Underwater immersion block and method to produce the same
AssigneeNKK Corporation
InventorsTatsuhito Takahashi, Tsuneo Isoo, Makoto Kato, Haruyoshi Tanabe
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Abstract
It is an object of the invention to effectively absorb and remove CO2 in an exhaust gas generated during an industrial process for reducing an amount of exhausting CO2 into the atmospheric air. The exhaust gas containing CO2 is blown into the agglomerate of solid particles containing CaO and/or Ca(OH)2 to contact CO2 to the agglomerate for fixing CO2 in the exhaust gas as CaCO3, thereby to reduce the CO2 concentration in the exhaust gas. Preferably, the solid particles contain water, and more preferably, the solid particles contain surface adhesive water.
Claims38
An underwater immersion block for rearing algae and water living creatures produced by a method comprising the steps of:
- (a) preparing a granular steel making slag mixture, said steel making slag mixture has a basicity in terms of a weight ratio of CaO to SiO2 of 1.5 or higher;
- and
- (b) producing a carbonate by carbonation of the mixture to agglomerate the mixture by using the carbonate as a binder,
- wherein the underwater immersion block has a porosity of 10 to 70%.
A method of producing an underwater immersion block for rearing algae and water living creatures, comprising the steps of:
- (a) preparing a granular steel making slag mixture, said steel making slag mixture has a basicity in terms of a weight ratio of CaO to SiO2 of 1.5 or higher;
- (b) forming a packed bed of the mixture, the packed bed having a bulk specific gravity/true specific gravity ratio of 0.3 to 0.9;
- and
- (c) carrying out a carbonation of the mixture in the packed bed to agglomerate the mixture.
Dependencies are inferred from the claim text.