US933357A - Metallurgic process to produce metals or steels of all qualities. - Google Patents

Description

in co'ntact'wi'th the melted metal to be treat- Oxid of nickel 1. 225 Lime .T 056 Magnesia 1 040 Sodium carbonate 106 1. 697 40 2. Carborundum amorphous or crys- I talline 400 Green oxid' of chromium .760 Lime ....1 .056

v Magnesia 040 Sodium carbonate 106 a 3. Carborundum amorphous or crystalline 400 Manganese dioxid 1. 740 Lime 056 Magnesia 04:0 Sodium carbonate 106 UNIT D sTArEsrarENT OFFICE.

LOUIS HIIPPOLYTE BARADUC-MIILLER, OF PARIS, FRANCE.

METALLURGIQPROCESS TO PRODUCE METALS OR STEELS OF ALL QUALITIES.

No Drawing.

To all whom 'Lt'may concern:

Be it known that I, LOUIS HIrroLY'rE BAItADUQ-ll'lULLER, of Paris, France, have invented a new and useful Metallurgic Process' to Produce Metals or Steels of all Qualis ties, which invention is fully set forth in the following specification.

This invention relates to a process of purifying metals and imparting thereto special properties, and more particularly to the pro duction of steels of all qualities.

To this end the process consists in forming ed the metals or alloys'which will have for effect to purify or give to the melted metal the qualities required.

For the purpose of this invention, I use small bricks or blocks formed with mixtures of metallic oxids and siloxycon 'or metallic ox'ids and silicium carbid amorphous or crystalline (carborundum) or metallic oxids and carbo-silicium which I add at the time requiredto the molten metal.

Among the mixtures suitable for the purposeof this invention, the following are given by way of example, the parts being taken by Weight. For further details, reference may be had to my French Patent No. 361,950, dated Nov. 29th, 1905, and first certific7ate of addition No. 7216, of Jan. 23, 190

1. Oxycarbid of silicium siloxycon) 270 When these compositions are heated to an i Specification of Letters Patent.

Applicatipn filed June 29, 1908. Serial No. 441,045.

elevated temperature such as that attained in a combustion furnace or in an electric furnace, a metal, an alloy or a silicid results, depending on the nature of the composition;

In the example first given, in which oxycar-.

" have a density varying from about 2.05 to 2.6-5 while that of the metallic bath to which they are added is much higher and ranges from 7.1- to 8.9 according to the metal present, thereby enabling them to float in baths such as of'copper, bronze, cast iron, steel and the like, or on the dross, while retaining their shape and quickly attaining the tem-- perature requisite for thesiloxycon, carbid of silicium or carbo-silicium (Si C) to react on the metallic oxids and produce the desired metal, alloy or metallic silicid. The densityof each of the last-named bodies when at a high temperature is greater than the brick from which it is produced, and

sinks into contact with the metallic bath into which it rapidly enters especially when the bath is stirred to facilitate its dissemination. ,In proportion as the reaction goes on, the bricks wear out little by little, in a space of time relativelyshort. The reactions between the metallic oxids and the siloxycon or silicc ium carbid or carbo-silicium in the bricks effected by the heat of the bath ield nearly Patented Sept. 7, 1909. i

theoretic results, enabling meta s, alloys or steels to be produced of definite composition,

while avoiding an extra smelting operation of the bricks to-obtain the metal, alloy or silicid for the bath of metal.

The bricks above referred to I preferably prepare in the following manner: I grind together or separately and in fine powder the ingredients of the'mixture for making the brick, and when I have to deal with a superoxid of a metal, I add-a proportional quantity of carbonaceous material, such as coal in fine powder, then add in -fine powder 10 to 25% of clay or preferably clay-marl melting at about 1200 C. In case the ingredients are ground separately, I

weigh out the proportions of each Wanted,

then mix them thoroughly well dry in any suitable mixing apparatus. \Vhen the mixture is homogeneous, water, containing 1} to 1} of its weight, according to the case, of neutral silicate of soda at 42 Baum. moistenedin a homogeneous manner, is granulated while fresh through a sieve having large meshes and formed in molds into bricks under a pressure of about 350 kilograms per square centimeter. When the v bricks are taken out of the mold, they are dried in the open air or by artificial heat.

* The brickswhen dried are sufficiently resista well all variations of sudden changes in #ing and hard to be handled and transported without breaking. To make them extremely hard, they may be baked like building bricks to a temperature of 1000 C. at the most. the bricks may be agglomerated with magnesia and magnesiumcchlorid in solution, or with a small quantity of cement or like material. The bricks thus worked bear very consisting inadding to a molten bath of I add 5 to 10% of The mixture being metal which is to be refined or alloyed a composition containing a compound of carbon and silicium, the oxid of a metal or metals and a flux in the form of a brick capable of floating on the bath, said ingredients reacting at the temperature of the bath to produce a product acting to refine or alloy with i said bath. 7

2. A process of the character described, consisting in adding to a molten bath of metal which is to be refined or alloyed a composition containing carbid of silicium, an oxid of a metal or metals and a flux in the form of a brick capable of floating on the bath, said ingredients reacting atthe temperature of the bath to reduce a product acting to refine or alloy with said bath.

3. A process of the \character described,

consisting in adding to a molten bath of metal which is to be refined or alloyed a composition containing oxycarbid of silicium, an oxid of a metal or metals, and a flux in the form of a brick capable of floating on the bath, said in redients reacting at the temperature of the ath to produce a prolduct acting to refine or alloy with said bat In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

LOUIS, lnrrotrrr BARADUC-MULLER.'

Witnesses:

DEAN B. Mason,

GABRmL BELLIARD.