Title: Method of maintaining steady coal-water slurry
Application Number: 87101684 Application Date: 1987.03.05
Publication Number: 1016794 Publication Date: 1988.03.02
Approval Pub. Date: 1993.03.03 Granted Pub. Date: 1993.03.03
International Classifi-cation: C10L1/32
Applicant(s) Name: Hitachi Ltd. Address:
Inventor(s) Name: Hideo Kikuike;Kiyoshi Muranaka;Takaichi Kaji
Attorney & Agent: FAN BENGUO
Abstract:
    This invention relates to a method of maintaining the viscosity of the slurry low and stable without deteriorating the properties thereof during the storage over a long period of time by adding alkali metal silicate and/or carbonate capable of forming a water insoluble compound with ions of calcium and/or magnesium to the slurry. The amount of the alkali metal silicate and/or carbonate should be sufficient to maintain the concentration of the ions to a predetermined level by converting the ions to the insoluble compound, and controlled by detecting dissolved ions of calcium and/or magnesium in the supernatant of the slurry, continuously or intermittently.
Time: 9