US927822A - Manufacture of lithographic stone artificially. - Google Patents

Manufacture of lithographic stone artificially. Download PDF

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Publication number
US927822A
US927822A US43820608A US1908438206A US927822A US 927822 A US927822 A US 927822A US 43820608 A US43820608 A US 43820608A US 1908438206 A US1908438206 A US 1908438206A US 927822 A US927822 A US 927822A
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US
United States
Prior art keywords
lithographic
manufacture
slabs
stone
slag
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
Application number
US43820608A
Inventor
Thomas Mathieson Thom
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BRITISH STONE AND MARBLE Co Ltd
Original Assignee
BRITISH STONE AND MARBLE Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BRITISH STONE AND MARBLE Co Ltd filed Critical BRITISH STONE AND MARBLE Co Ltd
Priority to US43820608A priority Critical patent/US927822A/en
Application granted granted Critical
Publication of US927822A publication Critical patent/US927822A/en
Anticipated expiration legal-status Critical
Assigned to NATIONAL SCIENCE FOUNDATION reassignment NATIONAL SCIENCE FOUNDATION CONFIRMATORY LICENSE (SEE DOCUMENT FOR DETAILS). Assignors: THE UNIVERSITY OF ILLINOIS
Expired - Lifetime legal-status Critical Current

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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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C04B35/65—Reaction sintering of free metal- or free silicon-containing compositions
    • C04B35/652—Directional oxidation or solidification, e.g. Lanxide process
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/43—Processes of curing clay and concrete materials

Definitions

  • Lithographic stones such as are usually employed for printing are natural products derived from certain special quarries and when large and of good quality are very expensive. It has been proposed to make litho graphic stones artilicially by taking the waste chips and debris from the quarries and stone yards, where such stones are hewn and grinding up the same into line powder, mixing the same with lime, slaking the mixture and molding it into slabs which when dry, are hardened by means of carbonic acid gas. These reconstructed lithographic. stones, when properly made are found admirable. I have now discovered that excellent lithographic stones can be made from the waste material known as slag in a somewhat similar way, with or without the addi tion of natural stone.
  • This material has already been ground up and used in making cement, tiles, bricks and as an ingredient in a variety of articles which contain slaked lime and are hardened by carbon dioxid, but has not been used in the manufacture of lithographic stone, the properties of which are peculiar and have not hitherto been satisfactorily reproduced or imitated except by the reconstruction oi the debris of the natural stone as above mentioned.
  • lithographic stone In manufacturing lithographic stone according to my present invention I take blast furnace or granulated slag and reduce the same to a condition of powder, by means of any suitable grinding apparatus.
  • the pow dered slag is mixed with a suitable proportion of lime and the mixture is slaked with Water. While in a plastic state the mixture of slag powder and lime is molded in dies under considerable compression into slabs of Specification of Letters Patent.
  • I may remark that to the ground slag may be added powdered natural stone, dolomite, silica, alumina, or marble obtained from the quarries or yards if desired.
  • the carbonatin g of the slabs may be etllected by any of the known methods, by means of which the thorough iinluration ot' the same is insured, for instance, the slabs having been molded and dried and placed in a closed .'essel, the air is exhausted from the latter and carbonic acid gas is allowed to enter.
  • the carbonic acid gas is gradually absorbed by the slabs and fresh gas is from time to time supplied but for a time not in sullicient quantity to reach atmospheric pressure, subsequently however for completing the carbonation actual pressure is necessary which will rary according to the thickness and density of the stone. For the largest stones used, pressure amounting to some 300-l00 lbs. to the square inch may be required.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Description

TTE STAT ALTENT orricn.
THOMAS MATIIIESON TI-IOM, OF WOODLANDS, HUGSII UNT, ENGLAND, ASSIGNOR TO THE BRIT- ISH STONE AND MARBLE COMPANY LIMITED, OF LONDON, ENGLAND, A CORPORATION OF GREAT BRITAIN.
MANUFACTURE OF LITHOGRAPHIC STONE ARTIFIGIALLY.
To all whom 'it may concern:
Be it known that I, THOMAS bIA'lHIIGSON Tnoai', a subject of the King of Great Britain, and resident of Voodlands, Cheshunt, in the county of I'Iertiord, England, lithographer, have invented new and. useful Improvements in the lvIaiuifacture of Lithographic Stone Artificially, of which the tollowing is a specification.
Lithographic stones such as are usually employed for printing are natural products derived from certain special quarries and when large and of good quality are very expensive. It has been proposed to make litho graphic stones artilicially by taking the waste chips and debris from the quarries and stone yards, where such stones are hewn and grinding up the same into line powder, mixing the same with lime, slaking the mixture and molding it into slabs which when dry, are hardened by means of carbonic acid gas. These reconstructed lithographic. stones, when properly made are found admirable. I have now discovered that excellent lithographic stones can be made from the waste material known as slag in a somewhat similar way, with or without the addi tion of natural stone. This material (slag) has already been ground up and used in making cement, tiles, bricks and as an ingredient in a variety of articles which contain slaked lime and are hardened by carbon dioxid, but has not been used in the manufacture of lithographic stone, the properties of which are peculiar and have not hitherto been satisfactorily reproduced or imitated except by the reconstruction oi the debris of the natural stone as above mentioned.
In manufacturing lithographic stone according to my present invention I take blast furnace or granulated slag and reduce the same to a condition of powder, by means of any suitable grinding apparatus. The pow dered slag is mixed with a suitable proportion of lime and the mixture is slaked with Water. While in a plastic state the mixture of slag powder and lime is molded in dies under considerable compression into slabs of Specification of Letters Patent.
Application filed June 12, 1908.
Patented July 13, 1909.
Serial No. 438,206.
a suitable size and tlllclfllOSS to form lithographic stones. \Vlien taken from the dies the slabs are dried and introduced into closed vessels into which carbonic acid gas is admitted or forced gradually until the lime is converted into carbonate and will absorb no more gas. Slabs thus produced "from slag it'ultil every requirement of lithographic stones and in many respects they are superior to the natural article.
I may remark that to the ground slag may be added powdered natural stone, dolomite, silica, alumina, or marble obtained from the quarries or yards if desired.
The carbonatin g of the slabs may be etllected by any of the known methods, by means of which the thorough iinluration ot' the same is insured, for instance, the slabs having been molded and dried and placed in a closed .'essel, the air is exhausted from the latter and carbonic acid gas is allowed to enter. The carbonic acid gas is gradually absorbed by the slabs and fresh gas is from time to time supplied but for a time not in sullicient quantity to reach atmospheric pressure, subsequently however for completing the carbonation actual pressure is necessary which will rary according to the thickness and density of the stone. For the largest stones used, pressure amounting to some 300-l00 lbs. to the square inch may be required.
What I claim as my invention and desire to secure by Letters Patent, is:
The process of maniiitacturing lithographic slone consisting in powdering slag, mixing it with lime, molding the mixture into slabs and submitting the molded slabs to the action of carbonic acid gas gradually admitted thereto until the entire mass is hardened.
In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
THOMAS HATHIESON TIIOM.
l/Vitnesses U. J. TILMAN, A. S. BISHOP.
US43820608A 1908-06-12 1908-06-12 Manufacture of lithographic stone artificially. Expired - Lifetime US927822A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US43820608A US927822A (en) 1908-06-12 1908-06-12 Manufacture of lithographic stone artificially.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US43820608A US927822A (en) 1908-06-12 1908-06-12 Manufacture of lithographic stone artificially.

Publications (1)

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US927822A true US927822A (en) 1909-07-13

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