Experimental Study on Sedimentation and …
Based on the inflection points observed in above test results, the sedimentation curve and inflection point curves of the dredged slurry are depicted in Fig. 11. It is indicated that water content inflection curve (B), density inflection curve (B') and velocity inflection curve (B'') were almost completely overlapped.
Gain Improved Tank Slurry Agitation via Swirl Flow Technology
It is not uncommon that slurry tanks experience reliability issues, which lead to maintenance shutdowns. Sedimentation accumulation due to solids settling on the tank bottom can result in agitator bogging; and scale formation often causes increased sedimentation buildup, due to solids being "glued" together into large lumps by …
Increased agitation reliability for slurry suspension in …
Sedimentation tests. The sedimentation depth averaged around the periphery at the tank wall, denoted as H B, was visually recorded at the equilibrium state as the speed, N, was gradually reduced from a high speed at which the solids …
One-Dimensional Model for Sedimentation and
Sedimentation and consolidation of soil particles in dredged slurry is very complex since there are no explicit rules. A modified experiment method - multilayer extraction sampling - is adopted in ...
(PDF) THICKENER DESIGN, CONTROL AND DEVELOPMENT …
combine in the design, contr ol and operation of a modern thick ener. This paper does not seek to. provide all the answers in thi ckener design and control, but hopes to give the reader a greater ...
Multiphase slurry flow regimes and its pipeline …
The slurry utilized in tailing backfilling technology of metal mine is one of typical incompressible multiphase fluid [17].As Fig. 2 shows, in the paste backfilling procedure, the tailings slurry is prepared by thickening, stirring the initial tailings fine/coarse particles, water, and chemical agents (flocculants, superplasticizer, etc.) [18], …
Sedimentation Behavior of Organic, Inorganic, and …
DOI: 10.1061/(ASCE)MT.1943-5533.0003758 Corpus ID: 234820128; Sedimentation Behavior of Organic, Inorganic, and Composite Flocculant-Treated Waste Slurry from Construction Works @article{Wang2021SedimentationBO, title={Sedimentation Behavior of Organic, Inorganic, and Composite Flocculant-Treated …
(PDF) A Statistical Model for Slurry Thickening
This paper developed a statistical model to predict field performance of a selected metal mine slurry using laboratory test data. Results of sedimentation- consolidation tests were fitted using ...
Using electrical conductivity to determine particle sedimentation …
For flowing slurry, this effect of sedimentation is minimised, and at the same time, charge transfer caused by particle-to-particle interfacial collisions imparts higher charge transfer; hence, a maximum of 1.7 %, 2.6 %, 1.9 % improvement of conductivity for 5 wt%, 10 wt%, 15 wt% slurries are observed 30 min of slurry flow.
Sedimentation in Coal-Water Slurry Pipelining | SpringerLink
Abstract. In this chapter we present an overview of recent investigations on the problem of sedimentation related to the pipelining of a coal-water slurry. The two main aspects of the problem are the determination of the sedimentation velocity and the understanding and modeling of the dynamics of the sedimentation bed that accumulates on the ...
Thickening of mine waste slurries
Parametric Modeling of Polymer-Assisted Slurry Sedimentation for Nickel Laterite Mining ... The optimum polymer parameters for an im- proved sedimentation of the selected slurry were found to be T ...
Synergistic enhancement of coal slurry water sedimentation …
Fig. 2 shows the flow chart of the experiment. First, PDMDAAC solution (1% mass fraction) with PAM solution (0.05%) was prepared. In the sedimentation experiment, the chemical was added to the coal slurry water with a pipetting gun, the measuring cylinder was tumbled up and down 10 times to well mix the contents, and the settling …
Geotechnical Characterization and Sedimentation …
Results indicate that due to changes in material characteristics, sedimentation behavior of laterite slurries is improved during the metal extraction …
Optimization of flocculation and settling parameters of tailings slurry …
The optimal static flocculation sedimentation parameters are as follows: the full tailings slurry concentration is 20%, the flocculant unit consumption is 10 g/t and the flocculant solution ...
Aqueous nickel slurry, method for preparing the same and …
An aqueous nickel slurry of the present invention comprises water, nickel fine powder provided ... (available from Thermo Haake) at a shear rate of 100/sec and a sedimentation velocity of 0.08 mm/min as measured by TurbiScan MA 2000 (available from Eko Instruments Trading Co., Ltd.). Moreover, it was found that the aqueous nickel …
Improved dewatering of nickel laterite ore slurries using
Sedimentation rates are affected by the fineness of the grind, the clay fraction, non-clay fine materials and the chemistry of the pore water [4]. ... the optimal parameters achieved provide valuable information for the flocculation settling process of unclassified Nickel tailings slurry in Jinchuan Nickel Deposit, which will contribute to ...
