Search

CN-122006908-A - Cassiterite flotation combined inhibitor and application thereof

CN122006908ACN 122006908 ACN122006908 ACN 122006908ACN-122006908-A

Abstract

The invention discloses a cassiterite flotation combination inhibitor and application thereof, the combination inhibitor consists of N- (phosphonomethyl) glycine and carboxymethyl cellulose. According to the invention, through the synergistic combination of N- (phosphorylmethyl) glycine and carboxymethyl cellulose, wherein the N- (phosphorylmethyl) glycine is used as a molecular anchoring agent, the accurate identification and locking of calcium active sites on the surfaces of minerals such as calcite and fluorite are realized through specific chelation, the carboxymethyl cellulose is used as a space barrier and a film forming agent, a compact, hydrophilic and stable three-dimensional coating film is formed on the basis of anchoring, long-acting three-dimensional shielding is provided, the functions of the two layers are complementary and synergistic, the high-strength and high-selectivity inhibition of calcium-containing gangue can be realized on the premise of basically not influencing the floatability of the cassiterite, the separation efficiency and the concentrate quality of the cassiterite and the calcium-containing gangue minerals are obviously improved, the inhibition effect is durable and stable, the content of calcium impurities in the tin concentrate can be effectively reduced, and the quality and the separation efficiency of the tin concentrate are improved.

Inventors

  • Bai Zhongdui
  • WU GENJI
  • XIAO GUANGJIAN
  • LAN XIXIONG
  • XIE XIAN
  • SHEN CHANG
  • YANG NA
  • WEI HUIFU
  • LI JINWEN
  • LI CHENGPENG
  • Dian Yunjun

Assignees

  • 云南华联锌铟股份有限公司

Dates

Publication Date
20260512
Application Date
20260212

Claims (10)

  1. 1. A cassiterite flotation combined inhibitor is characterized by comprising N- (phosphorylmethyl) glycine and carboxymethyl cellulose.
  2. 2. The cassiterite flotation combination inhibitor according to claim 1, wherein the N- (phosphorylmethyl) glycine is analytically pure with purity not less than 95% and is in powder form, and the carboxymethyl cellulose is of type I, M.W.70000 (DS=0.9) and 2500-4500 Pa.s; wherein the mass ratio of N- (phosphorylmethyl) glycine to carboxymethyl cellulose is 0.5-1.5:1.
  3. 3. The method of using a combination inhibitor of cassiterite flotation according to claim 1 or 2, wherein the combination inhibitor is used in a process for the flotation separation of cassiterite minerals from calcium-containing minerals.
  4. 4. The method of claim 3, wherein the flotation comprises 1 rougher, 2-4 scavenger and 2-3 cleaner, and the combined inhibitor is added during rougher and cleaner.
  5. 5. The application of the cassiterite flotation combined inhibitor according to claim 4, wherein the addition amount of the combined inhibitor in the 1-time roughing process is 200-400 g/t.
  6. 6. Use of a cassiterite flotation combination depressant according to claim 3, characterized in that: the application comprises the following steps: (1) Preparing cassiterite ore pulp, and regulating the pH value of the ore pulp to 8-10; (2) Sequentially adding an activating agent, an inhibitor and a collecting agent into the ore pulp, and carrying out roughing to obtain rough concentrate and rough tailings; (3) Adding a collecting agent into the obtained coarse tailings, and scavenging for 2-4 times to obtain scavenging concentrate, wherein no foaming agent is added in the last scavenging operation; (4) And adding an inhibitor into the obtained rough concentrate, and carrying out concentration for 2-3 times to obtain tin concentrate.
  7. 7. The application of the cassiterite flotation combination inhibitor according to claim 6, wherein in the roughing process, the activator is lead acetate, and the addition amount is 50-100 g/t; the addition amount of the combined inhibitor is 200-400 g/t; the collecting agent is sodium oleate, and the adding amount is 800-1200 g/t.
  8. 8. The application of the cassiterite flotation combination inhibitor is characterized in that in the 2-4 times of scavenging process, the collector is sodium oleate, the collector addition amount in the scavenging I operation is 400-600 g/t, the collector addition amount in the scavenging II operation is 200-300 g/t, the collector addition amount in the scavenging III operation is 100-150 g/t, and the collector addition amount in the scavenging IV operation is 50-75 g/t.
  9. 9. The method of claim 6, wherein the amount of inhibitor added in the process of selecting the cassiterite flotation combination inhibitor is 100-200 g/t in the process of selecting the cassiterite flotation combination inhibitor for 2-3 times, the amount of inhibitor added in the process of selecting the cassiterite flotation combination inhibitor for II is 50-100 g/t, and the amount of inhibitor added in the process of selecting the cassiterite flotation combination inhibitor for III is 25-50 g/t.
  10. 10. The application of the cassiterite flotation combined inhibitor according to claim 7, wherein the combined inhibitor is added in the form of an aqueous solution with the mass percentage concentration of 0.5% -1%; The lead acetate is added in the form of an aqueous solution with the mass percentage concentration of 1-5%; The sodium oleate is added in the form of an aqueous solution with the mass percentage concentration of 1-5%.

