+86 15516432285

gypsum grinding patent

US7861955B2 - Wet-grinding gypsum with ... - Google

Wet-grinding gypsum with polycarboxylates Download PDF Info Publication number US7861955B2. ... 2009-05-21 Publication of US20090127360A1 publication Critical patent/US20090127360A1/en 2011-01-04 Application granted granted Critical 2011-01-04 Publication of US7861955B2 publication Critical patent/US7861955B2/en Status Active legal-status Critical Current 2029-02-13 Adjusted expiration

More

US4238445A - Process for manufacturing gypsum board ...

A process and apparatus for producing a healed stucco having lowered water demand without loss of normal strength development potential which comprises, while blending a small amount of water with the calcined gypsum, simultaneously or substantially simultaneously grinding the calcined gypsum so as to increase the surface area of the calcined gypsum particles while incorporating about 1-10% by ...

More

US4360386A - Treating calcined gypsum ... - Google Patents

A process for producing a healed stucco of low water demand is disclosed in which calcined gypsum is treated with an aqueous solution of a gypsum solubilizing agent, preferably in an impacting blender while grinding the calcined gypsum to increase its surface area. The product can be dried for storage or sent directly to forming gypsum board.

More

US4132565A - Accelerator for gypsum slurry - Google

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 the absence of an additive to inhibit calcination. US4132565A - Accelerator for gypsum slurry - Google Patents Accelerator for gypsum slurry Download PDF Info Publication number US4132565A. US4132565A US05/847,224 US84722477A US4132565A

More

GYPSUM SET ACCELERATOR AND METHOD OF

The gypsum (calcium sulfate dihydrate) used in the grinding process may be any natural or synthetic gypsum dihydrate material of either high or low grade and of appropriate feed size for grinding, Freshly mined gypsum, such as high-grade landplaster, which is 80 or more weight % dihydrate, is particularly suitable. The dihydrate may contain impurities and inert materials without substantial ...

More

Wet-grinding gypsum with polycarboxylates - United

The teachings of the '129 Patent would not be suitable for finely grinding the gypsum slurry of this invention. SUMMARY OF THE INVENTION. Improvements to wet-grinding of gypsum are found in a method of making a finely ground gypsum product that uses a dispersant to grind particles to a smaller particle size than is achievable without it. The dispersant is a polycarboxylate dispersant that is ...

More

System and method for calcining gypsum - ALSTOM

United States Patent 7897134 . Abstract: A system (100) for calcining natural gypsum, synthetic gypsum (112) or a ... It should be appreciated that grinding of gypsum in a mill may be performed by, for example, crushing or grinding mechanisms, such as hammers, while drying gypsum in the mill 114 may be performed by contacting the gypsum with a stream of air or hot gas. In one embodiment ...

More

Method of treating cement clinker - Google Patents

A method of treating cement clinker by grinding the clinker in a tubular mill while charging water, gypsum, and, optionally, also a water-reduction agent to the mill at the same time. The water has a pH of from about 9 to about 13. A microfill agent and/or a water-reduction agent is mixed with said the high pH-value water to form a slurry, which is added to the clinker during the grinding ...

More

METHOD FOR MANUFACTURING GYPSUM BANDAGE -

Patent: Patent (Second Publication) - Russian Federation. Application: ... The mixture obtained undergoes wet grinding to be applied then onto textile material and thermally fixed at 107-170 C to obtain semiwater gypsum. Such homogeneous gypsum bandage provides necessary velocity for adhesion, rapid impregnation and low gypsum washing out at pressing out. EFFECT: higher

More

Gypsum grinding patent – Grinding Mill China

gypsum grinding patent. Patent US4132565 Accelerator for gypsum slurry Google Patents. Jan 2, 1979 An improved accelerator is produced by impact and ball mill grinding gypsum board » Learn More. US Patent # 4,011,092. Stannous sulfate and gypsum mixture as. Stannous sulfate and gypsum mixture as a retarder in grinding portland cement and blended hydraulic cement for improving the

More

System and method for calcining gypsum - ALSTOM

United States Patent 7897134 . Abstract: A system (100) for calcining natural gypsum, synthetic gypsum (112) or a ... It should be appreciated that grinding of gypsum in a mill may be performed by, for example, crushing or grinding mechanisms, such as hammers, while drying gypsum in the mill 114 may be performed by contacting the gypsum with a stream of air or hot gas. In one embodiment ...

More

METHOD FOR MANUFACTURING GYPSUM BANDAGE -

Patent: Patent (Second Publication) - Russian Federation. Application: ... The mixture obtained undergoes wet grinding to be applied then onto textile material and thermally fixed at 107-170 C to obtain semiwater gypsum. Such homogeneous gypsum bandage provides necessary velocity for adhesion, rapid impregnation and low gypsum washing out at pressing out. EFFECT: higher

More

US Patent for Process for manufacturing gypsum board ...

A process and apparatus for producing a healed stucco having lowered water demand without loss of normal strength development potential which comprises, while blending a small amount of water with the calcined gypsum, simultaneously or substantially simultaneously grinding the calcined gypsum so as to increase the surface area of the calcined gypsum particles while incorporating about 1-10% by ...

More

GCP Applied Technologies receives European patent on ...

