Preparation and characterization of phosphate rock as ...
Preparation and characterization of phosphate rock as quality ... 10 kg of phosphate rock (apatite) from Morocco, a commercial product purchased from a local market in Sa˜o Carlos, Sa˜o Paulo state, Brazil, was used. Instrumentation The sample was ground in a stainless steel multiuse laboratory grinder (Marconi model MA 630/1, Piracicaba ...