Separation and recovery method for ultralow-grade refractory copper-molybdenum sulfide ore

Abstract

The invention discloses a separation and recovery method for ultralow-grade refractory copper-molybdenum sulfide ore, and belongs to the technical field of dressing and smelting of ultralow-grade copper-molybdenum ore. The technical problem to be solved by the invention is to fully extract resources in ore and solve the current technical problems of high cost, difficult process control and serious environmental pollution of a traditional process method. The invention researches and develops a magnetic separation and flotation combined synergistic separation and recovery process. The method comprises the following steps: firstly, carrying out bulk flotation on copper-molybdenum mixed sulfide ore to obtain copper-molybdenum mixed rough concentrate; the copper-molybdenum mixed rough concentrate is separated in advance through magnetic separation, and magnetic separation concentrate copper sulfide and magnetic separation tailing molybdenum sulfide are obtained; and finally, magnetic concentrate and tailings are enriched again through flotation, and copper sulfide concentrate products and molybdenum sulfide concentrate products are obtained finally. According to the magnetic separation and flotation combined synergistic separation and recovery process, economic and efficient recovery of copper-molybdenum mixed sulfide ore resources of different grades can be achieved, the use amount of sodium sulfide can be greatly reduced, the working environment is improved, and the environmental protection risk is reduced.

Description

technical field [0001] The invention belongs to the technical field of dressing and smelting of ultra-low-grade copper-molybdenum ores; in particular, it relates to a method for separating and recovering ultra-low-grade refractory copper-molybdenum sulfide ores. Background technique [0002] my country is the main consumer market for copper and molybdenum metal resources in the world. Copper and molybdenum ore resources are generally relatively rich. However, with years of mining and utilization, the traditional easy-to-select high-grade copper sulfide and molybdenum resources are increasingly depleted, and most of the remaining The resources belong to refractory low-grade copper-molybdenum ores, most of which have a Cu grade of 0.3-0.5% and a small amount of resources with a Mo grade below 0.1% have not been fully recycled. At present, most of the high-grade copper-molybdenum mixed sulfide ores are processed and recovered by the process of "sequentially preferential flotatio...

AI Technical Summary

Problems solved by technology

At present, most of the high-grade copper-molybdenum mixed sulfide ores are processed and recovered by the process of "sequentially preferential flotation, that is, the current flotation of molybdenum sulfide minerals and the recovery of copper sulfide minerals". This process mainly uses sodium sulfide to suppress Copper sulfide minerals are separated from molybdenum sulfide minerals. The main disadvantages of this type of process are that the amount of sodium sulfide is large, and sodium sulfide is easy to oxidize and fail during the flotation process, resulting in difficult operation, and the hydrolysis of sodium sulfide to generate hydrogen sulfide gas, resulting in harsh working conditions. , serious pollution, high overall beneficiation cost

Therefore, how to realize the separation and recycling of low-grade copper-molybdenum sulfide ore in an environmentally friendly and economical way, fully extract the resources in the ore, and at the same time solve the high cost, difficult process control and serious environmental pollution of traditional processes are current technical problems.