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CN-119387045-B - Beneficiation method for high calcite type fluorite ore

CN119387045BCN 119387045 BCN119387045 BCN 119387045BCN-119387045-B

Abstract

The application provides a beneficiation method for a high-calcite type fluorite ore, which belongs to the field of ore flotation, and solves the current situation that the recovery rate and grade of fluorite are in a lower range because calcite and fluorite are difficult to separate due to similar properties in the flotation process by adding a special high-selectivity fluorite collecting agent CK-1 and a calcite inhibitor CD-8 into the high-calcite type fluorite ore and matching with soda ash, an acidified water glass medicament and a roughing-scavenging-concentrating process flow. The adopted special collector CK-1 is chemically adsorbed on the surface of Ca ions, the adsorption quantity of the collector on the surface of calcite can be remarkably reduced, the adopted inhibitor CD-8 is chemically adsorbed on the surface of calcite, a hydrophilic film is formed on the surface of calcite, and the adsorption of the hydrophobic collector is blocked, so that the inhibition of calcite is realized, and the selective inhibition capability of the high-calcite type fluorite ore is enhanced by utilizing the synergistic effect of the combined medicaments.

Inventors

  • XIAO SHUNYUAN
  • LI JIE
  • Song Shuixiang
  • FENG CHENG
  • HE ZHAN
  • SUN DAYONG
  • WANG LONG
  • HAN YUANYAN

Assignees

  • 长沙矿山研究院有限责任公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (9)

  1. 1. The beneficiation method for the high calcite type fluorite ore is characterized by comprising the following steps of: S1, crushing target raw ore, and preparing ore pulp from the crushed target raw ore; s2, carrying out rough concentration, scavenging and concentration operation on the ore pulp to finally obtain fluorite concentrate; the agents added during roughing comprise alkali, acidified water glass, inhibitor CD-8 and collector CK-1; the agent added during scavenging comprises acidified water glass and a collector CK-1; The agent added during concentration comprises one or more of inhibitor CD-8 and acidified water glass; The collector CK-1 comprises two or more than two of alpha linolenic acid, arachidonic acid and docosapentaenoic acid; the inhibitor CD-8 comprises hydroxypropyl starch, propylene glycol alginate and locust bean gum; The mass ratio of alpha linolenic acid to arachidonic acid in the collector CK-1 is 15-30:20-40, or The mass ratio of alpha linolenic acid to docosapentaenoic acid in the collector CK-1 is 15-30:30-55, or The mass ratio of the arachidonic acid to the docosapentaenoic acid in the collector CK-1 is 20-40:30-55, or The mass ratio of alpha linolenic acid, arachidonic acid and docosapentaenoic acid in the collector CK-1 is 15-30:20-40:30-55; the mass ratio of the hydroxypropyl starch, the propylene glycol alginate and the locust bean in the inhibitor CD-8 is 20-40:20-40.
  2. 2. The method for beneficiation of high calcite type fluorite ore according to claim 1, wherein the pH value of the acidified water glass ranges from 1 to 2.
  3. 3. The beneficiation method for the high calcite type fluorite ore, according to claim 2, is characterized in that the alkali comprises sodium carbonate, the dosage of the sodium carbonate is 800-1200 g/t, the dosage of the acidified water glass is 800-1200 g/t, the dosage of the inhibitor CD-8 is 300-700 g/t, and the dosage of the collector CK-1 is 300-700 g/t during roughing.
  4. 4. The beneficiation method for the high calcite type fluorite ore is characterized in that the scavenging comprises scavenging I and scavenging II, the amount of the acidified water glass is 300-700 g/t, the amount of the collector CK-1 is 30-70 g/t when the scavenging I is carried out, the amount of the acidified water glass is 200-300 g/t, and the amount of the collector CK-1 is 20-30 g/t when the scavenging II is carried out.
  5. 5. The beneficiation method of the high calcite fluorite ore, according to claim 2, is characterized in that beneficiation comprises beneficiation I, beneficiation II, beneficiation III, beneficiation IV, beneficiation V, beneficiation VI and beneficiation VII, wherein agents added during beneficiation I comprise inhibitors CD-8 and acidified water glass, the dosage of the inhibitors CD-8 during beneficiation I is 200-300 g/t, the dosage of the acidified water glass is 700-900 g/t, the agents added during beneficiation II, beneficiation III, beneficiation IV, beneficiation V and beneficiation VI comprise acidified water glass, and the dosage of the acidified water glass added during beneficiation II, beneficiation III, beneficiation IV, beneficiation V and beneficiation VI is 600-700 g/t, 450-550 g/t, 300-400 g/t, 100-200 g/t and 60-100 g/t respectively.
  6. 6. The method for beneficiating a high calcite type fluorite ore according to claim 5, further comprising concentrating, recleaning and fine scavenging middlings I and II obtained by concentrating I and II.
  7. 7. The beneficiation method for the high calcite type fluorite ore, according to claim 6, is characterized in that the reagent added during the recleaning of the middling I comprises acidified water glass and a collector CK-1, the dosage of the acidified water glass during the recleaning of the middling I is 200-700 g/t, the dosage of the collector CK-1 is 10-30 g/t, the reagent added during the fine scavenging of the middling I comprises acidified water glass and the collector CK-1, the dosage of the acidified water glass during the fine scavenging of the middling I is 300-400 g/t, and the dosage of the collector CK-1 is 5-10 g/t.
  8. 8. The beneficiation method for the high calcite type fluorite ore, according to claim 6, is characterized in that the reagent added during the recleaning of the middling II comprises acidified water glass and a collector CK-1, the dosage of the acidified water glass during the recleaning of the middling II is 300-400 g/t, the dosage of the collector CK-1 is 10-30 g/t, the reagent added during the fine scavenging of the middling II comprises acidified water glass and the collector CK-1, the dosage of the acidified water glass during the fine scavenging of the middling II is 100-200 g/t, and the dosage of the collector CK-1 is 5-10 g/t.
  9. 9. The beneficiation method for the high calcite type fluorite ore, according to claim 6, is characterized in that the concentration of middling I is 18-22%, the concentration of middling II is 18-22%, and the concentration of the prepared ore pulp in step S1 is 30-35%.

