Method for separating copper and molybdenum from slime-containing sulfur-containing low-grade copper-molybdenum ore

Abstract

The invention discloses a method for separating copper and molybdenum from slime-containing sulfur-containing low-grade copper-molybdenum ore. The process flow of the method sequentially comprises anore grinding process, a copper molybdenum mixed flotation process, a desliming and desulfurizing process and a copper molybdenum separation flotation process; the copper molybdenum mixed flotation process comprises a mixed floatation rough floatation procedure, a mixed floatation scavenging floatation procedure and a mixed flotation fine floatation procedure; and the desliming and desulfurizing process comprises at least one-time desliming and desulfuration rough floatation procedure, at least one-time desliming and desulfuration scavenging floatation process and at least one-time desliming and desulfurizing fine floatation process. According to the method, when the raw ores contain a lot of slime and pyrite, the technical means can be applied to achieve the effect of throwing and removingthe slime and the pyrite in the copper-molybdenum mixed concentrate so that the relatively pure copper-molybdenum mixed concentrate can be provided for subsequent operation of the copper-molybdenum separation, the aim of the subsequent operation of copper-molybdenum separation can be smoothly realized, the qualified copper concentrate and the qualified molybdenum concentrate can be obtained, andthe recovery of useful metals is not affected at the same time.

Description

Technical field [0001] The invention relates to the technical field of ore dressing production, in particular to a method for separating copper and molybdenum from a low-grade copper-molybdenum ore containing mud and sulfur. Background technique [0002] In my country, molybdenum resources are very rich, accounting for about 37% of the world's total explored molybdenum resources, and the molybdenum deposits discovered in China are mainly derived from porphyry copper-molybdenum deposits and skarn-type copper-molybdenum deposits. The effective flotation process of copper and molybdenum separation has always been a major research topic in the field of mineral processing. In recent years, domestic and foreign mineral processing scientific researchers have carried out a lot of research work. However, copper and molybdenum resources have many poor ore and rich ore, severe co-occurrence of copper and molybdenum, many unfavorable material components, fine intercalation particle size, and...

AI Technical Summary

Problems solved by technology

[0004] However, due to the high content of primary slime in mud-containing and sulfur-containing low-grade copper-molybdenum ore and the hardness of the ore is different, the overgrinding phenomenon of the first-stage grinding products is serious, and the content of secondary slime is large. Using the above-mentioned existing technical solutions to develop copper-molybdenum Separation is basically impossible to achieve, because: 1. The copper-molybdenum grade of the raw ore is relatively low and the mud and sulfur content are high, which makes it difficult to improve the copper-molybdenum grade of the mixed concentrate, and the separation of copper and molybdenum is very difficult

2. The high content of ore slime not only increases the amount of chemicals used in the copper-molybdenum mixed flotation and copper-molybdenum separation flotation processes, but also the severe muddying of the copper-molybdenum separation section will lead to deterioration of the flotation environment, and the separation of copper and molybdenum will not be achieved, which will also cause molybdenum Unqualified concentrate products, adverse effects of low molybdenum recovery rate

3. The sludge is not easy to settle, and the sludge in the copper-molybdenum separation backwater will continue to accumulate and be reused in the process, which will worsen the flotation environment

4. Sulfur impurities enter the copper-molybdenum separation system, resulting in unqualified grade of molybdenum concentrate

5. If the influence of slime and sulfur content in the mixed flotation of copper and molybdenum will affect the recovery rate index of copper and molybdenum, reduce the recovery rate of mixed separation of copper and molybdenum, which is not good for economic indicators

6. Part of the slime enters the copper concentrate or molybdenum concentrate, which not only affects the grade of the concentrate product, but also causes a series of problems such as difficult settlement and filtration and high moisture content of the concentrate product

But in the actual processing process, this kind of processing method still has the following defects: 1. When running into the raw ore with a large amount of mud and pyrite, the quality of the intermediate product of copper-molybdenum mixed concentrate is relatively low. The specific performance is that the copper grade is low, the molybdenum grade is low, the mud content is high, and the pyrite content is high. The separation of copper and molybdenum cannot take into account the selective separation of pyrite, ore slime and molybdenum minerals, and finally results in molybdenum concentrate unqualified

2. When dealing with a large amount of slime and pyrite in the raw ore, it is necessary to adjust the mixed flotation operation. This adjustment can play a certain role, but it is still difficult to produce qualified copper concentrate and molybdenum concentrate

At the same time, the adjustment of the mixed flotation operation can easily cause the loss of useful metals such as copper and molybdenum from the tailings, which is not conducive to the improvement of production efficiency

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