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Click to add WeChatFlotation is the main beneficiation method for chalcopyrite. In the flotation process, the use of chemicals is particularly important. Since the copper mineral itself has good floatability, collectors are often used as the main choice in the selection of chemicals. . Currently, the commonly used chalcopyrite flotation collectors mainly include xanthate, black powder, sulfur and nitrogen and some new collectors. Let’s learn about it together below!
This type The collectors mainly include four types of compounds: xanthate, bixanthate, xanthate and thiourethane, and thiourethane. Among them, xanthate has strong collection ability, but its selectivity is poor. It will float other sulfide ores together, increasing the subsequent mineral processing and separation process. The selectivity and collection ability of compound xanthate are better than those of single xanthate; double xanthate is difficult to dissolve in water and is more stable than xanthate in acidic medium. When the pH value increases, it will gradually decompose into xanthate. ; Xanthate ester agent is an excellent collector for flotation of Cu, Au, Pb, zn, Hg, Mo and other sulfide ores; thiourethane has the characteristics of strong selectivity and low dosage, among which ethylthiocarbamate (z -200) is the more commonly used thiocarbamate collector.
Black drug and derivatives The collector has good selectivity, but the collection ability is slightly poor. It is mostly used for sorting copper ores containing pyrite, mainly including black powder, double black powder and black powder ester. Among them, the usage rate of black drug is second only to xanthate. No. 15 black drug and No. 25 black drug are commonly used. They have strong foaming ability. When flotating copper, the dosage of foaming agent can be reduced; double black agent is difficult to dissolve in water and is pure. Among the low-molecular disulfide, R is methyl, isopropyl, isobutyl and phenyl, which are solid agents, and the rest are liquids; the scientific name of the disulfide ester is hydrocarbyl dithiophosphate thioether ester, which is a black Derivatives of the drug can maintain good selectivity under low pH conditions (Ph=5).
Used for selecting chalcopyrite The main sulfur and nitrogen collectors are ethyl sulfur nitrogen and sulfur nitrogen esters. Among them, ethyl sulfide is prepared by reacting diethylamine, carbon disulfide, sodium hydroxide and water in a molar ratio of 1.07:1:1:2 in an ice-salt water bath. This agent has similar properties to xanthate , but the collection effect is better than that of xanthate and the collection performance is stronger; sulfur nitrogen ester is more resistant and selective than sulfur nitrogen. It is prepared by the reaction of sulfur nitrogen and olefin compounds. It is mainly There are several types of thiazide propenyl ester, thiazide propenitrile ester and thiazide proponitrile ester (ester 105).
The above are the types of collectors commonly used in chalcopyrite flotation. In the actual mineral processing process, reagents How to choose the type and the reasonable dosage of chemicals need to be analyzed through ore dressing test. Therefore, it is recommended to conduct a beneficiation test first, and based on the properties of chalcopyrite ore Design a reasonable flotation process and customize the appropriate chemical type and dosage.
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