US3437501A - Process for the manufacture of white quartz powder - Google Patents

Process for the manufacture of white quartz powder Download PDF

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Publication number
US3437501A
US3437501A US722434A US3437501DA US3437501A US 3437501 A US3437501 A US 3437501A US 722434 A US722434 A US 722434A US 3437501D A US3437501D A US 3437501DA US 3437501 A US3437501 A US 3437501A
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United States
Prior art keywords
mixture
white
sand
quartz
layer
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Expired - Lifetime
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US722434A
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English (en)
Inventor
Eugen Schneider
Erich Wegener
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Individual
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Individual
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/02—Pretreated ingredients
    • C03C1/022—Purification of silica sand or other minerals
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/28—Compounds of silicon
    • C09C1/30—Silicic acid
    • C09C1/309—Combinations of treatments provided for in groups C09C1/3009 - C09C1/3081
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
    • C09C3/043—Drying, calcination
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/06—Treatment with inorganic compounds
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values

Definitions

  • This invention relates to the manufacture of white quartz powder from quartz-containing sands and is based on a process in which these quartz-containing sands are mixed with an alkali metal salt and water, heated at about 1,200 C. to glowing point and subsequently ground u
  • the untreated initial sand has a mean white-content of 56 which is increased by grinding in the known manner to approximately 83. It is already known to admix the alkali metal salt to the glowing sand in the form of an aqueous solu tion. The white-content then reaches values of about 85 after grinding.
  • the white-content of the quartz powder may be increased to approximately 89 by appropriately choosing these alkali metal salts.
  • this process is carried out in a rotary furnace, in which the burners in the hottest part are fed with a mixture of fuel, and pulverized metal salt.
  • the present invention puts forward a process which makes it possible to obtain a white-content of at least 94, or even greater, from ground quartz sand.
  • white-content is to be taken as meaning the relative value A of brightness, which according to the German States Patent 0 3,437,501 Patented Apr. 8, 1969 Industrial Standards No. 5033 may be determined with the Elrepho instrument of Messrs. Zeiss.
  • a method for the production of white quartz powder from quartz containing sands comprising the steps of mixing quartz containing sand with about 1 percent of its weight of water and with about 1 percent of its weight of an alkali metal salt, forming the mixtures into a layer of about 3 centimeters uniform depth, inserting the mixture at substantially ambient temperature into a heating oven which is maintained at about *1200 C., heating the mixture while it is in a static condition to substantially said temperature and grinding the heated mixture.
  • the sand is dampened with approximately 1% of its weight of water; the dampened sand is then mixed with the salt and finally this mixture is heated in a static condition and at a 3 centimeter uniform depth.
  • the process in accordance with the invention may be carried out in a particularly simple manner in that the sand, the salt and the water can be mixed at normal room or ambient temperature. It is therefore not necessary to subject the salt to any kind of burners or to convey it into a hot environment with resultant sealing difticulties and signs of wear arising from this.
  • the mixing may be completed with the aid of ordinary weighing and mixing devices, without the need for trained labor or the constant surveillance of comparatively complicated apparatus.
  • the correct mixing ratio is always guaranteed because of the extraordinarily simple mixing process.
  • the mixture may be poured without difficulty, for example into ordinary trays, whereby care has only to be taken that a uniform pouring depth is maintained.
  • alkali metal salts While all alkali metal salts are operable in the method of the invention, preferred salts are sodium carbonate, sodium chloride, potassium carbonate and potassium chloride. These salts are preferred for economic reason.
  • Example 1 It is essential that the mixture be formed into a layer of 3 centimeters depth in order for optimum results to be obtained. This is demonstrated in Example 1 below.
  • a composition was prepared by mixing a quantity of quartz containing sand with 1% of its weight of water, and 1% of its weight of sodium carbonate. The mixture was then divided into four portions or samples. Each Zample was spread out in a tray in a layer of uniform epth.
  • the first sample was spread out in a zero (0) thickness layer, ie, it was spread out on the surface of the tray in a layer having essentially no thickness.
  • the second sample was formed into a layer having a uniform depth of 1 centimeter, the third sample into a layer having a uniform depth of 2 centimeters and the fourth sample into a layer having a uniform depth of 3 centimeters.
  • Each sample was then inserted into a mufiie furnace maintained at approximately 1200 C., and the timetemperature values during the time it took for each sample to reach a temperature of 1200 C. were observed.
  • EXAMPLE 2 White content FeaOa content Sand (percent wt.) Ground without Ground with the treatment in treatment in accordance with accordance with the invention the invention 1 1
  • the sand was mixed with 1% of its weight of water and 1% of its weight of sodium carbonate, and processed in accordance with the method of the invention.
  • a method for the production of white quartz powder from quartz containing sands comprising the steps of mixing the sand with about 1 percent of its weight of water and with about 1 percent of its weight of an alkali metal salt, forming the mixture into a layer of uniform depth of about 3 centimeters, inserting the mixture which is at ambient temperature into a heating oven which is maintained at about l200 C., heating the mixture while it is in a static condition to said temperature and grinding the heated mixture.
  • alkali metal salt is selected from the group consisting of sodium carbonate, potassium carbonate, sodium chloride, or potassium chloride.
  • a method for the production of white quartz powder from quartz containing sands comprising the steps of dampening the sand with about 1 percent of its Weight of water, mixing the dampened sand with about 1 percent of its weight with an alkali metal salt, forming the mixture into a layer of uniform depth of about 3 centimeters, inserting the mixture while it is at ambient temperature into a heating oven which is maintained at about l200 C., heating the mixture while it is in a static condition to said temperature and grinding the heated mixture.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Silicon Compounds (AREA)
  • Glass Compositions (AREA)
  • Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
US722434A 1965-03-18 1968-04-18 Process for the manufacture of white quartz powder Expired - Lifetime US3437501A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEW38789A DE1263724B (de) 1965-03-18 1965-03-18 Verfahren zur Herstellung weisser Quarzpulver
DEW0040673 1966-01-07

