The invention relates to a recycling and clean production method for preparing
yellow phosphorus,
sylvite, aluminum
oxide, molecular sieves,
slag cement and architectural profiles through
potassium-bearing
phosphorite. The method utilizes two routes, for the first
route, high quality
yellow phosphorus is produced by the
potassium-bearing
phosphorite and
coke nuts through an electrothermal method, water
quenching is conducted on
yellow phosphorus slags, KAlO2 is dissolved out,
filtration is conducted, CO2 is introduced, Al(OH)3 is settled, first filtrate is obtained, and the Al(OH)3 is converted through
temperature control to obtain Al2O3. For the second
route,
orthoclase power and Na2CO3 are evenly mixed,
roasting is conducted through yellow
phosphorus tail gas, water leaching is conducted through water, the CO2 is introduced to settle out
silicon-aluminum
colloid, and second filtrate is obtained.
Crystallization and
drying are conducted on the first filtrate and the second filtrate, and K2CO3 and Na2CO3 are obtained. The Na2CO3 returns to the second
route to be recycled. The content of K2O, Na2O, SiO2 and Al2O3 is adjusted for partial
silicon-aluminum
colloid which is not subjected to
sedimentation and the filtrate, hydrothermal
crystallization reaction is conducted, and the molecular sieves are obtained; settled
silicon-aluminum
colloid is mixed with the yellow
phosphorus slags to prepare the
slag cement and / or the architectural profiles.