US7861955B2 - Wet-grinding gypsum with ... - Google Patents
Preparation of the ground gypsum is done using any known grinding method, particularly wet grinding. The finely ground solid product is useful as a filler in coatings, stone or cosmetics. Ground gypsum is also useful as an additive to stone or pharmaceuticals.
US2282091A - Process for preparing calcined gypsum ...
gypsum plaster process grinding Prior art date 1938-10-17 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 US235505A Inventor Oliver F Redd Original Assignee Oliver F Redd
US3573947A - Accelerator for gypsum plaster - Google Patents
a process for producing an accelerator for a calcium sulfate plaster comprising the steps of grinding together calcium sulfate dihydrate and sucrose at a temperature of up to about 145*f. until the surface area of the mixture is substantially increased, and heating the ground mixture under conditions which essentially preclude the formation of a dewpoint condition in the mixture to a final moisture content …
Wet-grinding gypsum with polycarboxylates - United States ...
Jan 04, 2011 · This invention relates to wet grinding of gypsum. More specifically, it relates to grinding of a slurry of gypsum with added dispersants. BACKGROUND OF THE INVENTION. Finely ground gypsum has many uses. It is added to cosmetics, stone or coatings as a filler. Pure, fine ground gypsum is also useful as a calcium supplement in foods or pharmaceuticals.
US4132565A - Accelerator for gypsum slurry - Google Patents
An improved accelerator is produced by impact and ball mill grinding gypsum board so that gypsum particles have size of less than one micron in diameter, in …
Calcium Sulfate Specified (e.g., Gypsum, Anhydrite ...
The method makes use of combining an additive with one or more components selected from a list of gypsum, hemihydrate, anhydrite, calcium sulfate to form a mixture then blending the mixture with clinker, and finally grinding the mixture and clinker to form cement.
Patents Assigned to National Gypsum Properties - Justia ...
Jun 01, 2018 · Gypsum slurries and boards and methods of making the same. Patent number: 10125049. Abstract: A slurry for manufacturing gypsum board comprises calcined gypsum, water, a foaming agent, and a coalescing agent. The foaming agent imparts a plurality of bubbles in the slurry.
US3920465A - Gypsum set accelerator - Google Patents
A gypsum set accelerator, produced by compression milling a mixture of ground gypsum rock and starch, and the addition thereof to an aqueous slurry of settable calcined gypsum such as in the forming of paper-covered gypsum wallboard.
grinding aid for low gypsum content - keithkirsten.co.za
A grinding aid composition suitable for grinding clinker into hydraulic cement ... amount of gypsum (calcium sulfate) in a finish grinding mill to provide a fine, homogeneous powdery product. ... They are used because of their availability and low cost. ... in amounts of up to about 1.5 times the carbon content.
Gypsum Grinding Machine Suppliers, all Quality Gypsum ...
Gypsum Grinding Machine, Gypsum Grinding Machine Suppliers Directory - Find variety Gypsum Grinding Machine Suppliers, Manufacturers, Companies from around the World at grinding machines ,spices grinding machine ,cylindrical grinding machines, Grinding Machines ... Self Patent (49) Self Brand (64) No. of Employees. 51 - 100 People (51) 101 ...
Gypsum Mills | Gypsum Pulverizers | Williams Crusher
gypsum mills & pulverizers Williams Patent Crusher offers a variety of gypsum mills and gypsum pulverizers that provide a wide range of available options and features. Natural gypsum, also known as “calcium sulfate dihydrate,” is a mineral that is found in sedimentary rock formations across 85 …
10TPH Gypsum Grinding Plant in Iran - LIMING(Shanghai)
10TPH Gypsum Grinding Plant in Iran. Powder making equipment adopts our company’s exclusive patent products——MTW series European type Trapezium Mill. The whole line is designed to be reasonable and concise; the craft is coherent and compact; the equipment layout is compact; the production is environmental and low carbon;
Portland cement - Wikipedia
Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout.It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin, and usually originates from limestone.It is a fine powder, produced by heating limestone and clay minerals in a kiln to form clinker ...
Gypsum Grinding Mill,Gypsum Grinding Machine,Gypsum ...
Gypsum Powder Processing Plant With Clirik Raymond Roller Mill In India. India Gypsum Powder Processing Plant With Gypsum Powder Processing Machine-Raymond Roller Mill From Clirik. Gypsum powder grinding production line . Gypsum powder has been used for a long time. In the early days, it was simply used to make chalk, putty, tofu and simple ...
What is Gypsum Board? – Gypsum Association
Gypsum board is the technical product name used by manufacturers for a specific board with a gypsum core and a stone facing and may be further described as follows: Regular Gypsum Board – a gypsum board with naturally occurring fire resistance from the gypsum in the core; or. Type X Gypsum Board – a gypsum board with special core additives ...
Calcium Sulfate (e.g., Gypsum, Anhydrite, Plaster Of Paris ...
Patent number: 9375899. Abstract: A composite product includes gypsum in an amount of 70 to 90% by weight, fibers in an amount of 1.5 to 26% by weight substantially homogeneously distributed through the composite, and a rheology-modifying agent in an amount of 0.5 to 6% by weight.
Grinding and calcining of gypsum with Pfeiffer grinding plants
Grinding and calcining of gypsum with Pfeiffer grinding plants TEXT Eckhard Sander, Gebr. Pfeiffer SE, Kaiserslautern/Germany For the production of plaster products natural gypsum, synthetic gypsum or a mixture of both are calcined. Depending on the production process two different modifications of the hemihydrate CaSO 4 x ½ H 2 O are obtained ...
Patents Assigned to United States Gypsum Company - Justia ...
Mar 07, 2018 · Justia - Patents - Patents and Patent Application Resources. Abstract: A bench top board scoring device is provided, having a frame having a first end and an opposite second end, a work area defined between the first and second ends, each end having at least one leg configured for contacting a substrate. A track is connected to the frame and extends between the first end and the …
US Patent for Method of water dispersing pregelatinized ...
Apr 28, 2006 · The invention provides in one embodiment a gypsum-containing slurry including stucco and an aqueous pre-dispersion of a pregelatinized starch. Also provided is a method of making gypsum wallboard by providing a pre-dispersion of the pregelatinized starch in water, and adding the pregelatinized starch pre-dispersion to the gypsum-containing slurry.
Asbestos Content in Canadian GLA Drywall Canada Gypsum ...
Gypsum, Lime and Alabastine Canada Limited changed its name to Kamic Ltd. in 1959 and it was aquired by Domtar Limited, 1959 In 1977, Domtar Limited’s name changed to Domtar Inc. The companys industry is described as a gypsum product manufacturer operating gypsum …