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Click to add WeChatIn the flotation process of chalcopyrite, the choice of process is very important, and the choice of reagents is also very important. Only by choosing the right reagents can the minerals be effectively captured and suppressed, and the minerals can be fully separated. In the previous article, we talked about the flotation method of chalcopyrite. This article will introduce chalcopyrite flotation reagents. At present, the most commonly used reagents in chalcopyrite flotation operations are collectors, and the types of reagents include xanthate and its derivatives collectors, black medicine and its derivatives collectors, sulfur and nitrogen collectors and some new collectors.
This type of collector mainly includes four types of compounds: xanthate, dixanthate, xanthate esters and thiocarbamates.
Xanthate: It has strong collection ability, but its selectivity is poor, and it will float other sulfide ores together, increasing the subsequent mineral separation process. The selectivity and collection ability of the composite xanthate are better than those of a single xanthate.
Dual yellow medicine: This agent is difficult to dissolve in water and is more stable than yellow medicine in acidic medium. When the pH value increases, it will gradually decompose into yellow medicine.
Xanthate: This type of agent is an excellent collector for flotation of sulfide ores such as Cu, Au, Pb, Zn, Hg, and Mo.
Thiocarbamate: It has the characteristics of strong selectivity and low dosage. Among them, ethylthiocarbamate (z-200) is a more commonly used thiocarbamate collector.
Black medicine and its derivative collectors have good selectivity, but the collection ability is slightly poor. They are mostly used to sort copper ores containing pyrite. They mainly include black medicine, double black medicine and black medicine ester.
Black medicine: The usage rate is second only to yellow medicine. No. 15 black medicine and No. 25 black medicine are commonly used. They have strong foaming ability and can reduce the amount of foaming agent when flotating copper.
Double black medicine: This agent is difficult to dissolve in water. In pure low-molecular double black medicine, R is methyl, isopropyl, isobutyl and phenyl, which is a solid agent, and the rest are liquid.
Black medicine ester: The scientific name is alkyl dithiophosphate thioether ester, which is a derivative of black medicine. It can maintain good selectivity under low pH conditions (Ph=5).
The sulfur and nitrogen collectors used for chalcopyrite are mainly ethyl thiourea and thiourea esters.
Ethiourea: is prepared by reacting diethylamine, carbon disulfide, sodium hydroxide and water in an ice-salt water bath at a molar ratio of 1.07:1:1:2. The agent has similar performance to yellow medicine, but the collection effect is better than yellow medicine and the collection performance is stronger.
Sulfur nitrogen ester: It is more resistant and selective than sulfur nitrogen. It is prepared by the reaction of sulfur nitrogen and olefin compounds. There are mainly several types of sulfur nitrogen propylene ester, sulfur nitrogen propylene nitrile ester and sulfur nitrogen propylene nitrile ester (ester 105).
The above is an introduction to the flotation process of chalcopyrite and the commonly used flotation collector types. In the actual mineral processing process, how to choose the flotation method and reagent type needs to be determined through mineral processing test analysis. Therefore, it is recommended to conduct mineral processing tests first, design a reasonable flotation process according to the properties of chalcopyrite ore, and customize the appropriate reagent type and dosage.
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