Mechanothermal activation method of raw desufating sludge

• Main Authors: MALÍKOVÁ PETRA, DAXNER JAROMÍR, VÁCLAVÍK VOJT CH
• Format: Patent
• Language: Czech; English
• Published: 03.12.2014
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, ORTHE LIKE; FIXED CONSTRUCTIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR; METALLURGY; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF NATURAL STONE; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

Způsob mechanotermické aktivace surového desulfatačního kalu spočívá v tom, že surový desulfatační kal se nejprve vysuší při teplotě do 200 .degree.C, kdy se odstraní volně vázaná voda, dále se předehřívá v teplotním pásmu 200 až 800 .degree.C, následně se termicky upraví v rozsahu teplot 900 až 1250 .degree.C, při běžném atmosférickém tlaku, a to po dobu 30 až 60 minut, načež se termicky aktivovaný desulfatační kal zchladí na teplotu 800.+-.50 .degree.C a následně se dochladí až po teplotu okolního prostředí, načež se rozdrtí a rozemele na měrný povrch minimálně 2000.+-.100 cm.sup.2.n./g. The mechanothermal activation method of raw desulfating sludge, according to the present invention is characterized in that raw desufating sludge is first dried at a temperature up to 200 degC, in order to remove freely bound water, subsequent it is preheated at a temperature ranging from 200 to 800 degC followed by heat treatment at a temperature ranging from 900 to 1250 degC, at ambient atmospheric pressure for a period of 30 to 60 minutes, whereupon the so thermally activated desulfating sludge is cooled down to a temperature of 800 +/- 50 degC followed by aftercooling to the ambient temperature. Then, the sludge is crushed and ground to a specific surface of at least 2000 +/- 100 cme2/g.