Verfahren zur Herstellung einer wässrigen Suspension hoher Konzentration

• Main Authors: LAGANA, VINCENZO, I-20133 MILANO, IT, DONATI, ELIO, I-61032 FANO (PE), IT, ERCOLANI, DARIO, I-61032 FANO (PE), IT
• Format: Patent
• Language: German
• Published: 04.08.1994
• Edition: 5
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; BLASTING; CHEMISTRY; COMBUSTION APPARATUS; COMBUSTION PROCESSES; FEEDING FUEL TO COMBUSTION APPARATUS; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; HEATING; LIGHTING; LIQUEFIED PETROLEUM GAS; LUBRICANTS; MECHANICAL ENGINEERING; METALLURGY; NATURAL GAS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; WEAPONS

A method is described for preparing a high-concentration solids suspension, in particular coal or petroleum coke, which can be transported by pipe and be burnt with low emission of harmful substances, comprising crushing the solid to be suspended to a maximum particle size of 6 mm and then grinding it in the presence of additives in aqueous solution to a maximum solid particle size of 300 mu m, the method being characterized by adding, either before the crushing or immediately before the grinding, a desulphurizer chosen from CaCO3, MgCO3 and dolomite, either alone or in mixture, in a molar ratio to the sulphur contained in the solid of between 1.5 and 3, and adding immediately before or during grinding a desulphurizer also possessing stabilizing and anticorrosive properties and chosen from MgO, Mg(OH)2, CaO and Ca(OH)2, either alone or in mixture, in a quantity of between 0.04 and 0.4% by weight of the final suspension.