Abstract:
Ein Formling mit den Hauptbestandteilen Kalkkomponente in Form von gebranntem Kalk, gebranntem Dolomit, Kalkstein und/oder Dolomitstein und Schwarzstoff in Form von Koks, Anthrazit und/oder Kohle und mit wenigstens einem als Brikettierhilfe wirksamen Hilfsstoff lässt sich stabil und einfach dadurch herstellen, dass die Kalkkomponente mit dem Schwarzstoff, der eine Norm-Partikelgröße zwischen 0 und 5 mm aufweist, sowie einem Zellulosefasermaterial zwischen 0,5 und 5 Gew.-% und einem Bindemittel mit einem Anteil zwischen 0,1 und 5 Gew.-% gemischt und anschließend zu dem Formling verpresst wird.
Abstract:
The invention relates to a method for the production of calcium carbide on an industrial scale in an electric low-shaft furnace using PVC-containing plastic waste. The invention is characterized by a) thermally decomposing the PVC-containing plastic waste in the temperature range of 250 to 500°C to form HCl gas and a carbonaceous residue and b) using the carbonaceous residue formed in step a) as a feed material in the production of calcium carbide.
Abstract:
The present invention relates to a method for producing precipitated calcium carbonate using fowl egg shells, such as chicken egg shells. More particularly, the method comprises: a heat treatment step of heating the egg shells; a grinding step of grinding the calcium oxide generated in the aforementioned heat-treatment step; a dry-quenching step of feeding the ground calcium oxide into a thermo-hygrostat in order to convert the ground calcium oxide into dried, powdered calcium hydroxide; a carbonizing step of mixing the dried, powdered calcium hydroxide prepared in the aforementioned dry-quenching step and an organic solvent, and feeding the carbon dioxide generated in the heat-treatment step into the mixture; and a filtering and drying step of filtering and drying the calcium carbonate prepared in the carbonizing step.
Abstract:
Disclosed is the use of residual matter and/or waste as useful materials in electric low-shaft furnaces, said residual matter and/or waste being utilized for heating and/or as a carbon source. The low-shaft furnace used generally comprises a cover as well as at least one hollow electrode for introducing the starting materials. The residual matter and/or waste can be trash, industrial residues, or organic residue and refuse that is difficult to dispose of, such as medicaments, electronic scrap, high-calorie materials, and/or materials that pose a health hazard and can be halogenated. Said residual matter and/or waste preferably has a maximum particle diameter of 100 mm and is introduced particularly in a compact or extruded form into the furnace bed via the hollow electrode. Up to 95 percent of the residual matter and/or waste are converted into pyrolysis gases at furnace temperatures ranging from 1700 to 2500 o C, and the obtained carbon is used as a carbon source, thus making it possible to significantly reduce the amount of energy required for producing calcium carbide, ferrosilicon, ferrochromium, etc.
Abstract:
Heterogeneous catalyst systems, methods of making these systems, and methods of using these systems, wherein catalytically active gold is deposited onto composite support media. The composite support media is formed by providing nanoporous material on at least a portion of the surfaces of carbonaceous host material. In representative embodiments, relatively fine, nanoporous guest particles are coated or otherwise provided on surfaces of relatively coarser activated carbon particles. Catalytically active gold may be deposited onto one or both of the guest or host materials either before or after the guest and host materials are combined to from the composite host material. PVD is the preferred catalyst system of depositing gold.
Abstract:
The invention relates to a method for the production of calcium carbide on an industrial scale in an electric low-shaft furnace using PVC-containing plastic waste. The invention is characterized by a) thermally decomposing the PVC-containing plastic waste in the temperature range of 250 to 500°C to form HCl gas and a carbonaceous residue and b) using the carbonaceous residue formed in step a) as a feed material in the production of calcium carbide.