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CN-121988461-A - Combined inhibitor and application thereof

CN121988461ACN 121988461 ACN121988461 ACN 121988461ACN-121988461-A

Abstract

The invention discloses a combined inhibitor and application thereof, wherein the combined inhibitor comprises, by weight, 40% -70% of sodium metabisulfite, 20% -40% of sodium thiosulfate, 1% -15% of tannin extract and 1% -10% of humate. The application of the combined inhibitor in lead zinc ore dressing. Compared with the conventional lime-free inhibitor, the combined inhibitor has the advantages of strong adaptability, good inhibition effect, environmental friendliness and the like, can replace lime and can be widely used for lead-zinc ore dressing, not only can obtain higher grade and recovery rate of lead and zinc concentrate, but also can remarkably improve the recovery rate of silver in the lead concentrate, and simultaneously can remarkably reduce the zinc and sulfur content in the lead concentrate, thereby being capable of avoiding the problems of pipeline scaling and low recovery rate of associated gold and silver caused by the large-scale use of lime, having high use value and good application prospect.

Inventors

  • SONG KUN
  • LIN QINGQUAN
  • TONG JIACHENG
  • CHEN JIANXIN
  • MEI HUI
  • YUAN MAN
  • Chen Naikai

Assignees

  • 江西铜业技术研究院有限公司

Dates

Publication Date
20260508
Application Date
20251030

Claims (10)

  1. 1. The combined inhibitor is characterized by comprising the following raw material components in percentage by weight: 40% -70% of sodium metabisulfite, 20% -40% Of sodium thiosulfate, 1% -15% Of tannin extract, 1% -10% Of humate.
  2. 2. The combination inhibitor according to claim 1, wherein the tannin extract is at least one of valonea extract, bayberry extract, larch tannin extract, and the humate is sodium humate or potassium humate.
  3. 3. Use of a combination inhibitor according to claim 1 or 2 in lead zinc ore beneficiation.
  4. 4. The method according to claim 3, wherein the combined inhibitor is used for lead zinc ore dressing in the form of a combined inhibitor solution, the combined inhibitor solution is prepared by dissolving the combined inhibitor into water, and the combined inhibitor solution has a mass concentration of 10%.
  5. 5. The application according to claim 4, characterized in that it comprises the following steps: s1, grinding and grading lead-zinc ores to obtain raw ore pulp; s2, adding zinc sulfate and a combined inhibitor into raw ore pulp, pulping, and adding a lead collector for roughing to obtain lead roughing concentrate and lead roughing tailings; S3, adding zinc sulfate and a combined inhibitor into the lead roughing concentrate for concentration to obtain lead concentrate; S4, adding an activating agent and a combined inhibitor into the lead tailings, pulping, and adding a zinc collector for roughing to obtain zinc roughing concentrate and zinc roughing tailings; s5, adding a combined inhibitor into the zinc roughing concentrate for concentrating to obtain zinc concentrate, and adding a zinc collector into the zinc roughing tailings for scavenging to obtain zinc tailings.
  6. 6. The use according to claim 5, wherein in step S1, the fineness of the raw ore pulp is-0.074 mm accounting for 60% -80%, and the mass concentration of the raw ore pulp is 30% -45%.
  7. 7. The application of the method according to claim 6, wherein in the step S2, the addition amount of zinc sulfate is 200 g/t-600 g/t, the addition amount of the combined inhibitor is 200 g/t-600 g/t, the addition amount of the lead collector is 50 g/t-150 g/t, the lead collector is added into raw ore pulp in the form of a lead collector solution, the mass concentration of the lead collector in the lead collector solution is 5%, the lead collector solution is prepared by dissolving the lead collector in water, the lead collector is at least one of alkyl dithiophosphate, butylammonium black drug, 25# black drug and ethionazide, and the size mixing time is 3 min-10 min.
  8. 8. The application of the method according to claim 7, wherein in the step S3, the addition amount of the zinc sulfate is 50-300 g/t, the addition amount of the combined inhibitor is 50-300 g/t, the lead concentration tailings generated in the concentration process are used as middlings and returned to the rough concentration stage, the addition amount of the lead collector is 5-20 g/t, the lead collector is added to the lead rough concentration tailings in the form of a lead collector solution, the mass concentration of the lead collector in the lead collector solution is 5%, the lead collector solution is prepared by dissolving the lead collector in water, the lead collector is at least one of alkyl dithiophosphate, butylammonium black, 25# black and ethion nitrogen, and the lead scavenger tailings generated in the scavenging process are returned to the concentration stage.
  9. 9. The application of any one of claims 5-8, wherein in step S4, the addition amount of the activator is 100 g/t-400 g/t, the activator is copper sulfate, the addition amount of the combined inhibitor is 200 g/t-800 g/t, the addition amount of the zinc collector is 20 g/t-100 g/t, the zinc collector is at least one of O-isopropyl-N-ethylthiocarbamate, azoxystrobin and alkyl dithiophosphate, and the size mixing time is 2 min-10 min.
  10. 10. The use according to claim 9, characterized in that in step S5 the addition of the combined inhibitor is 50 g/t-300 g/t, the zinc tailings from the concentration process are returned to the roughing stage as middlings, the addition of the zinc collector is 5 g/t-15 g/t, the zinc collector is at least one of O-isopropyl-N-ethylthiocarbamate, azonitrile sulfate, alkyl dithiophosphate, and the zinc scavenger tailings from the scavenging process are returned to the concentration stage.

