Method and device for granulating and comminuting liquid slags
Assignee"Holderbank" Financiere Glarus AG
InventorAlfred Edlinger
Life of this patent
Estimating the term…
Abstract
In a method for granulating and comminuting liquid slags, especially metal-oxide-containing slags, coal, hydrocarbons, carbon dioxide (CO2) and/or coal/water mixtures or coal slurries are driven into the slag or the slag jet. The liquid slag is transferred into an expansion and granulation chamber and subsequently into a mill, especially a jet or impact mill. In the device for carrying out the method provided with a slag tundish and a lance arranged coaxially to the axis of the tundish tube the tundish tube is designed as a hole-type nozzle. Devices for applying carbon carriers and/or water nozzles are arranged radially outside of the mouth of the tundish tube.
Claims22
A method for granulating and comminuting slag containing metal oxides, said method comprising:
- injecting the slag into an expansion chamber or granulating chamber, the slag being in a form selected from the group consisting of a liquid slag and a slag jet;
- passing into the slag a coal slurry or at least one member selected from the group consisting of coal, hydrocarbons, CO2-containing gases, and mixtures comprising coal and water, and converting at least part of said coal slurry or at least one member into CO and H2 while forming slag droplets and reducing and cooling the slag droplets to thereby obtain a granulated slag;
- processing the granulated slag to form a dust mixture comprising clinker dust, slag dust, and metal dust;
- and
- separating the clinker dust, slag dust, and metal dust from each other.
A device for carrying out the granulation and comminuting of slag containing metal oxides, said device comprising:
- a slag tundish tube designed as a hole-type nozzle and having a mouth and either an expansion chamber or a granulation chamber;
- a lance arranged coaxially with the slag tundish for generating a liquid slag or slag jet, and for injecting the liquid slag or slag jet through the mouth and into either the expansion chamber or the granulation chamber of the slag tundish tube;
- and
- a radial injector arranged radially outside of the mouth of the tundish tube, said radial injector comprising water nozzles and/or means for applying carbon carriers, said radial injector passing into the slag a coal slurry or at least one member selected from the group consisting of coal, hydrocarbons, CO2-containing gases, and mixtures comprising coal and water and converting at least part of the coal slurry or at least one member into CO and H2 while forming slag droplets and reducing and cooling the slag droplets to thereby obtain a granulated slag.
Dependencies are inferred from the claim text.