Electronical Conductivity Improvement of Carbon-Based Slurry …
In this work, the novel idea of using a carbon to improve slurry electrode systems' electronic and ionic conductivities is introduced and experimentally investigated. Slurries with different mass loadings of 5, 10, and 15 wt % are prepared using steam-activated Norit (from peat) as an active charge carrier with 1 M H2SO4 and distilled water for specifically …
The effect of solid content on the rheological …
Poor slurry stability can cause sedimentation of the slurry components and weakening of the overall performance and production efficiency of the coated electrode, which are detrimental to the quality of the battery. …
Beginners guide to thickeners
Beginners guide to thickeners. Thickening is a process where a slurry or solid-liquid mixture is separated to a dense slurry containing most of the solids and an overflow of essentially clear water …
Experimental study on sedimentation and consolidation of …
Sedimentation and consolidation of dredged slurry is very complex in practice. A new Multilayer Extraction Sampling (MES) method was developed in this study to better understand the underlying law of sedimentation and consolidation of soil particles in slurries. Comparing with previous methods, the advantages of this method include: (1) …
Parametric Modeling of Polymer-Assisted Slurry Sedimentation for Nickel
The increasing world nickel demand coupled with depleting laterite reserves throughout the globe requires that metal extraction be extended to the entire ore body. To improve process throughput, the sedimentation behaviour of blended laterite slurries is modified in gravity thickeners using synthetic polymers. Based on 2^4 factorial design, ionic type, charge …
Study on the Separation and Sedimentation Performance of …
This paper investigates slurry sedimentation through laboratory sedimentation tests, considering the effects of the marine environment. ... The metals, especially nickel, could be easily reduced ...
Assessment of rheological and sedimentation characteristics of …
Likewise, the sedimentation properties of CTB slurry was studied by picking polyacrylamide (PAM) as flocculant. Results showed that: (1) CTB's slump reduced with growing SC and c/t values when SC was kept constant. (2) The viscosity and shear stress increased with increasing SC values, signifying a linear link between shear stress …
Sedimentation Behavior of Flocculant-Treated Dredged Slurry …
Geotextile tubes have offered a cost-effective and convenient solution for the treatment of dredged slurry in recent years. Despite their benefits, the dewatering process of this method remains cumbersome and time-consuming. The incorporation of flocculants into dredged slurries has been shown to mitigate the clogging of geotextile tubes, …
Temperature-dependent rheological behavior of cathode slurry …
The rheological property of cathode slurry is commonly influenced by coating speed and mixing temperature, thereby leading to its storage stability and coating uniformity. In this study, the effect of the temperature of slurry on the rheological behaviors is investigated under various shear rates and temperatures based on steady and …
Improved viscous slurry agitation for minerals processing
For modeling low viscosity slurry, water and sands or glass particles were typically used; sometimes a low concentration of polymer was added to adjust the liquid viscosity, e.g. to a few times that of the water viscosity. 2.3. Measurement of sedimentation status and stagnant fillet
A review on slurry bioreactors for bioremediation of soils …
Slurry bioreactor technology is an engineered complex that generally comprises four parts: installations for polluted soil handling and conditioning, the bioreactor battery itself, installations for treated soil handling and disposal, and ancillary equipment for treatment of process by-streams [18, 20].The SB can be classified as batch, semi …
A Renewable Sedimentary Slurry Battery: Preliminary Study …
We call this state as suspension slurry. The sedimentation process of the particles occurs under the gravity effect when the flow rate of the slurry slows down or stops consequently (Figure 1 D). As a result, the sedimentary slurry is formed again. ... For zinc-nickel secondary battery which used aqueous electrolyte, deep charge/discharge in ...
Particle sedimentation monitoring in high-concentration …
The particle sedimentation rate in the high-concentration slurry with the aqueous glycerol solution (η = 0.068 Pa · s) and a particle volume fraction on the order of 0.3 was determined to be 1.58 ± 0.66 μ m · min − 1 on the basis of the obtained image sequences for 24.9 h. In-situ observation provides a large amount of information about ...
Sedimentation of the fine-grained dredged slurry in the …
The sedimentation type of TJ slurry is dominated by the initial water content regardless of -ion type/concentration or pH value. When w0 < 400%, TJ slurry shows consolidation sedimentation without form-ing visible flocculation; in this case, the slurry settlement is predominantly the result of consolidation.
