Process for recovering barite from drilling muds

Details Process for recovering barite from drilling muds Process for recovering barite from drilling muds

B - Operations, Transporting

03

D

361/19

B03D 1/02 (2006.01) B03D 1/014 (2006.01) E21B 21/06 (2006.01)

Patent

CA 1310144

Process for recovering barite from drilling muds ABSTRACT At present the usual method of recycling of drilling muds by the exclusive application of classifying processes during drilling rig operation leads to the disposal of fine grained barite containing waste materials. In this invention, a simple one- stage flotation process using alkylphosphate based collecting and foaming reagents is applied to recover the barite content of such muds thus producing a marketable barite concentrate. The flotation should preferably be carried out at pH 8 to 9 with CaO, Ca(OH)2 or KOH as regulating reagents and with the optimal solids content in the flotation pulp (preferably 100 g/l). The solids content in the flotation pulp can easily be adjusted by diluting with process water. - 2 -

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