Publications (1)

Publication Number Publication Date
US3437501A true US3437501A (en) 1969-04-08

Family

ID=26002736

Family Applications (1)

Application Number Title Priority Date Filing Date
US722434A Expired - Lifetime US3437501A (en) 1965-03-18 1968-04-18 Process for the manufacture of white quartz powder

Country Status (9)

Country Link
US (1) US3437501A (enrdf_load_stackoverflow)
AT (1) AT265209B (enrdf_load_stackoverflow)
BE (1) BE678012A (enrdf_load_stackoverflow)
CH (1) CH468935A (enrdf_load_stackoverflow)
DE (2) DE1263724B (enrdf_load_stackoverflow)
DK (1) DK116126B (enrdf_load_stackoverflow)
GB (1) GB1097059A (enrdf_load_stackoverflow)
LU (1) LU50679A1 (enrdf_load_stackoverflow)
NL (1) NL6603608A (enrdf_load_stackoverflow)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB877890A (en) * 1958-09-05 1961-09-20 British Ind Sand Ltd Improvements in the preparation of silica flour

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB877890A (en) * 1958-09-05 1961-09-20 British Ind Sand Ltd Improvements in the preparation of silica flour

Also Published As

Publication number Publication date
DE1592304A1 (de) 1970-12-10
NL6603608A (enrdf_load_stackoverflow) 1966-09-19
BE678012A (enrdf_load_stackoverflow) 1966-09-01
CH468935A (de) 1969-02-28
DK116126B (da) 1969-12-15
GB1097059A (en) 1967-12-29
LU50679A1 (enrdf_load_stackoverflow) 1966-05-17
DE1263724B (de) 1968-03-21
AT265209B (de) 1968-10-10

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