Method for converting cyanide tailings into lead concentrate, Turnbull's blue pigment, road foundation stone and road foundation stone brick

Abstract

The invention relates to a method for converting cyanide tailings into lead concentrate, a Turnbull's blue pigment, road foundation stone and a road foundation stone brick. The method comprises the following specific steps that the cyanide tailings are blended into easy-to-flow ore pulp by using water, and the easy-to-flow ore pulp is conveyed to a stirring pool; the ore pulp is washed under a condition of determining a height of an overflow port and a stirring speed, then filtering and solid-liquid separation are conducted, the road foundation stone is produced from solid, and cyanogen removal is conducted on liquid to synthesize the Turnbull's blue pigment; washed heavy minerals are sorted into coarse grains and fine grains by means of a cyclone, and then gravity separation is conducted by using a blanket type gravity separator to separate out the lead concentrate; the road foundation stone and brick are produced by conducting gravity separation on tailings; a complexing principle is adopted for water treatment, and soluble cyanide is changed into water-insoluble ferric ferrocyanide precipitate; and precipitating and filtering are conducted to produce the blue pigment, and the water is recycled. The method is low in total investment, good in effect, low in cost, high in additional value, free of secondary pollution, remarkable in recycling effect and easy in large-scale treatment, and has good environmental benefits and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of solid waste resource treatment, and in particular relates to a method for converting red slag into lead concentrate, Teng's blue pigment, roadbed stones and roadbed stone bricks. Background technique [0002] Luanchuan County, Luoyang City is known as the "Molybdenum Capital" and is a super-large molybdenum ore field in China. However, with the large-scale mining of molybdenum ore, there are more and more tailings from Luanchuan molybdenum mine. These fine-grained tailings have not been effectively utilized at present, not only occupy a large amount of land, but also have high disposal costs, and there are also environmental and safety hazards. [0003] There are four known methods of comprehensive utilization of molybdenum ore tailings as follows: (1) Re-selection of useful mineral materials after tailings mining: Affected by the early backward mineral processing technology and mineral processing method...

AI Technical Summary

Problems solved by technology

These fine-grained tailings have not been effectively utilized at present, not only occupy a large amount of land, but also have high disposal costs, and there are also environmental and safety hazards

[0003] There are four known methods of comprehensive utilization of molybdenum ore tailings as follows: (1) Re-selection of useful mineral materials after tailings mining: Affected by the early backward mineral processing technology and mineral processing methods, there are still many valuable minerals in the tailings. Therefore, the useful mineral materials re-selected after the tailings in the tailings pond are mined can bring certain economic benefits to the enterprise. However, this re-selection or re-selection method will still produce solid waste, which brings Secondary environmental pollution; (2) Tailings used as building materials: A number of tailings experimental studies have shown that tailings rich in calcium and silicon can replace clay containing calcium and silicon after calcination, and can be used as a base for Portland cement. Raw materials can produce high-quality tailings Portland cement with good performance, normal coagulation and stability, but limited by the location of cement clinker manufacturers, the transportation cost is too high, and large energy-consuming enterprises go to The general trend of production capacity countries and stricter environmental protection, a large number of cement clinker manufacturers have closed down, which limits the use of tailings to produce cement; (3) tailings are used to make fertilizers: some tailings contain Zn and Mn needed for plant production , Cu, Mo, V, B and other trace elements, which are necessary to maintain plant growth and development, can be made into trace element fertilizers for soil improvement after proper treatment. This method seems feasible, but there is no Possibility of actual operation, because various flotation agents and other toxic substances are inevitably adsorbed in the tailings, and the cost of pretreatment alone is not worth the loss; (4) Filling the goaf of the mine: This method is in line with the development of green mines and the long-term sustainable development of the mining industry , but it is not practical, because the ore is dug out from the mountain and transported to the concentrator, and there are few enterprises that combine mining and beneficiation. hard to accomplish