3 edition of Paper-Coating Clay From Coarse Georgia Kaolins by A New Attrtition-Grinding Process. found in the catalog.
Paper-Coating Clay From Coarse Georgia Kaolins by A New Attrtition-Grinding Process.
United States. Bureau of Mines.
|Series||Report of investigations (United States. Bureau of Mines) -- 5697|
|Contributions||Feld, I., Mcvay, T., Gilmore, H.|
Clays have been used by man as raw materials since the Upper Palaeolithic era. The use of clays in pottery ceramics was the most widespread application of clays for mankind in ancient times and the oldest ceramic article found is the Dolni Vestonice Venus, a female figurine dated at 26–30 ka (Vandiver et al., ).The oldest pottery ceramic articles found so far, which have also been dated. The coarse kaolin can be delaminated by e.g., grinding or milling (e.g., attrition grinding a dispersed slurry of crude or processed kaolin), of the coarse kaolin to give suitable delamination thereof, as described herein. Delaminated kaolins having a coarse particle size can be useful in .
Besides the main pigments for paper coating, only the most important special and additional coating pigments are described in more detail in this section (for others see Section ). Main Coating Pigments [16–19] Kaolin Clays Kaolin clays in paper coating have probably been used since the second half of the 19th century. 7. The invention here relates to the production of a kaolin2 product, for inter alia as a paper coating pigment, of a higher order of whiteness and brightness than has previously been attainable from secondary kaolin deposits,3 such as are found in central Georgia. Whiteness refers to the uniformity of reflectance throughout the visible spectrum and is determined by a comparison of the percent.
A paper coating composition comprising a coating base and a kaolin pigment of claim 1. A paper coating composition of cl wherein said coating base comprises at least one cellulose fiber, ancillary pigment, polymer, or sizing agent. A paper coating composition of cl wherein the kaolin pigment is derived from Rio Capim. You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them.
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Paper-coating clay from coarse Georgia kaolins by a new attrition-grinding process / By B. Clemmons, H. Gilmore, T. McVay and I. (Ignatz L.) Feld Abstract. Fold, T_N_ McVay, H.L.
Gilmore and B.H. Clemmons, Paper coating clay from coarse Georgia kaolins by a new attrition-grinding process, BuMines RI (), 20 pp. 2 by: The process has been described in a publication by Feld et al., Paper-coating clay from coarse Georgia kaolins by a new attrition-grinding process, Report of Investigations No.
U.S. Department of Interior, Bureau of Mines, The coarse fraction from the centrifuges is used either to make coarse filler clays or as feed to produce delaminated kaolins (Fig. The coarse thick vermicular stacks and books of kaolin are pumped to delaminators which shears the plates making up the stack or book into large diameter thin plates (Kraft et.
Kaolinite (/ ˈ k eɪ ə l ɪ n aɪ t /) is a clay mineral, part of the group of industrial minerals with the chemical composition Al 2 Si 2 O 5 is a layered silicate mineral, with one tetrahedral sheet of silica (SiO 4) linked through oxygen atoms to one octahedral sheet of alumina (AlO 6) octahedra.
Rocks that are rich in kaolinite are known as kaolin / ˈ k eɪ ə l ɪ n / or china ry: Phyllosilicates, Kaolinite-serpentine group.
The present invention relates to a hydrous kaolin product having improved optical properties, for example, when used in the production of paper products. The present invention comprises an improved barrier coating for paper and a method of making the coated paper.
The present invention also comprises an improved method from making filled and coated paper products. Innovative and efficient process developments enabled the kaolin industry to wet process over 5, tons in in Georgia and over 3, tons in the Cornwall district of southwestern England.
These two regions supply the major tonnage of paper coating clays for the world's paper industry. Cumulative particle size distribution curves for kaolins of different origin TABLE 6 Typical chemical analysis (Murray, ) Component Middle Georgia East Georgia English (%) (Cretaceous) (Tertiary) kaolin SiO2 A FezO3 TiOz MgO CaO Na20 0.
The kaolin (Al 2 Si 2 O 5 (OH) 4) group consisting of minerals such as kaolinite, dickite, nacrite and halloysite is important and widely used for various industrial applications of kaolins are largely in the manufacturing of paper, ceramics, paints and coatings among others.
Kaolins are in high demand in coating papers due to the rise in the use of paper products as an. Kaolinite is the dominant mineral present in these Georgia and South Carolina kaolins, generally comprising more than 90% of the mineral content (Murray, ).Other accessory minerals that are commonly present include quartz, muscovite, biotite, partially altered feldspar, and smectite along with minor amounts of halloysite, magnetite, ilmenite, rutile, anatase, zircon, tourmaline, and a few.
Kaolin is an abundant mineral in soils and sediments with a large variety of applications, such as paper coating, ceramic ingredient, rubber filler, cement  and adsorption of dyes . This clay mineral is a layer aluminosilicate in which an alumina octahedral sheet is fused to a silica tetrahedral sheet forming a layer that is held to.
The location and geology of the major clay deposits that are marketed worldwide and regionally include kaolins from the United States, Southwest England, Brazil, and the Czech Republic along with halloysite from New Zealand and ball clays from the US, England, Germany, and Ukraine. USA USDA USA US A US A US A US D A USD A US DA US A US A US A Authority US United States Prior art keywords clay hard calcined kaolin filler Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
However, in this chapter, only the major world-class deposits of kaolins (including halloysite and ball clay), bent- onites, and palygorskite–sepiolite that are marketed regionally or world- wide are described. KAOLINS United States The sedimentary kaolins in Georgia and South Carolina have been uti- lized since the middle s.
Paper-coating clay from coarse Georgia kaolins by a new attrition-grinding process. Author Clemmons, B. Published Chemical processing of Florida phosphate rock slime.
Author Stanczyk, Martin H. Published Electro-dewatering tests of Florida phosphate rock slime. Georgia and the SE USA, the hydrothermal kaolins of Cornwall in the UK and the bentonites from Milos, Greece.
(2) Clays of category 2 are specialty clays, which require advanced technologies for. USA USA USA US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords clay kaolin microspheres colloidal percent Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
USA USA USA USA US A US A US A US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords clay microns brightness particles fractured Prior art date Legal status (The legal status is an assumption and is not. The genesis of this kaolin has been established by Njoya et al., () as a result of a hydrothermal process.
This clay has been thoroughly described in the frame of its possible use in ceramic. Results of geochemical analysis show predominance of SiO 2 ( to 92 wt.
%) and Al 2 O 3 ( to wt. %) which support the kaolinitic nature of the clay and classify the clay as. USB2 US10/, USA USB2 US B2 US B2 US B2 US A US A US A US B2 US B2 US B2 Authority US United States Prior art keywords kaolin suspension particle size weight μm Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.For paper coating, 80% of the kaolin particles usually should be finer than 2 m m, whereas for paper-filler applications kaolins are coarser, ranging between 40% and 60%.The present invention provides kaolin clay pigments having at least the following characteristics: Brightness (GE): at least about ; Shape Factor: at least about 30; Brookfield viscosity, measured at 20 rpm and at less than or equal to about 65% solids: about to about centipoise; and Hercules viscosity, measured at 18 dynes and at less than or equal to about 65% solids: about