The Application Study Of Ceramics Filter On Concentrate And Tailing Classified

Concentrate dewatering is a necessary procedure for any mineral processing plant,because the particle size of mineral become finer,the high dewatering technology becomes more and more importantFanKou Lead-Zinc Mine is a large scale lead-zinc mine.There two factors make the concentrate dewatering very difficult,one is tha galenate and sphalerite is very fine,especially galenate,it's grinding size is about 90% minus 40 micrometer,which leading to the content of 90% minus 20 micrometer in galenate concentrate,the other is high PH value technics used in lead-zinc sparation,which lead to high vicidity of the pulp.On the base of great amount conference,the reseacher analyse the principle and applicability of all kind of filter equipment,and select the cemermic filter made in Outokunpu,Finland as dewatering equipment for lead conentrate,zinc concentrate and sulphrite,and choose the cemermic filter made in china as dewatering equipment for the tailings classified.The application of the cemermic filter solved sucessefully the technic problem existed in concentrate dewatering in FanKou Lead-Zinc Mine.The research work included three,(l) small scale test and industry experiment with import cemermic filter,(2)the study on jam principle and laundering methods of cemermic ban with mport cemermic filter,and (3)the laboratory and industry research of the cemermic filter made in china used for the dewater in tailings classified.The main conclusions show as follow:1. The laboratory experiments showed that the cemermic filter can decrease the moisture of filter cake from 12.5% to 10.79% , from 13.37% to 10.81% and 14.21% to 11.10% respectively for lead concentrate,zinc concentrate and pyrite concentrate.the higher the feed thickness,the higher the capacity and the moisture.if 10% and 9% moisture is respectively thestandard of the cake, then the feed thickness must be less than 75% and 72% respectively.the higher the pulp level, the higher the capacity and the moisture.combining the moisture standard and the capacity of filter,the optimum pulp level was choosed as 76-86%.the rotate speed of the drum increased, the capacity increased synchronously,the maxium capacity was taken place at 80% rotate speed.2.the difficult cleaning problem of cemermic ban was solved by the new method of chemicals and ultrasonic,the chemicals include lime,oxalic acid and nitric acid.in this method the finestra revivification ratio is 100%,98.2% and 96.65% respectively for zinc, mixture and lead concentrate,pyrite concentrate is exceptional,the the finestra revivification ratio is 89.37%.3. Obvious benefication can be acquired by using import cemermic filter because of it's low energy consumption and low moisture.the energy consumption using cemermic filter for contentrate dewatering is 2.116kw/t compared with common vacuum filter,therefor the mineral processing plant save the cost about 3 million Yuan= Because moisture decrease,the route consumption of concentrte decrease during trasportatione,the profit thousands was acqured as concentrate consumption decrease 130 tone every year.4. Chinese cemermic filter can be adopted for classified tailings dewatering,the laboratory test showed that two kinds of cemermic filter, BST and HTG,all can be used for tailings dewatering.Under the optimal feed thickness of 57-65% and 55-65% respectivly for BST and HTG,they all can satisfy the demands of capacity and moisture.considered that HTG-45 cemermic filters have been used in china, the industry production selected one HTG-45 cemermic filter.During stable operation the capacity was 40.72t/h,and the moisture of cake was 11.14%, which satisfied the demand of dewatering.