Experimental Study on Separation of a Specularite Ore in Gansu
With the continuous mining of a specularite mine in Gansu Province,the ore properties be-come worse,and the iron concentrate with qualified iron grade can not be obtained by using the original pro-cess of the concentrator.The ore dressing test is carried out for the mine.The results show that the roasting is carried out under the conditions of gas volume of 3 400 m3/h,gas calorific value of 4 000 kJ/m3,heating air volume of 3 600 m3/h and reduction zone temperature of 510℃.The concentrate of the roasted product is subjected to one roughing and three cleaning low intensity magnetic separation.The iron grade of the magnet-ic separation concentrate is 52.50%and the recovery rate is 85.07%.The closed-circuit test of one rough-ing,one cleaning and four scavenging reverse flotation was carried out with YG-328B as cationic collector and starch as inhibitor.The flotation concentrate grade is 57.96%,the recovery rate is 91.29%,and the re-covery rate of raw ore is 77.66%.The test results can not only help the production organization of the concen-trator,but also provide reference for the production organization of other types of mines in China.
specular iron oremagnetic roastingmagnetic separationreverse flotation
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