What is the difference between desulfurization gypsum mortar with phosphorus gypsum mortar?

Desulfurization gypsum is to join in the limestone slurry and so2 in flue gas is generated calcium sulphate,

Throw away don't generally, also someone to do building gypsum, etc

And phosphorus gypsum (calcium phosphate) and sulfuric acid reaction of phosphate rock is generated by-products is calcium sulphate, but inside many impurities, such as not decomposition of phosphate rock, sio2, and other complex, utilization rate is very low, generally in the open air, landfill treatment

Desulfurization gypsum: fuel combustion emissions after desulphurization purification treatment of ash.

Phosphogypsum: rock phosphate with sulphuric acid treatment after preparing phosphoric acid residual sludge with lime neutralization excess sulfuric acid slag.

Appearance: output of desulfurization gypsum desulfurization normal color is almost white, sometimes with a yellowish-white or beige, impurity content change when the filter run unstable, bring in more impurities such as fly ash, a gray color. As raw material of producing gypsum building materials, general requirements desulfurization gypsum white degree is more than 80%, and the color graying population of desulfurization gypsum contains many impurities, affect their performance.

Layered segregation phenomenon is serious, bulk density is bigger, in the production of gypsum slurry, desulfurization gypsum easy to precipitate, different natural gypsum can be mixed and water well, brings difficulties to the construction and production, making it more difficult for the production, or production intensity distribution, easy to damage. Part of flue gas desulfurization gypsum crystal internal pressure exists, and natural gypsum are mainly exist in uniform state. Desulfurization gypsum impurities and easy grinding large difference between the natural gypsum after grinding of coarse particles of impurities, and the desulfurization gypsum particles more for gypsum, fine particles of impurities, its characteristic is the opposite of natural gypsum. Particle size and size distribution, particle size of flue gas desulfurization gypsum is relatively average, with its distribution is very narrow, particles are mainly concentrated in 40. Between 60 Lin, grading far worse natural gypsum grinding fine after gesso.

In desulfurization gypsum powder production line, the desulfurization gypsum production process, in comparison with natural gypsum desulfurization gypsum bulk density of natural gypsum, made of desulfurization gypsum wallboard quality is bigger, such as to transportation and construction brings about some difficulties, such as and, due to some major requirements of lightweight materials building, desulfurization gypsum can't use, the serious influence the using performance of desulfurization gypsum.