Technology for preparation of dihydrate gypsum by recycling of filter press fluorine waste residue
The invention relates to a technology for preparation of dihydrate gypsum by recycling of filter press fluorine waste residue. The technology includes the steps of: weighing raw materials according to the weight percentage: 20%-40% of dry process gypsum, 40-60% of wet gypsum, 15%-25% of filter press...
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| creator | WANG LIN HE YAJUN YE JUN LIU WUHONG ZENG YUNJUN |
| description | The invention relates to a technology for preparation of dihydrate gypsum by recycling of filter press fluorine waste residue. The technology includes the steps of: weighing raw materials according to the weight percentage: 20%-40% of dry process gypsum, 40-60% of wet gypsum, 15%-25% of filter press residue, and 0.5%-1.5% a composite admixture; mixing the dry process gypsum with the filter press residue evenly in proportion; adding the well mixed materials, the wet gypsum and the composite admixture into a mixing breaking machine, and controlling the particle size of the mixed and broken material not greater than 100mm; conducting aging and hydration: stockpiling the material for 48-96h, thus obtaining the dihydrate gypsum. The product produced by the invention has a SO3 content of over 38%, a crystal water content of over 8% above, and an attached water content within 12%. The dihydrate gypsum contains a small amount of attached water, almost does not generate dust during use, and is non-acidic, thus belongi |
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The technology includes the steps of: weighing raw materials according to the weight percentage: 20%-40% of dry process gypsum, 40-60% of wet gypsum, 15%-25% of filter press residue, and 0.5%-1.5% a composite admixture; mixing the dry process gypsum with the filter press residue evenly in proportion; adding the well mixed materials, the wet gypsum and the composite admixture into a mixing breaking machine, and controlling the particle size of the mixed and broken material not greater than 100mm; conducting aging and hydration: stockpiling the material for 48-96h, thus obtaining the dihydrate gypsum. The product produced by the invention has a SO3 content of over 38%, a crystal water content of over 8% above, and an attached water content within 12%. The dihydrate gypsum contains a small amount of attached water, almost does not generate dust during use, and is non-acidic, thus belongi</description><language>chi ; eng</language><subject>ARTIFICIAL STONE ; CEMENTS ; CERAMICS ; CHEMISTRY ; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS ; CONCRETE ; LIME, MAGNESIA ; METALLURGY ; REFRACTORIES ; SLAG ; TREATMENT OF NATURAL STONE</subject><creationdate>2014</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20141029&DB=EPODOC&CC=CN&NR=104119012A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20141029&DB=EPODOC&CC=CN&NR=104119012A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>WANG LIN</creatorcontrib><creatorcontrib>HE YAJUN</creatorcontrib><creatorcontrib>YE JUN</creatorcontrib><creatorcontrib>LIU WUHONG</creatorcontrib><creatorcontrib>ZENG YUNJUN</creatorcontrib><title>Technology for preparation of dihydrate gypsum by recycling of filter press fluorine waste residue</title><description>The invention relates to a technology for preparation of dihydrate gypsum by recycling of filter press fluorine waste residue. The technology includes the steps of: weighing raw materials according to the weight percentage: 20%-40% of dry process gypsum, 40-60% of wet gypsum, 15%-25% of filter press residue, and 0.5%-1.5% a composite admixture; mixing the dry process gypsum with the filter press residue evenly in proportion; adding the well mixed materials, the wet gypsum and the composite admixture into a mixing breaking machine, and controlling the particle size of the mixed and broken material not greater than 100mm; conducting aging and hydration: stockpiling the material for 48-96h, thus obtaining the dihydrate gypsum. The product produced by the invention has a SO3 content of over 38%, a crystal water content of over 8% above, and an attached water content within 12%. 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| subjects | ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA METALLURGY REFRACTORIES SLAG TREATMENT OF NATURAL STONE |
| title | Technology for preparation of dihydrate gypsum by recycling of filter press fluorine waste residue |
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