Method for blowing substitute reducing agents into a blast furnace
AssigneeKüttner Holding GmbH & Co. KG
InventorsRobin Schott, Christian Bartels-Freiherr Varnbüler von und zu Hemmingen
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Abstract
The present invention relates to a method for pneumatically blowing a powdery substitute reducing agent in a dense flow process, by means of a transport gas, into a gasification reactor, or via a tuyere into a blast furnace. The substitute reducing agent is gasified in a gasification reaction. The transport gas comprises a fuel gas, the constituents of which or the oxidation constituents of which are at least partly involved in the gasification reaction.
Claims20
A method for pneumatically blowing a powdery substitute reducing agent in a dense flow process, in which a flow density of the powdery substitute reducing agent is 60% or more of the packing density in the bulk state, by means of a transport gas, into a reactor or via a tuyere into a blast furnace, so that the substitute reducing agent is gasified in a gasification reaction,
- wherein the transport gas comprises a fuel gas, which is carbon monoxide, hydrogen, water vapor, oxygen, hydrocarbon, furnace gas, natural gas, coke gas or coking plant gas, converter gas, another blast furnace gas, or a mixture thereof.
A method for pneumatically blowing a powdery substitute reducing agent in a dense flow process, in which a flow density of the powdery substitute reducing agent is 60% or more of the packing density in the bulk state, by means of a transport gas, into a reactor, or via a tuyere into a blast furnace, so that the substitute reducing agent is gasified in a gasification reaction,
- wherein the transport gas consists of a fuel gas, the components of which or their oxidation components at least partially participate in the gasification reaction, and of another gas or gas mixture than the fuel gas.
A method for pneumatically blowing a powdery substitute reducing agent in a dense flow process, in which a flow density of the powdery substitute reducing agent is 60% or more of the packing density in the bulk state, by means of a transport gas, into a reactor or via a tuyere into a blast furnace, so that the substitute reducing agent is gasified in a gasification reaction,
- wherein the substitute reducing agent with the transport gas is blown in through a first injection lance,
- wherein in addition to the substitute reducing agent and transport gas, oxygen is also supplied to the reactor through the first injection lance and is combined with the substitute reducing agent and transport gas in an opening region of the first injection lance,
- wherein the first injection lance has an inner first pipe and a second pipe arranged around the inner first pipe, whereby a ring gap surrounding the first pipe is formed between the first and second pipes, wherein the substitute reducing agent and the transport gas are conducted through the first pipe and the oxygen is conducted through the ring gap, and
- wherein the transport gas comprises a fuel gas, the components of which or their oxidation components participate at least partially in the gasification reaction.
Dependencies are inferred from the claim text.