the fulvic acid and the bayberry tannin extract in the inhibitor is 1:1: 2.
Comparative example 1
Comparative example 1 and example 1 used the same raw ore, comparative example 1 did not perform steps S2 and S3, and the remaining steps, selection of the agent, and the like were the same as in example 1 (for comparative explanation of the effect of using a dense medium cyclone).
Comparative example 2
Comparative example 2 and example 2 used the same raw ore, comparative example 2 did not perform steps S2, S3, and the remaining steps, selection of the agent, and the like were the same as example 2 (for comparative explanation of the effect of using a dense medium cyclone).
Comparative example 3
Comparative example 3 and example 1 used the same raw ore, process steps, except that the inhibitor used in comparative example 3 was different and the inhibitor used in comparative example 3 was a commercially available inhibitor (used for comparison to illustrate the effect of the inhibitor of the present invention), wherein the commercially available inhibitor was valonea extract in the same amount as in example 1.
Comparative example 4
Comparative example 4 and example 1 the same raw ore, process steps were used except that the inhibitor used in comparative example 4 was different, the inhibitor used in comparative example 4 was acidified waterglass and fulvic acid at a ratio of 1:1, no extract of myrica rubra was used (to demonstrate the synergistic effect of the inhibitor components of the present invention) and the amount of inhibitor used was the same as in example 1.
Comparative example 5
Comparative example 5 and example 2 the same raw ore, process steps were used, except that the inhibitor used in comparative example 5 was different, the inhibitor used in comparative example 5 was acidified waterglass and a bayberry extract in a ratio of 1:2, no fulvic acid was used (to demonstrate the synergistic effect of the inhibitor components of the invention), and the amount of inhibitor used was the same as in example 2.
Comparative example 6
Comparative example 6 and example 2 used the same raw ore, process steps, except that the inhibitors used in comparative example 6 were different, that the inhibitors used in comparative example 6 were fulvic acid and myrica extract in a ratio of 1:2, that no acidified waterglass was used (to demonstrate the synergistic effect of the inhibitor components of the invention), and that the amounts of inhibitors were the same as in example 2.
The results are shown in the following table:
the foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The high-calcium fluorite beneficiation and recovery method is characterized by comprising the following steps of:
s1, grinding the raw ore to 45-85 wt% of-0.074 mm minerals to obtain floating materials;
s2, carrying out flotation on the floating material to obtain fluorite concentrate; the flotation inhibitor comprises, by weight, 0.5-2 parts of acidified water glass, 0.5-2 parts of fulvic acid and 1-3 parts of bayberry extract.
2. The beneficiation and recovery method for high-calcium fluorite according to claim 1, wherein in the step S2, the pH value of the flotation is 6-7.5.
3. The beneficiation and recovery method for high-calcium fluorite according to claim 1, wherein in the step S2, the roughing times in the flotation are 1-3 times, the scavenging times are 2-3 times, and the concentrating times are 7-9 times.
4. The beneficiation and recovery method for high-calcium fluorite according to claim 1, wherein in the step S2, the amount of the inhibitor is 500-1500 g/t-raw ore.
5. The high-calcium fluorite beneficiation and recovery method according to claim 1, wherein in the step S2, the flotation collector comprises sodium oleate, and the amount of the collector is 1200-2400 g/t-raw ore.
6. The beneficiation recovery method for high-calcium fluorite according to any one of claims 1 to 5, wherein in the step S1, the step of grinding the raw ore to 45 to 85 weight percent of-0.074 mm minerals specifically comprises the following steps:
1) crushing raw ores to obtain a selected material;
2) grading the selected materials to obtain coarse fraction ores and fine fraction ores;
3) sorting coarse fraction ores by using a cyclone to obtain pre-sorted concentrate;
4) and combining the pre-sorted concentrate and the fine-fraction ore for grinding to prepare the floating material.
7. The high-calcium fluorite beneficiation and recovery method according to claim 6, wherein in the step 1), the grain size of the selected material is-10-20 mm.
8. The beneficiation and recovery method for high-calcium fluorite according to claim 6, wherein in the step 2), the particle size of the coarse fraction ore is in the range of 1-10-20 mm; the particle size range of the fine fraction ore is 0-1-3 mm.
9. The high-calcium fluorite beneficiation and recovery method according to claim 6, wherein in the step 3), the cyclone is a heavy medium cyclone, the ore feeding pressure selected by the heavy medium cyclone is 0.1-0.3MPa, and the medium density is 2-3g/cm 3 。
10. The beneficiation and recovery method for high-calcium fluorite according to any one of claims 1 to 5, wherein in step S1, the raw ore is high-calcium fluorite ore with a calcite content of more than 30% and a fluorite mass percentage of less than or equal to 40%.
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