CS248129B1

CS248129B1 - Charge for FerroSilicochr &

Info

Publication number: CS248129B1
Application number: CS896983A
Authority: CS
Inventors: Arnost Borak
Original assignee: Arnost Borak
Priority date: 1983-12-01
Filing date: 1983-12-01
Publication date: 1987-01-15

Abstract

Podstatou riešenia je, že ferosilikochróm sa získává zo vsádzky zloženej z uvedenej chrómovej rudy a ferochrómu uhlíkatého s obsahom 50 až 73 % hmot. chrómu a ktorých poměr vo vsádzke je 1: 0,1 až 0,5 dielov hmot.The essence of the solution is that ferrosilicochrome is obtained from a charge composed of the mentioned chrome ore and carbon ferrochrome with a content of 50 to 73% by mass. of chromium and whose ratio in the batch is 1: 0.1 to 0.5 parts by mass.

Description

Vynález sa týká vsádzky pre výrobu ferosilikrochrómu. V súčasnosti sú známe dva spósoby výroby tejto zliatiny — jednostupňový a dvojstupňový. U prvého spósobu sa v jednom stupni získá požadovaná zliatina tak, že křemík a chróm sa vyredukuje priamo z kremenca a chrómovej rudy. Pre tento· postup výroby nie sú vhodné chrómové rudy s vyšším obsahom kysličníka horečnatého, t. j. nad 15 % hmot. U dvojstupňového sposobu sa najprv v prvom stupni získá ferochróm uhlíkatý, ktorý v druhom stupni sa přidává do vsádzky, aby sa získala požadovaná zliatina, pričom ferochróm uhlíkatý je jediným nositelom chrómu. Tento postup je používaný v oblastiach, kde sú k dispozícii chrómové rudy s vyšším obsahom kysličníka horečnatého.The present invention relates to a charge for the production of ferro-silicrochrome. There are currently two ways of producing this alloy - one-stage and two-stage. In the first method, the desired alloy is obtained in such a way that the silicon and chromium are reduced directly from the quartzite and the chrome ore. Chromium ores with a higher magnesium oxide content, i.e. above 15% by weight, are not suitable for this production process. In the two-stage process, the first step is to obtain a carbon-containing ferro-chromium which is added to the charge in the second stage to obtain the desired alloy, with the carbon-containing ferro-chromium being the only chromium carrier. This procedure is used in areas where chromium ores with a higher magnesium oxide content are available.

Uvedené nedostatky sú odstránené vsádzkou pre výrobu ferosilikochrómu podlá vynálezu, zloženej z chrómovej rudy a ferochrómu uhlíkatého, ktorých poměr vo vsádzke je 1: 0,1 až 0,5 dielov hmotnostných, pričom chrómová ruda obsahuje viac ako 15 percent hmot. kysličníka horečnatého a ferochróm uhlíkatý 50 až 73 % hmot. chrómu.These drawbacks are eliminated by the inventive ferro-silicochrome composition consisting of a chromium ore and a carbon ferro-chromium having a batch ratio of 1: 0.1 to 0.5 parts by weight, with a chromium ore content of more than 15 percent by weight. magnesium oxide and ferro-chromium carbonate 50 to 73 wt. chromium.

Vsádzka podlá vynálezu využívá výhodyThe charge of the invention utilizes advantages

Claims

SUBSTITUTE A charge for the production of ferro-silicochrome, characterized in that it consists of a chromium ore with a magnesium oxide content of more than 15% by weight. and the ferro-chromium of the carbonate and the processes used, this being mainly possible where chromium ores with a higher magnesium oxide content are available. The main advantage is the higher use of chromium without the need for higher energy intensity when using it for the production of refining ferochrome and overall higher efficiency of production of refining ferochrome. It allows to obtain a semi-finished product in a wide range of chemical composition for carbon, silicon, and chromium content for further use in the production of refining ferochromes and also as a deoxidizing alloying additive in steel making. Example of batch composition for the production of ferro-silicochrome with an average composition: 44 wt. Si, 37 wt. The Cr. kg quartzite 300 albanian chrome ore 165 ferro-chromium carbon 40 coke pea 70 stone coal 110 wood chips 60 bauxite 25 iron chips 25 YNALEZU with a content of 50 to 73 wt. % of chromium, the ratio of these batch components being in the range of 1: 0.1 to 0.5 parts by weight.