Study on dewatering experiment of fine particle coal with magnetic water adsorption resin

In order to study the dewatering performances of the fine partical coal with the magnetic high water adsorption resin,a magnetic sodium polyacrylate( magn etic PAAS) water adsorption resin was prepared,the magnetic mineral crystalline state in the magnetic PAAS resin was characterized and the swelling performances of the resin in water were measured. The maxing ratio between the resin and fine particle coal,mixing time,initial moisture content of the fine particle coal,repeated utilization of th e resin and other factors affected to the dewatering effect were investigated. The results showed that Fe3 +and Fe2 +permeated into the PAAS resin would form Fe3O4,thu s the swelling rate of the resin would be reduced. When the initial moisture content of the fine partical coal was 14% ~ 16% and the mixing time was 2 h,the weight mixing r atio between the resin and fine partical coal was 2%,the magnetic PAAS resin and PAAS resin all could reduce its moisture content below 9% and the application of the ma gnetic PAAS resin could have an obvious dewatering effect of the fine partical coal. The recycled utilization of the magnetic PAAS resin would not affect to the dewatering e ffect of the fine partical coal. At the initial period of the recycled utilizations,a Fe3O4 content of the magnetic PAAS resin would be obviously decreased with the recycle nu mber increased. With the recycle number further increased,the Fe3O4 lost quantity of the resin would not be high. After 15 cycles,the magnetic Fe3O4 content of the resin would still be 14. 13%.