The patent relates to methods for improving the efficiency of grinding materials such as clinker and limestone, using glycerol derived from biofuel production, in combination with various grinding additives. GCP products can help shrink the carbon footprint of cement and concrete. Grinding aids and quality improvers make cement manufacturing more efficient, while concrete admixtures can reduce ...

More

Calcium Sulfate Specified (e.g., Gypsum, Anhydrite ...

14/10/2014  Abstract: The invention provides methods and compositions for producing and grinding cement. 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.

More

US Patent for Stannous sulfate and gypsum mixture as a ...

Justia Patents US Patent for Stannous sulfate and gypsum mixture as a retarder in grinding portland cement and blended hydraulic cement for improving the quality of the cement, mortar and concrete Patent (Patent # 4,011,092)

More

Calcium Sulfate (e.g., Gypsum ... - Justia Patents Search

The cement manufacturing apparatus comprises a removal means for removing unburned carbon from gypsum, and a grinding means for grinding gypsum from which unburned carbon is removed by the removal means together with clinker to generate cement. With the apparatus, total unburned carbon content in cement can be reduced, and the quantity of fly ash used in the apparatus can be, increased

More

Calcium Sulfate (e.g., Gypsum ... - patents.justia

Search for Calcium Sulfate (e.g., Gypsum, Anhydrite, Plaster Of Paris, Etc.) Patents and Patent Applications (Class 106/772) Filed with the USPTO

More

What is the 200–3000 mesh gypsum ultrafine grinding

As a powder equipment manufacturer, Fengli production of gypsum ultrafine grinding mill price is more reliable, more stable performance is a quality equipment to promote the gypsum to achieve ...

More

METHOD FOR MANUFACTURING GYPSUM BANDAGE -

Patent: Patent (Second Publication) - Russian Federation. Application: ... The mixture obtained undergoes wet grinding to be applied then onto textile material and thermally fixed at 107-170 C to obtain semiwater gypsum. Such homogeneous gypsum bandage provides necessary velocity for adhesion, rapid impregnation and low gypsum washing out at pressing out. EFFECT: higher

More

GCP Applied Technologies receives European patent on ...

The patent relates to methods for improving the efficiency of grinding materials such as clinker and limestone, using glycerol derived from biofuel production, in combination with various grinding additives. GCP products can help shrink the carbon footprint of cement and concrete. Grinding aids and quality improvers make cement manufacturing more efficient, while concrete admixtures can reduce ...

More

Patents Assigned to National Gypsum Properties - Justia ...

17/10/2016  Additives or combinations of additives for improving compressive strength, fluidity and/or set time of the gypsum product are mixed in intimate contact with raw gypsum prior to or during grinding and/or flash calcination to form stucco. The stucco is used to prepare a gypsum slurry which is shaped and sets to form the gypsum product.

More

Calcium Sulfate (e.g., Gypsum ... - Justia Patents Search

The cement manufacturing apparatus comprises a removal means for removing unburned carbon from gypsum, and a grinding means for grinding gypsum from which unburned carbon is removed by the removal means together with clinker to generate cement. With the apparatus, total unburned carbon content in cement can be reduced, and the quantity of fly ash used in the apparatus can be, increased

More

Cement grinding media sorter and operating method

(57) Summary of the corresponding patent WO2017051377 (A1): A cement grinding media sorter and its operating method, wherein the grinding media are alloy steel balls. The operating method comprises loading the grinding media; separating the scrap and dust; separating non-spherical or asymmetrical elements; separating the grinding media whether above or below a predetermined size threshold ...

More

Calcium Sulfate Specified (e.g., Gypsum, Anhydrite ...

14/10/2014  Abstract: The invention provides methods and compositions for producing and grinding cement. 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.

More

Method and apparatus for calcining gypsum -

14/03/2006  Justia Patents US Patent Application for Method and apparatus for calcining gypsum Patent Application (Application #20070215020) Method and apparatus for calcining gypsum . Mar 14, 2006 - National Gypsum Properties, LLC. The subject invention relates generally to methods and apparatuses for calcining gypsum. The apparatuses and methods place a gypsum particle optimizer

More

UNITED STATES PATENT AND TRADEMARK OFFICE BEFORE THE ...

UNITED STATES GYPSUM COMPANY, Patent Owner _____ Case: IPR2017-01351 U.S. Patent No. 7,758,980 _____ PETITIONER’S ... boric acid, grinding aids, changes in stucco grinding to optimize particle size distribution, testing of new technology for particle size measurement, evaluation and optimization of the use of synthetic gypsum, and evaluation of pretreatment of stucco to reduce water

More

Patents Assigned to United States Gypsum Company -

16/03/2017  Abstract: A modified gypsum set accelerator and a method of preparing the same is provided, which includes dry loose finely ground particles of a mixture of ground dry calcium sulfate dihydrate and a grinding aid selected from one or more of beta-naphthalene sulfonate formaldehyde condensate, trimetaphosphate phosphate salt, tripolyphosphate salt, tetra-pyrophosphate salt, and

More

Efficient processes for grinding and ... - Cement Lime

The grinding media lifetime can be increased by up to +50 %, while the steel contamination sees a decrease of up to -50 gr/t. In addition, the ball mill noise emission of the second chamber, the coating effect in it as well as the use of grinding aid can also be significantly reduced. Another effect is a lower grinding heat and therefore a reduced cement temperature after the ball mill.

More