Carbon inhibitor and application thereof in molybdenum-nickel flotation from high-carbon molybdenum-nickel ores

Abstract

The invention discloses carbon inhibitor and application thereof in molybdenum-nickel flotation from high-carbon molybdenum-nickel ores. The carbon inhibitor contains, by weight, 40-120 parts of acid orange, 20-60 parts of ethyl tert-butyl ether, and 60-180 parts of CMC (carboxymethyl cellulose). The invention further discloses a flotation method using the carbon inhibitor. The flotation method includes the steps of grinding, molybdenum flotation and nickel flotation; each of the molybdenum flotation and nickel flotation steps includes one to two times of roughing, two to four times of concentration and one to three times of scavenging; molybdenum concentrate and nickel concentrate are finally obtained. Compared with the prior art, the carbon inhibitor and the floatation method thereof have the advantages that separation efficiency is high, molybdenum-nickel ores and carbon can be effectively separated, grade of the molybdenum and nickel concentrates is increased, beneficiation cost is low, the process flow is simple and reliable, and usage and operation are easy.

Description

technical field [0001] The invention relates to a mineral flotation separation method, in particular to a method for flotation high-carbon nickel-molybdenum ore. Background technique [0002] High-carbon molybdenum-nickel ore is a unique layered molybdenum deposit discovered in the Lower Cambrian black shale in the ancient basin along the southern Yangtze River in the 1960s. It is different from traditional nickel sulfide and molybdenum sulfide ores. The main feature of high-carbon molybdenum-nickel ore is high carbon content. In addition to containing molybdenum, it contains associated rare and precious metals such as vanadium, phosphorus, copper, lead, zinc, uranium, platinum and palladium. It has very high development and utilization value, and high carbon molybdenum Nickel ore reserves are very rich, mainly distributed in Hunan, Guizhou, Yunnan and other places. Only the high-carbon molybdenum-nickel ore reserves in Xiangxi, Hunan Province are more than 10 million tons. ...

AI Technical Summary

Problems solved by technology

[0003] High-carbon molybdenum-nickel ore has high carbon content, complex ore properties, and very difficult ore dressing. Currently, the beneficiation and smelting process for recycling high-carbon molybdenum-nickel ore is manual selection, roasting, and alkali leaching to recover molybdenum to obtain ammonium molybdate. The efficiency is low, and only high-grade molybdenum ore containing more than 3% molybdenum can be recovered

Low-grade molybdenum ore contains less than 1.5% molybdenum. The traditional dressing and smelting process loses money and cannot be recycled. The only way to enrich the low-grade high-carbon molybdenum-nickel ore to more than 3% is through ore dressing for smelting and recycling.

[0004] In the beneficiation process of high-carbon molybdenum-nickel ore, due to the adsorption of carbonaceous substances, the dosage of molybdenum-nickel flotation reagents will increase first, which is more than twice the conventional dosage of flotation reagents. increase; secondly, in the beneficiation process, the carbonaceous matter will desorb the flotation agent adsorbed on the surface of the target mineral, and the flotation agent must be added during the beneficiation process, resulting in a decrease in the concentrate grade and an increase in the amount of beneficiation agents; thirdly, containing The carbonaceous surface of mechanical carbon is extremely hydrophobic, which is difficult to be suppressed, resulting in lower grades of molybdenum and nickel concentrates, higher silicon and aluminum contents, and increased smelting costs

[0005] The ore properties of high-carbon molybdenum-nickel ore are complex, and flotation is extremely difficult. There are few researches on flotation of high-carbon molybdenum-nickel ore at home and abroad. The method of selecting nickel and molybdenum, the method takes a long time for flotation, and the beneficiation index is poor

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