US854527A - Process of preparing and reducing ores. - Google Patents

Description

' exact description [UNITED STATES PATE T- FFICE,-

' EMIL POLLACSEK, OF NEW YORK,'N. Y.

PROCESS OF PREPARING AND REDUCING ORES.

' na asese'r.

Specification of Letters Patent.

. Patented-May 21, 1907. 1

Application filed October 18, 1904. Serial No. 229,042.

Tc q ZZ-J uitom it) maycancer n:

Be it known that I, EMInPoLLAosEK, a

subject of the Kingof Hungary, and a resident of New. York, borou h of Manhattan, county and State of New ork, have invent ed certain new and useful Improvements in Processes of Preparing and Reducing (lres,v of which the following is a full, clear, and

This invention relates to the preparation and reduction of ores, and has particular application to an improved'process of preparing resultant metal'depending" largely upon the ffurnace,

"cpliantity and nature of the components ofe mixture when first introduced into the With the above recited objects and others of a similar-nature'in view, my invention consists in the improved process and the.

product hereinafter claimed.

- In the practice of my invention I employ either what is commonly termed iron ore- 'dust,. or ore in its native rocky state, and in the latter case the ore is crushed until the agent; agents are preferably adde in particles are reduced to anular form, and to the bulk I add, by mixing, certain basicagents such as lime, magnesia, orflboth, "in sufficient quantities to unite with the silicates, phosphorus and phosphoric acid of the'" .ore', for thepur ose of forming salts thereof and acting as t efluxin'g The basic uantlties in excess ofthe amounts theoretica y required, in order to produce a re id fusing and silicate ing and to retard the li eration of the phosphorus and similar agents, thus preven g the latter combining with the metal in'the.

form of protoxids' and detrimentally affecting the smelting of the ores. ,It is also desirable to employ a surplus quantity of basic agents to act in conjunction with the small quantity of scrap iron, or iron shavings (used for the purpose hereinafter mentioned) to cause the formation of ferric hydrate-Te (0H),, when water is added to the com pound, or mass, in the presence of air. Fi-

' have found that for the vention a material manu V pulp is preferable. This may be obtained in nally the basic agents should be present in the compound in such quantity as I to efiect a thorough reductionv of the ore when the v blast furnace.

To the mixture of fine ore and the basic agent, I add a quantity of the abovementioned iron shavings or scrap iron, thus increasing the percentage ofpure iron in the mass, and causing the formation of the'ferric hydrate (when water is present) which performs the function of "a binding agent'and causes 'the mass to harden without having recourse to pressure to accomplish such hardening. The term iron in this connection is used in its ordinary senseincluding steel and c There 7 is then added to the mass or composition a the various other forms of the metal.

suitable reducing agent such as charcoal, coke, coal or wood dust, in such proportions as maybe found desirable for carbonating and for the reduction of oxids.

The 'compound is then supplied with water in which a glue-like substance of organic nature has been dissolved. While this lue-like substance may be of any desire character, I fpurposes of my inactured from Wood various ways; for instance, by subjecting the wood pulp to pressure for the urpose of obtaining an extract which has the. ualities of of adhesiveness and coherence, w 'le at the same time it yields 'a relatively large per-v centage of carbon during the smelting operation. During-the processof obtaining the extract there is added to the latter a suitable basic agent and, acids for the purpose of neutralization.

.- The. water containing the glue-like substance is added to the dry mixture of ore, basic agents, scrap iron, and reducing agent,

in sufiicient quantities to give to the mass a plastic consistency, the formation of the ferric hydrate occurring upon the addition of the fluid. In such plastic state the composition is introduced into the blast furnace,

the presence of the water preventing the mass drying too-quickly and cracking or crumbling when exposed to the furnace heat. The gluelike material disintegrates in the furnace and leaves a solid residue which forms an incrus tation, thus further hardening the mass. In

the highest smelting zone in the furnace this residue is freed of a relatively large quantity of carbon which combines with the fused 'metal. The hardening of the mass should pzising an. iron-containin qbody, a, basic egent,'a.reduc1ngagei1t an abmder contam 1 5 "xsisti'ng of iron ore, a basic agent, a reducln'g carbonic acid gas; and when the take piaceslowiy in order to prevent crumbiing and disintegration throng-h the escape mass is ex;- posed to a high temperature only a crust or shell should be formed.- The surplusv of basic agents serves as a, fiuxing agent durin the finalisteps in the smeiting'process, an is chawnioff res slag, along with the silicates front the metal.

Wi zit I claim is 15;: The-herein. described composition com- .ing'e luelike inateriali 2. he herein-'gdescribed composition fcon-- agent and water'containing 'a gl uelike materielvof organicprigm; 4 A. i rocessjof preparing orefor -,reduct on,

t of an iron-containing which consists in mixing suitable proportions v body, a basic agent, a reducing agent, and introducing to the mass a fluid containing a gluelike substance for the pnrposeof giving the mass a plastic consistency. and combining together the components of such mass I o 4. A process of preparing ore-for reduction and smelting which consists in mixing suit- .able proportions of an iron-containing body. abasic agent, a'reducing agent, and a fluid containing a 'gluelikemateriel.

In testimony whereof I have name to this specification in the two subscifibing'witnesses.

- EMIL POLLACSEK.

signed my presence of