US221649A - Improvement in treating furnace-slag to convert the same into tiles, slabs - Google Patents
Improvement in treating furnace-slag to convert the same into tiles, slabs Download PDFInfo
- Publication number
- US221649A US221649A US221649DA US221649A US 221649 A US221649 A US 221649A US 221649D A US221649D A US 221649DA US 221649 A US221649 A US 221649A
- Authority
- US
- United States
- Prior art keywords
- slag
- slabs
- tiles
- convert
- improvement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002893 slag Substances 0.000 title description 13
- 241000876852 Scorias Species 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- RJKFOVLPORLFTN-LEKSSAKUSA-N Progesterone Chemical compound C1CC2=CC(=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H](C(=O)C)[C@@]1(C)CC2 RJKFOVLPORLFTN-LEKSSAKUSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
Definitions
- My invention relates to the utilizing of fur- .nace slag or scoria by converting it-into tiles,
- the furnace or kiln is heated before the charging operation, after which the air must be excluded by a proper lutin g of all apertures, the supply of fuel to the kiln being then discontinued.
- the tiles, blocks, or slabs are permitted to remain in the closed furnace or kiln for a length of time (ordinarily from four to sixhours) which may depend upon the size of the tiles or slabs and upon. the character of the slag used.
- the slag by this process of tempering loses its brittle properties, and becomes so hard and compact thatthe tiles, slabs, or blocks can be used to advantage in the making of durable pavements, and for many other purposes.
- the inflammable waste gases of blast-furnaces may be utilized in heating the furnaces or kilns.
- the tile, slab, or block When the molds are heated prior to receiving the molten slag, the tile, slab, or block will have the above characteristics throughout; but the use of chilled molds will result in the production of tiles or slabs with vitreous coatings, and these may be used to advantage in the building of sewers and for other purposes.
- the mode described of treating the slag or scoria of furnaces consisting in first casting the molten slag in suitable molds for tiles, slabs, blocks, and other objects, and then removing the latter from the molds, and, while they are still hot, subjecting them to a greater heat in a closed furnace, all substantially as set forth.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
- Furnace Details (AREA)
- Compositions Of Oxide Ceramics (AREA)
Description
UNITED STATES PATENT OEEIoE.
JOSEPH WOODWARD, OF LEAMINGTON, COUNTY QF WARWICK, ENGLAND.
IMPROVEMENT IN TREATING FURNACE-SLAG T0 CONVERT THE SAME INTO TILES, SLABS, AND BLOCKS.
Specification forming part of Letters Patent No. 221,649, dated November 11, 1879; application filed October 13, 1879.
To all whom it may concern.-
Be it known that I, J osEPH'WdoDwARD, of Lcamington, county of Warwick, England. have invented a new and useful Improvement in Treating Furnace-Slag to Convert the Same into Tiles, Slabs, and Blocks, of which the following is a specification.
My invention relates to the utilizing of fur- .nace slag or scoria by converting it-into tiles,
to a furnace or kiln, where they are subjected to a white heat, or to a heat as intense as possible without causing a refluxing of the slag.
The furnace or kiln is heated before the charging operation, after which the air must be excluded by a proper lutin g of all apertures, the supply of fuel to the kiln being then discontinued.
The tiles, blocks, or slabs are permitted to remain in the closed furnace or kiln for a length of time (ordinarily from four to sixhours) which may depend upon the size of the tiles or slabs and upon. the character of the slag used. On
removing the tiles or slabs they are permitted to become cool, and are then ready for use.
The slag by this process of tempering loses its brittle properties, and becomes so hard and compact thatthe tiles, slabs, or blocks can be used to advantage in the making of durable pavements, and for many other purposes.
Care should in all cases lie-taken to prevent the blocks or slabs from becoming reduced to a lower temperature than a blood-red color indicates before they are subjected to the greater heat by which the desired temper is imparted to them.
The inflammable waste gases of blast-furnaces may be utilized in heating the furnaces or kilns.
When slag has been tempered in the manner described it has none of the dark appearance of ordinary slag, but has the aspect and characteristics of a grayish, compact, hard, and fine grained stone.
When the molds are heated prior to receiving the molten slag, the tile, slab, or block will have the above characteristics throughout; but the use of chilled molds will result in the production of tiles or slabs with vitreous coatings, and these may be used to advantage in the building of sewers and for other purposes.
It should be understood, however, that when cold molds are used the slag therein should not be permitted to become cool before the tiles or slabs are placed in the furnace or kiln.
I claim as my invention- 1. The mode described of treating the slag or scoria of furnaces, the same consisting in first casting the molten slag in suitable molds for tiles, slabs, blocks, and other objects, and then removing the latter from the molds, and, while they are still hot, subjecting them to a greater heat in a closed furnace, all substantially as set forth.
2. As a new manufacture, a slag tile, slab, or block having a grayish appearance, and possessing the characteristics of a very hard, dense, and fine-grained stone, as set forth.
,In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
, JOSEPH WOODWARD.
Witnesses:
CHAS. F. TIETZE, HARRY SMITH.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US221649A true US221649A (en) | 1879-11-11 |
Family
ID=2291046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US221649D Expired - Lifetime US221649A (en) | Improvement in treating furnace-slag to convert the same into tiles, slabs |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US221649A (en) |
-
0
- US US221649D patent/US221649A/en not_active Expired - Lifetime
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