Study On Phosphorusgypsum And Powdered Coal Ash In Prouduct Of Cement

Phosphorus-gypsum is a by-product of phosphoric acid and some Compound Washing product industry . Powdered coal ash is a kind of powder which collected from waste gases of coal ash boiler . Because of it's large quantity of emission, low availability, serious pollution. How to make good use of the two kinds of industrial dross is one of the emphasis of research for ecologist.Phosphorus-gypsum, containing 90% of CaSO4-2H2O, Can be used as auxiliary material for production of Cement. There are many phosphorus-gypsum emitting factories and small cement plants in our country . So it has very significant real meanings to research phosphorus-gypsum for applied use . Modifying gypsum ball was exploited which substituted crude phosphorus -gypsum as regulate set agent, for cement production . This upgraded the using valuation of phosphorus -gypsum.The amount of emission of powder coal ash is 1.6 ton per year, but it's total availability is only 45%. By now , the accumulating amount is 2200 million tons , occupying area of 2.9 hectare . How to make good use of powder coal ash is a very significant researching project .New excitating agent was exploited which is for powder coal asn activation , produced high activating powder coal ash ball, used as mixed material for cement production . All of these improved the using valuation of powder coal ash .it has significant economic benefit and social benefit.