US1284094A - Manufacture of steel direct from iron ores. - Google Patents

Description

L. T. saumure. MANUFACTURE F STEEL DIRECT FROM IRON GRES. PPLICATION FILED AUG-4| |911.

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Patented NOV. 5, ww.

' `iNVE/wml, uis Zig/laf@ wow/5 all@ wmwm be less than that in the ordinary blast LUIS TEJJERO GROUSJELLE, UF GRENOBLE, FRANCE..

MNUFACTURE 0F STEIELVDIRJECT FROM '.llEtON DRES.

Specification of Letters Patent.

Patented Nov., 5, fait.

application tiled tugust t, 1917. Serial 1t o. ltte.

To aZZ whom it may concerm ,Y

lBe it known that ll, Luis Tirreno GaonsnLLii, a subject of the King of Spain, residing at Grenoble, France, 39 Rue Lesdiguirs, have invented certain new and useful lmproveinents in the Manufacture of Steel Direct from lfron Urss, of which the following is a specification.

` My invention relates to a furnace for producing steel direct from iron ores.

The objects ofmy invention are :e

(1) 'llo obtain the same reactions as inthe blast furnace, but without any contact with free carbon, in order that the operation, when completed, should produce steel, and not cast iron;

(2) rlhat the temperature should be as high as, if not higher than, that inthe ordinary blast furnace;

(3) rlhat the consumption of fuel should nace.

lln the drawing,

Figure 1 is a vertical section of the apparatus, 4

Fig. 2 is an elevation ina plane at a right angle to Fig. l, half in section, and

Fig. 3 is a plan.

rllhe apparatus comprises a sort of blast furnace provided with a'hearth, the whole A of more or less great dimensions according ttl to the quantity of ore to be treated, the reducing and fusion functions being entirely separated and brought about by gases of different nature.

ln a refractory masonry body a Fig. l) surrounded by ordinary masonry al andentirely armored outsideis a chamber b into which projects a metal chamber c extended by a sleeve 01 ofrefractory material. The chamber c is charged with ore through a hopper (Z, the inlet door all and the outlet door e of which open alternately, the latter being opened by means of a lever with a balance weight 1" (Fig. 3), in order to prevent air from getting in, or caping, during the charging of the ore.

Through the pipe 'u is admitted hydrogen or hydrogenated gas (water gais, natural gas, etc.) generated separately, which circulates in the upward direction in the pipe w with internal radiation ribs, heated outside by the hot escaping gases of the furnace circulating 1n the downward direction in the gases from es flue w1, and enters through v1 the chamber c, in order to filter through the ore in the downward direction and escape throu h the annular space left between the cham ers c and c1, and through the chimney w1. t 'lhe ore reduced'n the chamber c, follows its path through 21 and arrives at the shaft or stack On arriving there, .it is heated by the large amount of heat Generated by the blow pipes of the twyers Z, lZ, Z, etc., supplied with nonhydrogenated gases generated separately, and with air admitted through the orifice p; this air is heated by the waste heat owing to its circulation in the coil s; the air is admitted cold at p and escapes hot at yin order to. pass to the collector mm which distributes it to the twyers 0. As regards the non-hydrogenated gas (for fusion), it is admitted at w, passes to the collector n a which also distributes it to the twyers o.

The hearth j having received sufficient molten metal, the casting is e'ected through a.

The gases coming from the twyers Z, Z, Z, etc., circulate in the fusion chamber j and pass through 7c and c' to the chimney after having filtered through the reduced ore.. rllhe draft of this apparatus is by compression, as between the gasproducing apparatus and the furnace are arranged fans, forcing gases into the furnace.

The gas producers can thus work freely, and their cleaning and manipulation are facilitated.

llt goes without saying that the production of the gases, the admission of the air and the temperature are regulated by valves of the twyers, and by the more or less great admission of hydrogen or of reducing gas into 4the reducing chamber.

This being clearly understood, it will be 4 seen that the apparatus thus arranged complies with all the conditions which are: (1) 'lo effect reduction by hydrogen or by ,a hydrogenated and oxycarbonated or `hydrocarbureted gas, without having to fear the reverse reaction of the resulting water on the metal produced.

(2) '.lo carburet the iron obtained, .without converting it into cast iron, since the carbureting carbon, and not by carbon, the reduction is brought about by oxd of` taking place Without cont-act with the latter, the reducing gases as Well as the fusion gases being produced separately.

(3) To'work with an enormous economy of fuel, this being due to the process and to the use of the waste heat for heating the combustion air and the reducing gases.

(41) To offer the advantage of enabling iron ore to be treated which contains impurities which render it useless for treatment by the usual processes, and any fuel to be used.

(5) To arrange a fusion and a purication chamber which offers all the necessary conditions for insuring fusion and purication of the steel obtained.

(6) To Work by suction and compression, which facilitates the manipulation of the furnace and `of the gas producers, the Whole being translated into'a. guarantee of uninterrupted Working.

l/Vhat I claim as my invention and desire to secure by Letters Patent is 1. .In a furnace for producing steel direct from iron ores, a reducing chamber, means for introducing reducing gas therein, a melting chamber, independent means for introducing heating gases into said melting chamber, and an exit passage way for the Waste gases independently connected with the reducing and melting chambers.

2. In a furnace for producing steel direct from iron ores, an upstanding stack, a reducing chamber extending longitudinally Within the stack and spaced laterally therefrom for providing a gas outlet passage, means for introducing iron ore into the upper end of the reducing chamber, means for introducing a reducing gas into the upper end' of the reducing chamber, a tubular member arranged beneath and spaced from the lower end of the reducing chamber so that said lower end has communication with said gas outlet passage, said tubular member being spaced laterally from said stack to provide a second gas passage, a melting chamber arranged beneath the tubular member and discharging its gases into the second gas passage, and separate means for supplying heated gases to the melting chamber.

In testimony whereof I aiix my signature in presence of two witnesses.

LUIS TEJERO GROUSELLE. Witnesses:

GEORGE CONSTANT, ALFRED MIRALL.

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