PROCESSING LINE FOR TREATMENT OF ASH-AND-SLAG WASTES, THAT IS, COAL FUEL COMBUSTION PRODUCTS Russian patent published in 2013 - IPC B03B9/04 

FIELD: process engineering.

SUBSTANCE: invention relates to thermal electric power stations and boiler houses running on coke-oven coal. Processing line comprises coupled unit of underfiring extraction, unit of iron-bearing fraction extraction and noble metal extraction unit. Outlet of previous unit tail outlet makes an inlet of the next unit. Underfiring extraction unit comprises intake bin to disintegrate ash-and-slag wastes with its outlet communicated with metal-and-stone extractor intended for regrinding of said wastes. Metal-and-stone extractor said-and-slag outlet is communicated with dispenser of ash-and-slag wastes. Ash-and-slag classifiers represent hydraulic cyclones. First hydraulic cyclone light and fine fraction outlet is communicated via second pipeline with flotation plant inlet. First hydraulic cyclone sand fraction outlet is communicated with accumulation tank with its outlet communicated with the inlet of disintegrator, its outlet being communicated with second hydraulic cyclone sand fraction inlet. Second hydraulic cyclone light and fine fraction outlet is communicated with second pipeline while its sand outlet is connected by second sand pump with accumulation tank. Flotation plant floated material outlet is connected with cleaner, its floated material outlet being connected with first thickener. Sand outlet of the latter is communicated via dehydrator with accumulator and/or underfiring processing means while water outlet is connected via first water pump with water feed pipe to feed water to top section of the first pipeline. Cleaner chamber outlet is connected with flotation plant inlet. Flotation plant chamber outlet is connected with check flotation unit. Its floated material outlet is connected with flotation plant inlet while chamber outlet of check flotation unit is used as inlet of iron-bearing fraction extraction unit. Said unit comprises first, second and check magnetic separators and process line including dehydrators and magnetic fraction driers. Chamber outlet of check flotation unit is connected with first magnetic separator with its magnetic fraction outlet connected via second magnetic separator with dehydrator. First magnetic separator nonmagnetic fraction outlet is connected via check magnetic separator with noble metal extraction unit inlet acting as second thickener. Second magnetic separator nonmagnetic fraction outlet and check magnetic separator magnetic fraction outlet are connected to first magnetic separator inlet. Second thickener sand outlet is connected with first magnetoelectric gravitation unit with its concentrate outlet connected with finishing magnetoelectric gravitation unit and its tail outlet connected with accumulator of materials containing aluminium and silicon oxides and process link including dehydrator and processing means of said fraction. Tail outlet of said finishing magnetoelectric gravitation unit is connected with amalgamator and concentrate outlet is connected via hydroelectric classifier with electrostatic classifier.

EFFECT: higher efficiency.

4 cl, 1 dwg, 2 tbl