Search

CN-116809239-B - Sulfur and arsenic combined inhibitor and application thereof

CN116809239BCN 116809239 BCN116809239 BCN 116809239BCN-116809239-B

Abstract

The invention discloses a sulfur and arsenic combined inhibitor and application thereof, and belongs to the field of mineral processing flotation. The inhibitor comprises 1-2 parts of lime nitrogen and 4-8 parts of ammonium salt, wherein the ammonium salt is one or two of ammonium thiosulfate and ammonium sulfite. The combined inhibitor has good inhibition effect on pyrite and arsenopyrite, can be used under weak alkaline conditions, reduces lime consumption, has high selectivity, basically has no inhibition effect on copper sulfide ores, has strong adaptability, and can effectively inhibit pyrite and arsenopyrite in copper sulfide concentrate containing chalcopyrite and chalcopyrite. The combined inhibitor has low dosage, can effectively improve the grade of copper sulfide concentrate and reduce the arsenic content.

Inventors

  • LI ZUZHONG

Assignees

  • 青岛鑫润矿业科技有限公司

Dates

Publication Date
20260505
Application Date
20220321

Claims (6)

  1. 1. A sulfur and arsenic combined inhibitor is characterized by comprising 1-2 parts of lime nitrogen and 4-8 parts of ammonium salt, wherein the ammonium salt is one or two of ammonium thiosulfate and ammonium sulfite, and the lime nitrogen, the ammonium thiosulfate and the ammonium sulfite are weighed according to the weight part ratio; The method comprises the steps of adding 1500g/t lime during primary grinding, adding 50-200g/t inhibitor during roughing, adding a collector and a foaming agent after stirring for 5 minutes, wherein the collector is any one of butyl xanthate, mixed base xanthate and methyl thiourethane, carrying out roughing for 1 time, roughing for 3-6 min, scavenging for 2-3 times, scavenging for 2-5 min each time, adding 500g/t lime into roughing concentrate for regrinding, carrying out concentration, adding 20-100g/t inhibitor during concentration, and carrying out concentration for 1-2 times to obtain copper concentrate, wherein the concentration time is 2-5 min each time.
  2. 2. The sulfur and arsenic combined inhibitor according to claim 1, wherein the ore particle size after primary grinding is more than 65% of the fraction of-74 μm.
  3. 3. The sulfur and arsenic combined inhibitor according to claim 1, wherein the ore particle size after regrinding of the roughing concentrate is more than 70% of the fraction of-37 μm.
  4. 4. A sulfur and arsenic combination inhibitor according to claim 1, wherein the pulp has a pH of 8 to 9.
  5. 5. The sulfur and arsenic combined inhibitor according to claim 1, wherein the mass percentage concentration of the ore pulp is 20% -30%.
  6. 6. The sulfur and arsenic combined inhibitor according to claim 1, wherein the inhibitor is prepared into an aqueous solution with a mass concentration of 5% before use, and the total amount of the inhibitor added is 100-400g/t.

Description

Sulfur and arsenic combined inhibitor and application thereof Technical Field The invention relates to the field of mineral processing flotation, in particular to a sulfur and arsenic combined inhibitor and application thereof. Background As is well known, world copper resources are rich and widely distributed, copper ore resources exist in more than 150 countries throughout five continents, and reserves are relatively concentrated; the copper ore in China is mainly sulfide ore, 87% of sulfide ore and 10% of oxidized ore in the ascertained reserves, and only 3% of mixed ore, copper and arsenic minerals are often contained in some gold and silver ore deposits, copper sulfide minerals mainly comprise chalcopyrite, tetrahedrite, copper blue and the like, copper minerals are often densely symbiotic with pyrite, arsenite and the like, arsenic minerals mainly comprise 46% of arsenite (FeAsS) and Fang Shen iron ore (FeAs 2) and 73% of arsenic, and are similar to the generation conditions of copper sulfide minerals, certain physical and chemical properties, so that when the copper sulfide minerals are floated by using a sulfhydryl collector, the arsenite and the arsenic minerals are mixed into concentrate, and the concentrate is often mixed with the concentrate to cause severe pollution of arsenite, arsenite and the like, and arsenic mineral is also polluted by the quality of the high-bearing equipment, arsenical acid and arsenite, arsenite and the like; at present, the methods for separating copper and arsenic at home and abroad mainly comprise the following steps: 1. The method adopts a high-selectivity collector, namely, the difference of floatability of two minerals is enlarged by utilizing the selective collector to separate copper and arsenic, such as adopting some novel high-efficiency collectors, some combined agents and the like; 2. oxidation process: The toxic sand is easy to oxidize by inflation, and the floatability of the toxic sand can be strongly inhibited by long-time stirring or adding various oxidants; 3. The lime-based combined inhibitor is adopted: The toxic sand has different critical pH values as the sulfide minerals, and many researches show that the toxic sand can be separated from metal sulfide to a certain extent by using alkaline regulators such as lime and the like; 4. Inorganic inhibitors such as thioxoic acid are adopted: The test structure shows that the inhibition sequence of the arsenopyrite is Nox medicament, thiosulfate and sodium sulfite; 5. The organic inhibitor is adopted: the organic inhibitor and the inorganic inhibitor are combined for use, so that the effect is more obvious; 6. coarse concentrate regrinding, increasing selection times and other measures to remove arsenic; The above methods have ideal separation effect on chalcopyrite and arsenopyrite, but a proper method cannot be found for flotation of copper-arsenic separation of gold and silver ores containing a large amount of secondary copper minerals all the time, so that arsenic in gold and copper concentrate exceeds standard, copper in gold and copper concentrate cannot be priced, unnecessary loss is caused for mine enterprises, and improvement is urgently needed. Disclosure of Invention (One) solving the technical problems Aiming at the defects of the prior art, the invention provides the sulfur and arsenic combined inhibitor and the application thereof, and the combined inhibitor has good inhibition effect on pyrite and arsenopyrite, high selectivity and strong adaptability, can greatly reduce the arsenic content in copper concentrate and improve the copper grade. (II) technical scheme In order to achieve the aim, the invention provides the technical scheme that the sulfur and arsenic combined inhibitor comprises 1-2 parts of lime nitrogen and 4-8 parts of ammonium salt, wherein the ammonium salt is one or two of ammonium thiosulfate and ammonium sulfite. The invention aims to solve the other technical problem of providing the application of the sulfur and arsenic combined inhibitor, wherein the inhibitor is used for the flotation separation of copper sulfide ore, pyrite and arsenopyrite in copper-sulfur-arsenic mixed ore. The concrete process is that a certain amount of lime is added during primary ore grinding. Adding 50-200g/t inhibitor into the coarse powder, stirring for 5min, and adding collecting agent (butyl xanthate, mixed xanthate, methyl thiourethane, etc.) and foaming agent. After 1 roughing, the roughing time is 3-6 min, 2-3 scavenging, the time for each sweep is 2-5 min. And adding a certain amount of lime into the roughing concentrate, regrinding, and then carrying out concentration, wherein 20-100g/t of inhibitor is added into the concentration, and copper concentrate is obtained after 1-2 times of concentration, and the concentration time is 2-5 minutes each time. Preferably, the ore granularity after primary grinding is more than 65% of the fraction of-74 μm. Preferably, the ore granularity of th