Description

Beneficiation method for high calcite type fluorite ore Technical Field The invention relates to the technical field of ore floatation, in particular to a beneficiation method for high calcite type fluorite ore. Background Fluorite is a nonmetallic 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, fluoride industry and the like. In recent years, the demand for fluorite is increasing with the industries of new energy, new materials, fluorine chemical industry and the like. The common and associated fluorite resources in China are rich in reserves, and the development and utilization potential is huge. However, the fluorite content in the ore is low, the ore property is complex, and the main gangue minerals contain calcite (CaCO 3), celestite (SrSO 4), barite (BaSO 4) and the like besides quartz. However, calcite (CaCO 3) and fluorite (CaF 2) are closely symbiotic, and have similar properties, so that the separation difficulty is high, and the higher the calcite content is, the more difficult to obtain a high-grade fluorite product. The calcite inhibitor commonly adopted in the prior art has a certain inhibition effect on calcite, such as acidified water glass, tannin extract, maltodextrin, carboxymethyl cellulose and the like, but is difficult to realize effective separation of fluorite and calcite. The patent with publication number CN103706485B provides a beneficiation method of high calcium carbonate type fluorite ore, which takes tannic acid as an inhibitor, but the agent is high in price and difficult to apply industrially, hydrofluoric acid is used for acid leaching, the process is dangerous, and the operation is difficult in actual production. In view of the above, there is a need to design a beneficiation method for high calcite type fluorite ore to solve the above problems. Disclosure of Invention In view of the technical problems in the background art, the application provides a beneficiation method for high-calcite type fluorite ores, and aims to solve the technical problem that carbonate minerals and fluorite ore resources are not easy to separate in the existing low-grade fluorite ores containing high-grade carbonate minerals. The embodiment of the application provides a beneficiation method for high calcite type fluorite ores, which comprises the following steps of: S1, crushing target raw ore, and preparing ore pulp from the crushed target raw ore; s2, carrying out rough concentration, scavenging and concentration operation on the ore pulp to finally obtain fluorite concentrate; The reagents added during the roughing operation comprise alkali, acidified water glass, inhibitor CD-8 and collector CK-1; the agent added during scavenging comprises acidified water glass and a collector CK-1; The agent added during concentration comprises one or more of inhibitor CD-8 and acidified water glass; The collector CK-1 comprises two or more than two of alpha linolenic acid, arachidonic acid and docosapentaenoic acid; the inhibitor CD-8 comprises two or more of hydroxypropyl starch, propylene glycol alginate and locust bean gum. In the technical scheme of the embodiment of the application, the special high-selectivity fluorite collector CK-1 and the calcite inhibitor CD-8 are added into the high-calcite type fluorite ore, and the processes of soda ash, acidified water glass medicament and rough concentration, scavenging and fine concentration are matched, so that the current situation that the recovery rate and grade of fluorite are in a lower range because calcite and fluorite have similar properties in the flotation process and are difficult to separate is solved. The specific collector CK-1 can be adsorbed on the surface of Ca ions in a chemical mode, and compared with the traditional collector, the collector can obviously reduce the adsorption quantity on the surface of calcite, so that the floatability difference between fluorite and calcite is enhanced, and the medicament cost is reduced. The adopted inhibitor CD-8 is adsorbed on the surface of calcite in a chemical mode, and forms a hydrophilic film on the surface of calcite, so that the adsorption of a hydrophobic collector can be blocked, the inhibition of calcite is realized, and the selective inhibition capability of the high calcite type fluorite ore is enhanced. In some embodiments, the mass ratio of alpha linolenic acid to arachidonic acid in the collector CK-1 is 15-30:20-40, or The mass ratio of alpha linolenic acid to docosapentaenoic acid in the collector CK-1 is 15-30:30-55, or The mass ratio of the arachidonic acid to the docosapentaenoic acid in the collector CK-1 is 20-40:30-55, or The mass ratio of alpha linolenic acid, arachidonic acid and docosapentaenoic acid in the collector CK-1 is 15-30:20-40:30-55, and/or The mass ratio of