초록 ▼

A method and a system for preparation of a highly concentrated and fine-grained suspension such as a coal-water slurry comprises feeding of coarse solid matter by a metering conveyor type weigher and of a carrier liquid and additives into a ball mill, in which the solid matter is ground and the susp

A method and a system for preparation of a highly concentrated and fine-grained suspension such as a coal-water slurry comprises feeding of coarse solid matter by a metering conveyor type weigher and of a carrier liquid and additives into a ball mill, in which the solid matter is ground and the suspension is formed. The particle size and distribution are analyzed and the viscosity is determined. The speed of the ball mill and the amounts of the carrier liquid and additives are adjusted during the continuous preparation process so that a suspension with constant characteristic features such as particle size and distribution, content of solid matter and viscosity is supplied into a pipeline.

대표청구항 ▼

A method for the continuous production of a substantially constant efflux of a highly concentrated mineral slurry comprising a finely ground mineral material, a liquid and at least one additive, said mineral slurry having a substantially constant viscosity, a substantially constant ratio of dry weig

A method for the continuous production of a substantially constant efflux of a highly concentrated mineral slurry comprising a finely ground mineral material, a liquid and at least one additive, said mineral slurry having a substantially constant viscosity, a substantially constant ratio of dry weight of said mineral material to total liquid, and a minimal variance of particle size distribution of said finely ground mineral material, said efflux of mineral slurry supplying a substantially constant dry weight of said mineral material per unit of time, said method comprising the steps of: (a) providing a first flow comprising said mineral material in a coarsely ground state and said liquid, said first flow having a substantially constant ratio of equivalent dry weight of said mineral material to total liquid, said step of providing said first flow comprising the substeps of: (1) providing a stream of said mineral material in said coarsely ground state; (2) continuously determining the moisture content of said stream of said mineral material; (3) providing a stream of said liquid; and (4) adjusting the flow rate of said stream of said liquid according to said continuously determined moisture content; (b) providing a variable second flow of said at least one additive; (c) combining said first and second flows and simultaneously mixing and comminuting said resulting combined flow to produce said mineral slurry; (d) determining the viscosity of said so produced mineral slurry; and (e) adjusting said second flow of said at least one additive to maintain said viscosity of said mineral slurry substantially constant.