Method of starting a plant for the production of pig iron or...

C - Chemistry – Metallurgy – 21 – B

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C21B 13/02 (2006.01) C21B 13/14 (2006.01)

Patent

CA 2061147

There is disclosed a method of starting a plant for the production of pig iron or steel pre-material including a direct-reduction shaft furnace and a meltdown gasifier. - At first the still empty meltdown gasifier is heated up by aid of a combustible gas and the smoke gases forming are introduced into the still empty direct-reduction shaft furnace. - Coke or a degassed coal product is charged into the direct-reduction shaft furnace and the smoke gases introduced into the direct-reduction shaft furnace are passed through the coke or the degassed coal product by releasing their sensible heat. - The coke or the degassed coal product thereby is heated to ignition temperature and is charged into the meltdown gasifier in the hot state, catching fire upon the injection of an oxygen-containing gas or of oxygen. - A further coal or coke bed serving for gasification is charged on the ignited bed of coke or degassed coal product and the charging substances are charged into the direct-reduction shaft furnace.

éthode de mise en marche d'une usine de production de fonte brute ou de matériau de base pour la production d'acier comprenant un four à cuve de fusion à réduction directe et un gazogène à fusion. D'abord, le gazogène vide est chauffé à l'aide d'un gaz combustible et les gaz de fumée produits sont introduits dans le four à cuve de fusion encore vide. Du coke ou un produit du charbon dégazé est chargé dans le four à cuve de fusion et les gaz de fumée introduits dans le four à cuve de fusion passent à travers la charge de coke ou de produit du charbon dégazé et libèrent leur chaleur sensible. Le coke ou le produit de charbon est ainsi amené au point d'inflammation et est chargé à l'état chaud dans le gazogène où il s'enflamme lors de l'injection d'un gaz contenant de l'oxygène ou lors de l'injection d'oxygène. Une autre charge de charbon ou une paillasse de coke destinée à la gazéification est chargée sur le coke ou le produit de charbon enflammé et les substances de chargement sont introduites dans le four à cuve de fusion à réduction directe.

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