Description

Cassiterite flotation combined inhibitor and application thereof Technical Field The invention relates to a cassiterite flotation combination inhibitor and application thereof, and belongs to the technical field of mineral flotation separation. Background Tin is generally an important strategic nonferrous metal, the main industrial mineral of which is cassiterite, and cassiterite flotation is a core process for realizing efficient recovery and purification of tin resources. In the flotation of complex cassiterite symbiotic ores, the efficient separation of calcium-containing gangue minerals such as calcite, fluorite and the like from cassiterite is always an industry common problem. The surface of the calcium-containing gangue mineral has a large number of active Ca2+ sites, the floatability of the calcium-containing gangue mineral is highly overlapped with that of the cassiterite, the calcium-containing gangue mineral is extremely easy to float up synchronously with the cassiterite in the flotation process, the calcium content of the tin concentrate exceeds standard, the separation efficiency is low, and the efficient utilization of cassiterite resources is severely restricted. At present, the existing inhibitors for cassiterite flotation have the technical defects of poor selectivity, poor inhibition effect, poor environmental compatibility and the like, the traditional inorganic inhibitors such as water glass have limited adsorption selectivity on calcium-containing gangue, the inhibition effect can be achieved only by excessive addition, the problem of covering fine mud of ore pulp is easy to cause, normal floatation of cassiterite is interfered, and sodium hexametaphosphate can complex Ca2+, but the non-selective action can damage the surface activation sites of the cassiterite, so that the recovery rate of the cassiterite is reduced. Although partial small molecule inhibitors or heavy metal salt inhibitors have certain inhibition effect, the problems of high toxicity, easiness in causing process pollution and the like exist, and the green mineral separation requirements are not met. And single organic inhibitors such as tannic acid and carboxymethyl cellulose can not realize the synergistic effect of 'accurate adsorption, long-acting hydrophilia and three-dimensional shielding' at the same time, and the tannic acid adsorption layer has poor stability, and the carboxymethyl cellulose (CMC) has insufficient selectivity, is easy to generate nonspecific inhibition on cassiterite, and is difficult to meet the high-efficiency separation requirement of complex cassiterite ores. Therefore, the development of a novel and efficient cassiterite flotation combination inhibitor is a key point for solving the technical problems. Disclosure of Invention Aiming at the defects and shortcomings in the background art, the invention improves and innovates the defects, and aims to provide the cassiterite flotation combination inhibitor with strong inhibition effect and environmental friendliness and the application thereof, and the cassiterite and the calcareous gangue minerals are subjected to high-efficiency and high-selectivity flotation separation by enhancing the adsorption capacity on the surfaces of the calcareous gangue minerals and improving the hydrophobicity of the surfaces of the cassiterite. In order to solve the problems and achieve the above-mentioned objects, the present invention provides a cassiterite flotation combination inhibitor and its application, which is realized by adopting the following design structure and the following technical scheme: A cassiterite flotation combination inhibitor consisting of N- (phosphonomethyl) glycine and carboxymethyl cellulose. Preferably, the N- (phosphorylmethyl) glycine is analytically pure, the purity is more than or equal to 95%, and the N- (phosphorylmethyl) glycine is in a powder form, wherein the carboxymethyl cellulose is of a type I, M.W.700000 (DS=0.9), and 2500-4500 Pa.s; wherein the mass ratio of N- (phosphorylmethyl) glycine to carboxymethyl cellulose is 0.5-1.5:1. Preferably, the combined depressant is used in a flotation separation process of cassiterite minerals from calcium-containing minerals. Preferably, the flotation comprises 1 rougher, 2-4 scavenger and 2-3 cleaner, and the combined inhibitor is added in the rougher and cleaner process. Preferably, the addition amount of the combined inhibitor in the 1-time roughing process is 200-400 g/t. Preferably, the application comprises the steps of: (1) Preparing cassiterite ore pulp, and regulating the pH value of the ore pulp to 8-10; (2) Sequentially adding an activating agent, an inhibitor and a collecting agent into the ore pulp, and carrying out roughing to obtain rough concentrate and rough tailings; (3) Adding a collecting agent into the obtained coarse tailings, and scavenging for 2-4 times to obtain scavenging concentrate, wherein no foaming agent is added in the last scavenging operation; (4)