Method of processing industrial mineral stock to extract valuable and/or toxic components

FIELD: metallurgy.

SUBSTANCE: proposed method consists in leaching of valuable and/or toxic components. Prior to leaching, sintering of mineral stock is executed by cement, calcium oxide and solution produced by mixing active soda solution subjected to photoelectrochemical treatment with leaching reagents. After sintering, pile is made from sintered material. Leaching consists in sprinkling said pile by water or aforesaid active soda solution.

EFFECT: higher efficiency.

1 ex

 

The invention relates to hydrometallurgy of non-ferrous and precious metals, namely, to the hydrometallurgical processing of technogenic mineral formations, and is intended for industrial extraction of valuable metals.

There is a method of processing tailings flotation of polymetallic ores, whereby the flotation tailings are subjected to hydraulic classification on the Sands and slimes. Sands enrich the concentration on the tables with cleanings, tails gravity separation gospelchor, platinuum and get sulfide concentrates from which to extract productive components (see application RU # 93046294, IPC6WV 7/00, publ. 20.05.1996).

The disadvantage of this method is low efficiency due to the inability to extract fine gold, constituting the bulk of inventory man-made structures, which are related to technical capabilities of the equipment used, as well as great work method by processing a large volume of mineral raw materials.

Closest to the claimed method is man-made mining gold placers, including todopoderoso, leaching reagent solution, maturation and recovery of gold, and before leaching gold concentrate in the bottom of the cuvette flow of water (see patent RU is 2112061, IPC SW 11/00, publ. 27.05.1998).

The effectiveness of this method also is not large enough due to the processing of a large volume of mineral raw materials, considerable time and reagent consumption for leaching.

The technical result of the invention is to increase the efficiency of the method of processing mineral waste by reducing time, volumes of mineral processing and saving of reagents for extraction productive components as valuable industrial and toxic.

This technical result is achieved in that in the method of recycling of mineral waste, including the allocation of mineral mass commercially valuable and/or toxic components, prior to extraction of the mineral mass of commercially valuable and/or toxic components produce agglomeration (pelletizing) mineral mass of cement, calcium oxide and a solution obtained by mixing the active soda solution, subjected photoelectrochemical processing, with the main leaching reagents, and the allocation of mineral mass commercially valuable and/or toxic components is carried out by formation of agglomerated material stacks and irrigation stacks of water, or active soda solution, subjected to photoelectron the chemical processing, solution or basic leaching agents.

Distinctive features of the proposed method is that before leaching produce agglomeration (pelletizing) mineral mass of cement, calcium oxide and active soda solution obtained by photoelectrochemical processing, putting him in the main leaching agents, resulting in the active components of the solution begin to diffuse into the mineral matrix containing dispersed gold with intense leaching of iron bicarbonates, oxidation of the sulfur with the formation of sulfates and leaching "free" and included in the mineral matrix of gold. At the same time pelletized material retains good permeability with subsequent irrigation water or leaching solutions of low concentration.

Thus, the set of distinctive features improves the efficiency of the method of development of technogenic mineral formations at the expense of reduction of time, the amount of processing of mineral raw materials and conserve reagents.

The method is as follows.

In photoelectrochemical reactor prepare active soda solution by sparging air and series-parallel electrolysis and UV-light is in the range of 180-300 nm, which, after putting him in the primary leach reagent or without adding additional components, together with cement and lime used for agglomeration of technogenic mineral mass, containing useful components. After work in a rotary kiln mineral mass is placed in stacks, which surface is irrigated with water, the active soda solution, subjected to photocatalytic treatment or leaching solution. After that, the solutions are collected in a drainage ditch, are analyzed for the presence of valuable metals and after doreplace served on re-irrigation. The cycle continues until it reaches the solutions of the required concentrations of metals, after which they are served on the sorption column.

An example of a specific implementation of the method.

The method was carried out on the tailings generated from the waste products of processing Novoshirokinskoye deposits of gold-lead-zinc (polymetallic) ores containing silver. Silver, and zinc due to the low residual concentrations are not of industrial interest, but are pollutants to the environment (residual lead content is not critical, especially since he practically no migration is the active ingredient in a slightly alkaline environment). Therefore, these elements should be so is e extracted from the tailings of flotation enrichment.

In photoelectrochemical reactor was preparing active 10%soda solution by bubbling air for oxygen saturation, advanced electrolysis for 1 hour and subsequent irradiation with UV light in the range of 180-300 nm lamps CES-230, with continued electrolysis within 15 minutes After photoelectrolysis solution was injected sodium cyanide at the rate of 500 g/t, as the primary leach reagent. The resulting solution together with cement and lime used for agglomeration tailings containing useful (gold) and toxic (silver and zinc) components. After work in a rotary kiln mineral mass was placed in stacks, with which the surface was irrigated with water. Within the stacks were formed leaching reagent solution is optimal concentration. Then the solutions were collected in a drainage ditch, were analyzed for the presence of gold and after doreplace was filed for re-irrigation. The cycle continued until the desired metal concentrations to 3 mg/l AI, 15 mg/l silver, 130 mg/l of zinc in the output solution. After this solution was applied to coal-ionite sorption columns. The gold concentration in a mixture of coal and tar was 5 mg/g of silver 30 mg/g, zinc 250 mg/galee coal and resin went on desorption.

The method of processing of technog the frame of mineral raw materials extraction of commercially valuable and/or toxic components, including leaching, characterized in that before leaching produce agglomeration of mineral waste cement, calcium oxide and a solution obtained by mixing the active soda solution, subjected photoelectrochemical processing, leaching reagents, with the subsequent formation of agglomerated material of the pile and the lead leaching irrigation pile with water or the active soda solution, subjected to photocatalytic treatment or solution leaching agents.



 

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2 tbl, 2 ex

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4 tbl, 1 ex

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