The composition of tailings particles in mines plays a key role in the flocculation settlement of slurries.To study the influence of coarse particle tailings(CPTs)on the flocculation settlement of tailings slurries(TS...The composition of tailings particles in mines plays a key role in the flocculation settlement of slurries.To study the influence of coarse particle tailings(CPTs)on the flocculation settlement of tailings slurries(TSs),static flocculent settling tests,scanning electron microscopy observations,and laser particle size analyses were conducted using the tailings obtained from a copper mine.The results demonstrate that(i)in the accelerated and free settling process,CPTs did not directly settle at the bottom of graduated cylinders;instead,they were netted by the flocculent structures(FSs)and settled together more quickly.The CPTs accelerate the rapid settlement of TSs;the acceleration effect is more obvious when the CPTs content is greater than 50 wt%.(ii)The most appropriate flocculant unit consumption(FUC)is 20 g·t-1,and no substantial increase is observed in the flocculant settling velocity with an increase in the flocculant because the effective FSs did not substantially change and thus did not lead to a notable increase in the settling velocity of the solid–liquid interface(SLI).(iii)In the effective settling space of the thickening facility,free water quickly flowed from the pores of FSs,which is reflected in the period from 0 to 1 min.展开更多
On the basis of flocculating settling experimentation on flotation waste coal in Wangfenggang coal preparation plant,influence of medical dosage and cationization (CD) of CPAM samples on coal slurry's flocculating...On the basis of flocculating settling experimentation on flotation waste coal in Wangfenggang coal preparation plant,influence of medical dosage and cationization (CD) of CPAM samples on coal slurry's flocculating effect was studied,difference of flocculating effect on coal slurry among different categories of polyacrylamide was discussed.Experi- mental results show that when the dosage of flocculant reaches 2-4 g/m^3 flotation waste, and the CD of CPAM is 5%,flocculating effect is the best,light transmittance of super- natant liquor reaches 93%.Taking 3types of sample CPAM,PAM and PHP,which formula weight vary a little,to deal with the same concn of coal slurry,when medicine dosage is 3 g/m^3,flocculating effect of CPAM is the best,light transmittance of supernatant liquor reaches 92%.展开更多
The flocculation effect of the Phanerochaete chrysosporium on the coal slurry were studied by orthogonal experimental method in this study.The results of research show that the P.chrysosporium has a good effect on flo...The flocculation effect of the Phanerochaete chrysosporium on the coal slurry were studied by orthogonal experimental method in this study.The results of research show that the P.chrysosporium has a good effect on flocculating coal slurry.The optimum combination of the experimental is the P.chrysosporium,which is cultured in 2 days,mixed with 2 mL coagulant and 2 mL broth.The flocculant is a broken liquid with pH value of 6.The hightest flocculation ratio is 93.5%.The result of FTIR shows that the biological extraction of P.chrysosporium contains a lot of acidic polysaccharides that has the effect on flocculation.Microbial flocculant molecules and particles of coal slurry could be flocculated by‘‘absorption bridge’’.展开更多
基金financially supported by the National Key R&D Program of China(No.2017YFC0804601)the National Natural Science Foundation of China(Nos.51804134and 51804135)+2 种基金the Natural Science Foundation of Jiangxi Province(No.20181BAB216013)the Program of Qingjiang Excellent Young Talents,Jiangxi University of Science and Technologythe Doctoral Startup Fund of Jiangxi University of Science and Technology(No.jxxjbs17011)。
文摘The composition of tailings particles in mines plays a key role in the flocculation settlement of slurries.To study the influence of coarse particle tailings(CPTs)on the flocculation settlement of tailings slurries(TSs),static flocculent settling tests,scanning electron microscopy observations,and laser particle size analyses were conducted using the tailings obtained from a copper mine.The results demonstrate that(i)in the accelerated and free settling process,CPTs did not directly settle at the bottom of graduated cylinders;instead,they were netted by the flocculent structures(FSs)and settled together more quickly.The CPTs accelerate the rapid settlement of TSs;the acceleration effect is more obvious when the CPTs content is greater than 50 wt%.(ii)The most appropriate flocculant unit consumption(FUC)is 20 g·t-1,and no substantial increase is observed in the flocculant settling velocity with an increase in the flocculant because the effective FSs did not substantially change and thus did not lead to a notable increase in the settling velocity of the solid–liquid interface(SLI).(iii)In the effective settling space of the thickening facility,free water quickly flowed from the pores of FSs,which is reflected in the period from 0 to 1 min.
基金the Hi-Tech Research and Development Program of Huainan City(2005zd008)
文摘On the basis of flocculating settling experimentation on flotation waste coal in Wangfenggang coal preparation plant,influence of medical dosage and cationization (CD) of CPAM samples on coal slurry's flocculating effect was studied,difference of flocculating effect on coal slurry among different categories of polyacrylamide was discussed.Experi- mental results show that when the dosage of flocculant reaches 2-4 g/m^3 flotation waste, and the CD of CPAM is 5%,flocculating effect is the best,light transmittance of super- natant liquor reaches 93%.Taking 3types of sample CPAM,PAM and PHP,which formula weight vary a little,to deal with the same concn of coal slurry,when medicine dosage is 3 g/m^3,flocculating effect of CPAM is the best,light transmittance of supernatant liquor reaches 92%.
基金fnancial support provided by the National Natural Science Foundation of China(No.51274012)for this work is gratefully acknowledged
文摘The flocculation effect of the Phanerochaete chrysosporium on the coal slurry were studied by orthogonal experimental method in this study.The results of research show that the P.chrysosporium has a good effect on flocculating coal slurry.The optimum combination of the experimental is the P.chrysosporium,which is cultured in 2 days,mixed with 2 mL coagulant and 2 mL broth.The flocculant is a broken liquid with pH value of 6.The hightest flocculation ratio is 93.5%.The result of FTIR shows that the biological extraction of P.chrysosporium contains a lot of acidic polysaccharides that has the effect on flocculation.Microbial flocculant molecules and particles of coal slurry could be flocculated by‘‘absorption bridge’’.
