Gypsum pdf 1. It mixes up easily with water. Plaster was discovered in Catal-Huyuk in Asia in an underground fresco, and in Israel Gypsum floor screeds were found from B. During the time of the Pharaohs, Gypsum was used as mortar in the construction of the Cheops Pyramid B. In the Middle Ages and the Renaissance, decorations and artistic creations were made of plaster. Since then, the range of construction-related uses have continued to multiply. Raw material 1. High-quality gypsum rock is extracted at quarries or mine crusher 2.
Large rocks are crushed into small pieces Grinding mill 3. The mill reduces small rocks to a very fine, chalk-like powder called land plaster. Calcine system 4.
The land plaster is heated in large kettles to remove most of the water from the plaster. Stucco holding tank 5. Calcined land plaster, called stucco, is fed from a holding bin to the mixer by a screw conveyor.
In the mixer, water is added back to the stucco to form a slurry, and foam is added to the slurry to make the wallboard more lightweight. Forming station 7. T he board forming line starts with two large rolls of recycled paper or fiberglass mats.
The slurry is poured onto the bottom sheet and is immediately covered by the facing sheet from the other roll. Board line 8. During this trip, water rehydrates the stucco, causing it to harden. Cut —off knife 9.
Transfer table Here the cut lengths are turned face-side up to protect the face paper or mat, then fed into the kiln. Kiln The board kiln completes the drying process, leaving the gypsum board virtually moisture-free. The properties of plasterboard can be modified to meet specific requirements , such as fire resistance, humidity resistance, shock resistance, etc.
Paper 9: Comprehensive solutions for gypsum grinding and calcining - Latin America contract commissioned: Viktor Zerr: Gebr. Paper Glass non-woven helps gypsum boards to increase market penetration in lightweight construction: Rachel Marcon: Owens Corning. Paper Reducing the shrinkage behaviour of glass fibre reinforced plasterboards by use of special clay blends to improve fire resistance: Matthias Schellhorn: Ralf Diedel, Stephan Schmidt KG.
Paper Insight into the effects of sodium dicarboxylates on the crystal habit of alpha-calcium sulfate hemihydrate: Yongbo Tang: Southeast University of China. Paper 9: Transforming the Asia-Pacific building market with glass — delivering superior performance to gypsum boards: James Lyon: Owens Corning. Paper Gypsum treatment with Pfeiffer technology for better plaster properties: Robert Schnatz: Gebr.
Paper Achieving and maintaining high accuracy and reliability in dry material feeding: Steve Becker: Schenck Process. Paper The changing demands on forming belts in gypsum wallboard production: Neil Woolliscroft: Derco. Paper 9 Modernising speech privacy in commercial buildings with sound-damping gypsum wallboard: Ben Shafer: Pabco Gypsum. Paper 11 Challenges in high temperature board dryer chain lubrication: Stefan Winkler: FuchsLubritech.
Paper 12 Using combustion systems programs to drive safety, efficiency and reliability in the wallboard industry: Lessons learned from multi-year corporate programs: Mark Kampe: CEC Combustion Safety. Paper 14 Understanding and using moisture analysis of plaster in gypsum board manufacturing: Jeff Warren: Gyptech.
Paper 1 Gypsum to gypsum - First steps towards a circular gypsum economy: Christine Marlet: Eurogypsum. Paper 5 Gypsum - A lifetime passion: From phosphogypsum to alpha-hemihydrate processing: Alfred Brosig, independent consultant.
Paper 13 The use of styrene maleic anhydride co-polymers as a dispersing agent for wax emulsions to improve hydrophobicity in gypsum boards: Daniela Ribezzo: Polyscope Polymers BV.
Paper 14 Novel additive for water-resistant ready-mix wallboard joint compound: Amba Ayambem: Henry Company. Paper 15 New functionality for gypsum panels: moving glass from the outside to the inside: Jan Coerts: Owens Corning. Paper 17 The application of fuel and air ratio controls for combustion systems: Technical considerations for gypsum wallboard manufacturing: Dustin Neumann: Neumann Process Control, Inc.
Paper 9: Maximising plant energy efficiency: An analytical approach to prioritising and implementing energy-saving initiatives: Dustin Neumann: Neumann Process Control, Inc.
Paper Importance of consistent unwinding in gypsum board production: Michael Sellers: M. Torres - Paper Division. Paper Bag packaging solutions: Filling of well-known valve bags vs. Gypsum ore, from quarries and underground mines, is crushed and stockpiled near a plant. Asneeded, the stockpiled ore is further crushed and screened to about 50 millimeters 2 inches in diameter. If the moisture content of the mined ore is greater than about 0.
The ground gypsum exits the mill in a gas stream and is collected in a product cyclone. Ore is sometimes dried in the roller mill by heating the gas stream, so that drying and grinding are accomplished simultaneously and no rotary dryer is needed.
The finely ground gypsum ore is known as landplaster, which may be used as a soil conditioner. Gypsum processing equipment differs significantly in scale and level of technology. SBM is a professional global manufacturer of mining equipment, we could provide complete set of gypsum production line. Our equipment has the benefits of high performance, low operation cost, cost-effective. They have create huge wealth for our customer. If you have interests, please know more about SBM machinery.
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