Pre-discarding Practice Using Screening Classification Combined with Gravity Separation Before Flotation of Scheelite Ore from Hunan Province
To examine the industrial feasibility of pre-discarding by using screening classification combined with gravity separation in processing of a scheelite ore from Hunan Province,industrial distributary and flotation trial tests were carried out.The results show that a process consisting of screening and spiral chute discarding under optimized conditions can discard tailings grading 0.034%WO3 with a yield of 25.50%in mass,leading to tungsten loss of only 2.99%.With this pre-discarding before flotation process,both the grade and recovery of the final flotation concentrate are improved,compared to the concentrate obtained from direct flotation of overflow product.
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