Filter system and method for collecting solid mineral grains from lean-phase superfine mineral suspension liquid

Abstract

The invention belongs to the technical field of solid-liquid separation and particularly relates to a filter system and method for collecting solid mineral grains from a lean-phase superfine mineral suspension liquid. The filter system disclosed by the invention comprises n filters (1), matched delivery pumps (21) and pipe fitting valves, wherein cylinders of the filters are made of plastic, and filter elements (5) are PVC (polyvinyl chloride) sinter filter elements with apertures smaller than 1 micron; corresponding control valves are respectively arranged on matched pipelines, and the filtering separation is controlled by combining a preset filtration time with the saturated filtration pressure in an operation process. As the filter system and the method are utilized for collecting the solid mineral grains from the lean-phase superfine mineral suspension liquid, the mineral recovery rate is improved, and the production efficiency is greatly increased; by controlling the filtering separation operation, the complete regeneration of a filter device is guaranteed; the device is low in manufacturing cost and long in service life and is light, convenient and durable; by utilizing a detachable structure, the filter system is easy to dismount and mount and convenient to maintain.

Description

technical field [0001] The invention relates to the technical field of solid-liquid separation, in particular to a filtration system and a method for collecting solid mineral particles from dilute-phase ultrafine mineral suspensions. Background technique [0002] In fields such as chemical industry and metallurgy, solid-liquid separation operations are often required. Theoretically, the suspension of solid particle materials, that is, raw water, can be obtained by solid-liquid separation operations such as plate and frame filtration, belt vacuum filtration, centrifugal separation and filtration, and clear liquid phase filtrate, that is, clean water; but in the actual production process, especially in mineral During the processing, due to the requirements of the upstream operation of solid-liquid separation, such as chemical leaching, flotation and other process conditions, mineral particles are often crushed to ultra-fine micron-sized particle sizes. When performing solid-li...

AI Technical Summary

Problems solved by technology

[0011] The method of CN102728121A is adopted to effectively solve the disadvantages that the aforementioned filtering equipment with a filter core is easy to block due to the fixed pores of the filter core when performing solid-liquid separation operation. When the fiber bundle needs to be fixed with a perforated hard tube, the binding belt and stainless steel spring need to be pulled repeatedly during backwashing. The spring itself needs to be replaced or cleaned regularly, which affects the service life

[0012] In addition, in the above-mentioned disclosed technologies, the cylinder body of the filter equipment is made of metal materials such as cast steel, carbon steel or stainless steel without exception, and the filter medium is either a bag filter or a metal or ceramic filter element, while in industrial practice , the liquid phase that needs to be separated often contains chemical solvents, acids and bases and other corrosive components such as hydrofluoric acid and chloride ions. In this way, the use of metal filter equipment for filtration and separation operations is subject to application restrictions or reduced service life due to corrosion problems. Even It is also difficult to completely avoid corrosion when using stainless steel. At present, technicians deal with these problems by regularly coating the inside of the cylinder with an anti-corrosion layer or regularly replacing the cylinder or filter element.

Images