Study of the strength of flocculated structures of polydispersed coal suspensions

Investigation of flocculation efficiency in treatment of wet gas treatment slime of ferroalloys production

“…Sedimentation of fine-grained slime by the flocculation method is complicated when the share of the fraction exceeds 40 μm and requires a higher expenditure, since the larger particles act as centers of aggregation. Dependences of the sedimentation rate of particles on the fraction greater than 40 μm are described in more detail in [11,12]. As a result of the chemical analysis (Table 4), it is established that the slime waters of wet gas treatment have an alkaline medium pH 8.5-10.5 and contain up to 26 g/l of salts accumulated during the circulation.…”

“…When flocculation is carried out, the sedimentation rate of the slime floccules is determined before and after mechanical influences according to the method of laboratory tests described in [11,12].…”

Investigation of the treatment efficiency of fine-dispersed slime of a water rotation cycle of a metallurgical enterprise

“…The reagents are added to a 500 ml slime sample with a solids concentration of 1331.5 mg/l in a variety of combinations and amounts. After mixing the samples, the rate of slime floccule sedimentation is determined before and after the mechanical influences according to the method of laboratory tests described in [14,15].…”

“…This is due to the multifactor process of aggregation of particles, which depends on the dispersion and solids concentration [14,15], pH, the content of dissolved salts [16], etc.…”

Studying patterns in the flocculation of sludges from wet gas treatment in metallurgical production

“…This relates to that the consumption of a flocculant depends on the total specific surface of particles. Studies [8,9] have shown that there are optimal conditions for effective aggregation. For coal sludge, they are the following: the concentration of solid within 10-30 g/l and the largeness of particles above 40 µm is over 20 %.…”