Description

Combined inhibitor and application thereof Technical Field The invention belongs to the technical field of mineral processing, and relates to a combined inhibitor and application thereof. Background At present, research on flotation separation of lead-zinc sulfide ores at home and abroad is mainly focused on flotation technology and medicament aspects. The lead zinc sulfide ore floatation process mainly comprises the processes of preferential floatation, full-mixing floatation, partial-mixing floatation, floatable floatation, branched speed-dividing floatation, potential regulation floatation and the like. Lime (CaO) is one of the most commonly used inorganic inhibitors in traditional lead-zinc sulfide ore flotation, and reacts with water in ore pulp to generate calcium hydroxide, so that the pH value of the ore pulp is remarkably improved, and meanwhile, hydrophobic substances such as Ca (OH) 2 and the like are generated on the surfaces of sphalerite and pyrite, so that the inhibition of sphalerite and pyrite is realized. However, excessive use of lime not only can reduce the recovery rate of associated gold and silver in lead-zinc ores, but also can easily generate CaCO 3 precipitate in pipelines and stirring tanks to block equipment and increase cleaning cost. Meanwhile, tail water generated by a high-alkali process using lime is alkaline wastewater with the pH value of more than 12, cannot be directly discharged, needs to be adjusted by adding acid, and has high purification treatment cost for discharging the tail water up to the standard. In addition, the existing lime-free inhibitor still has the following defects of inconvenient use, large use amount and high cost, the main components are organic medicaments, degradation is difficult, secondary pollution is easy to bring, and calcium ions exist to easily cause scaling of a flotation pipeline. Disclosure of Invention The invention aims to solve the technical problem of overcoming the defects of the prior art and providing a combined inhibitor which is convenient to use, low in cost, good in inhibition effect and environment-friendly and application thereof. In order to solve the technical problems, the invention adopts the following technical scheme: The combined inhibitor comprises the following raw material components in percentage by weight: 40% -70% of sodium metabisulfite, 20% -40% Of sodium thiosulfate, 1% -15% Of tannin extract, 1% -10% Of humate. The combined inhibitor is further improved, wherein the tannin extract is at least one of valonea extract, bayberry tannin extract and larch tannin extract, and the humate is sodium humate or potassium humate. As a general technical concept, the invention also provides application of the combined inhibitor in lead zinc ore dressing. The application is further improved, the combined inhibitor is used for lead zinc ore dressing in the form of a combined inhibitor solution, the mass concentration of the combined inhibitor in the combined inhibitor solution is 10%, and the combined inhibitor solution is prepared by dissolving the combined inhibitor into water. The above application, further improved, said application comprising the steps of: s1, grinding and grading lead-zinc ores to obtain raw ore pulp; s2, adding zinc sulfate and a combined inhibitor into raw ore pulp, pulping, and adding a lead collector for roughing to obtain lead roughing concentrate and lead roughing tailings; S3, adding zinc sulfate and a combined inhibitor into the lead roughing concentrate for concentration to obtain lead concentrate; S4, adding an activating agent and a combined inhibitor into the lead tailings, pulping, and adding a zinc collector for roughing to obtain zinc roughing concentrate and zinc roughing tailings; s5, adding a combined inhibitor into the zinc roughing concentrate for concentrating to obtain zinc concentrate, and adding a zinc collector into the zinc roughing tailings for scavenging to obtain zinc tailings. In the application, further improved, in the step S1, the fineness of the raw ore pulp is-0.074 mm and accounts for 60% -80%, and the mass concentration of the raw ore pulp is 30% -45%. In the application, in the step S2, the addition amount of zinc sulfate is 200 g/t-600 g/t, the addition amount of the combined inhibitor is 200 g/t-600 g/t, the addition amount of the lead collector is 50 g/t-150 g/t, the lead collector is added into raw ore pulp in the form of lead collector solution, the mass concentration of the lead collector in the lead collector solution is 5%, the lead collector solution is prepared by dissolving the lead collector in water, the lead collector is at least one of alkyl dithiophosphate, butylammonium black medicine, 25# black medicine and ethionazide, and the pulp mixing time is 3-10 min. According to the application, in the step S3, the addition amount of the zinc sulfate is 50-300 g/t, the addition amount of the combined inhibitor is 50-300 g/t, the lead concentration tailings