Research on depressing capability of organophosphonic acid PBTCA in the reverse flotation of magnesium from collophanite
In order to study the depressing capability of small molecule organic phosphonic acid 2-phosphonic acid butane-1,2,4-tricarboxylic acid(PBTCA)and phosphoric acid,the reverse flotation process is used for experimental research until.The experimental results show that small molecule organophosphonic acid PBTCA has strong selective depressing capability.After milled to a fineness of＜0.074 mm accounting 60.8%,the pulp is processed by a single reverse flotation process,using once roughing once sweeping process the sequence ore returns to the closed-circuit process,the dosage of sulphuric acid,PBTCA,LAA-D optimized respectively at 12.0,1.0 and 0.9 kg/t added to roughing,the amount of sulphuric acid added to sweeping for 1.0 kg/t,and the obtained concentrate P2O5 content and recovery rate are 31.14%and 96.04%,respectively;The MgO content in the concentrate is 0.85%,and the P2O5 content in the tailings is only 5.06%.The use of PBTCA has better depressing capability than phosphoric acid.The use of PBTCA as a depressant not only improves the beneficiation index,but also reduces the dosage of reagents.
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