US1549828A - Process for producing transportable and workable shapes from iron alloys - Google Patents

Description

" agent used being 7 ment. Further advice given in the said ap- "Patented Aug. 18, 1925.

RATENT OFFlQE.

"FRITZ GREINER, F STUTTGART-GANNSTATT, GERMANY.

' No Drawing, I

' To all whom it may concern: q

Be it known that I, Fnrrz Gnnmnn', citizen of Germany, residing V at Stuttgart-Cannstatt, Germany, have invented new and useb ful lmprovements in Processes for Producing' Transportable and Workable Shapes from'Iron Alloys, of which the following is v r a specification.

-In-my copending application Serial No.

10 441,819 filed Feb. 2nd 1920 a process is described-for protectingiron alloys containing a high; percentage of silicon, manganese,

v phosphorus" or the like against burning while "beingmelted in a metallurgical furnace, this '1" process consisting in' enveloping the alloy, Qin the form of fragments or powder, in a fire-re'sistin coating prior to the introduc- 1 tion thereo ,into'the furnace, the said coat-' ing' preferably consistin omen-t. In this process t e fragmentary or of Portland cepowdery alloy could be made up in pieces or shapes, sue as briquettes, by means of the binding agent employed and then introduced in this form into-the furnace, the binding preferably, Portland ceplication is to the efi'ect that any large parts that might be present in the alloy to be treated s ould be first reduced to the size of .30 hazelnuts and then dealt with in the manner described, together with the smaller fragments, if any such be present.

It has now been found that this processis not only applicable to the protection of alloys of iron with silicon, manganese or phosphorus, but may also be advantageously .used in protectingall iron alloys which contain in addition to iron or one of the said substancesand in which carbon may 40 or may not be resent-further elements or com onents suo as nickel, cobalt, tungsten, and oron. The process is not only applicable to the rotection of pieces or sha es which contam elements or components t at merely mix with the particular alloy, but

' is also applicable to the protectionof pieces or shapes, which contain elements or components, that in addition to merely forming a constituent part of the alloy, are intended to initiate or effect some kind of chemical transformation, as for example thermite, alkalis etc. If, in the case of such admixwhich are intended to efiect a chemical transformation, the substances dealt with a rnooriss ronrnonuorne rnensronrnrnn Ann WORKABLE snnrns mom rm v a armors,

' Application an August so, 1921. Serial in. 496,978.

are such that they would be decomposed or dlssolved. by water, they must be enclosed in envelopes or shells which are capable of resisting the moisture to which theyare subected during the making up of the pieces or shapes, and which consist of a material that IS not derogatory to the purpose aimed at.

Such shells are for example: sheet metalcans, wooden boxes, coatings of varnish or the like.

, If it should be considered preferable to first disintegrate the alloys for the purpose of producing the pieces or shapes this disintegration should preferably be effected not by blows. or by grinding, but by granulating the redhot molten alloy in a known manner, as by means of revolving drums or disks.-

The above described modification of the process under discussion is capable of a.

much wider application than the original process, because the advantages accruing from protectingtor binding with cement can thereby be extended to any mixture or alloy containing iron or silicon in any form.

' Examples. 7

1. 150 kgs. of an alloy of 90% of iron and 10% ofnickel are reduced to fragments of the size of. hazelnuts and mixed with 30 kgs. of Portland cement and 20 kgs. of water and made up, by the procedure adopted in producing molded concrete blocks, lIlllO pieces or shapes each weighin about 3 kgs. in a dry state, the form 1m arted to the pieces or shapes being preierab y that of short cylinders so, as to make them easy to handle.- These packages may be he t for any length of time and use for iron alloys containing little nickel.

2. 150 kgs. of cast'iron is granulated in a red hot molten condition by allowing it to flow onto rapidly rotating disks. 3 gs. of ordinary carbonate of soda is portioned out into 30 sheets metal cans or boxes containing 100 grams each. The 150 kgs. of iron with 25 kgs. of Portland cement and 20 kgs. of water is then molded or made up into 30 pieces or sha es into each of which one of the cans or oxes having 100 grams of soda therein is introducedso that each package contains 5 kgs.- of iron and 100 grams soda. Such packages Ina also be kept for, any length of tune an may be used for carrying out certain metallurre ucinggical transformations in which the presence of alkali is necessary.

I do not claim broadly the method of producing pieces or shapes whose essential substance or substances protected against the action of the water.

2. The process for producing transportable and workable shapes from metallic alloys containing iron, which consists in reducing the coarse-pieces of said metallic alloy to fragments of about the size of hazelnuts, mixing these fragments with the smaller pieces of said metallic alloy, mixing the said fragmentary and smaller pieces of said metallic alloy with a refractory binding agent and forming the entire mixture into blocks.

3. The process for producing transportable and workable shapes from metallic alloys containing iron, which consists in re ducing the coarse pieces of said .metallic alloy into granules by any known granulating process; mixing these granules with a maasee refractory binding agent and forming the entire mixture into blocks.

4. The process of producing masses from metallic alloys containing iron, which consists in mixing suitably sized pieces of said metallic alloy with a binding agent which will not be affected by temperatures less than the melting temperature, and shaping the resulting mixture into blocks of suitable size.

5. The process of producing masses from metallic alloys containing iron, which consists in granulating the coarser pieces of said metallic alloy, mixing the granulated alloy with the finer pieces thereof, mixing the granulated and finer pieces of said alloy with a refractory binding agent which will not be affected by temperatures less than the melting temperature, and shaping the resulting mixture into blocks of suitable size.

6. The method of producing masses from metallic alloys containing iron, which consists in mixing pieces of said metallic alloy of suitable size with a refractory binding agent and water, and introducing into the mixture additional substance or substances enclosed within a protecting enclosure or envelope capable of protecting said substance from the action of the water.

In testimony whereof I have signed my name to this specification. v

FRITZ GREINER.