Paste Thickening of Fine Coal Refuse

Patil, D. P.; Honaker, R.Q.; Parekh, B.K.

doi:10.1080/07349340701638848

Cited by 12 publications

(8 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The development of TT and TP has therefore been an emerging breakthrough associated with tailings management. The implementation of such technologies is now very feasible due to their maturity (Verburg, 2001, Patil et al, 2007, Mudd et al, 2013, Jones and Boger, 2012, Fourie, 2012, Fourie, 2009, Chryss et al, 2012, Boger, 2000. Furthermore, understanding tailings flow behaviour (rheology) is key to successful implementation of TT and TP assuming that tailings reactivity is not a concern.…”

Section: Objectivesmentioning

confidence: 97%

A framework for a sustainable approach to mine tailings management: disposal strategies

Adiansyah

John

Vink

et al. 2015

Journal of Cleaner Production

298

View full text Add to dashboard Cite

The aim of mine tailings management strategy is to protect the environment and humans from risks associated with mine tailings. It seems inevitable that future production from lower grade ores in mines will increase, generating a higher tonnage of tailings. Approximately 14 billion tonnes of tailings were produced globally by the mining industry in 2010. The need for a comprehensive framework for mine tailings management (including dewatering) that promotes sustainable development is therefore becoming increasingly recognised by the mining industry. In this paper, we review existing frameworks for tailings management and propose an improved framework that considers key sustainable development pillars: technological, economic, environmental, policy, and social aspects. This framework will be able to guide the mining sector to choose its mine tailings management strategy based on sustainable development concepts. It incorporates a range of tools for determining trade-offs inherent in different tailings management methods during operation and throughout the Life of Mine (LOM); these include Life Cycle Assessment (LCA), Net Present Value (NPV), Hierarchy System Model (HSM), and Decision Analysis. In particular, this proposed recognises the highly casespecific of tailings management by explicitly integrating physicochemical characterisation of tailings properties as a first step. In future, the framework could be expanded through integration of reuse/recycle principles of industrial symbiosis.

show abstract

Section: Objectivesmentioning

confidence: 97%

A framework for a sustainable approach to mine tailings management: disposal strategies

Adiansyah

John

Vink

et al. 2015

Journal of Cleaner Production

298

View full text Add to dashboard Cite

show abstract

“…This demonstrates the significant difference between the settling behaviors of these two types of particles that makes thickening of coal refuse a difficult task. Recently, for thickening of coal tailings, Deep Cone Thickeners have shown to produce an underflow containing about 50% to 60% solids [11]. Deep cone thickeners have also been used for the treatment of alumina and copper tailings [12].…”

Section: S Banisi and M Yahyaeimentioning

confidence: 99%

Feed Dilution-Based Design of a Thickener for Refuse Slurry of a Coal Preparation Plant

Banisi

Yahyaei

2008

International Journal of Coal Preparation and Utilization

View full text Add to dashboard Cite

Thickening is the most widely applied dewatering technique in mineral processing. Thickeners are used to increase the concentration of suspensions by sedimentation, accompanied by the release of a clear liquid. As the particles get finer the thickening process encounters difficulty due to a significant change in the particles settling behavior. The batch settling tests of coal refuse of a coal washing plant that contained 91% particles smaller than 38 mm and 0.6% coarser than 75 mm showed that the optimum feed percent solids that provided highest flux (solids handling capacity) was 4%. The flux of the pulp with the plant solids concentration (i.e., 10% by weight) was 60% lower than that of the pulp with 4% solids. A thickener with a diameter of 22 m based on the dilution of feed from solids concentration of 10% to 4% was designed. Monitoring of the thickener performance for a period of one month in the plant indicated that an average feed rate of 25t=h (dry solids) with solids concentration of 10% could be thickened to an underflow concentration of 26.5% with a clear water overflow. It was found that the key component of the successful operation of the thickener is the dilution of the feed, without dilution the overflow loses its clarity and the system ceases to operate under predetermined conditions.Based on the results of established CFD (Computational Fluid Dynamics) studies, a feeding system that efficiently dissipated the energy of the incoming flow and a staged flocculant addition regime were utilized in the design and operation of the thickener.

show abstract

“…They obtained the lowest turbidity values for different flocculant types. Patil et al [13] investigated the paste thickening of fine coal refuse using a deep cone thickener. They concluded that deep cone thickeners can produce an underflow containing about 50% by weight solids.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Particle Size, pH, and Flocculant Dosage on the Gel Point, Effective Solid Stress, and Thickener Performance of a Coal-Washing Plant

Rahimi

Abdollahzadeh

Rezai

2014

International Journal of Coal Preparation and Utilization

View full text Add to dashboard Cite

A common way to separate the solid from the liquid in high volumes is using thickeners. Since, the amount of water consumption in the mineral-and coal-processing plant is high, water management needs to optimize the input variables and thickener performance. In this study, the effect of particle size, pH, and flocculant dosage on the parameters (gel point and effective solid stress) of mathematical model for the sedimentation and thickening has been investigated. The gel point and effective solid stress was measured using different batch settling and batch centrifuge tests, respectively. The results showed that in the case of nonflocculated suspension, the gel point increased with lowering of pH, however, in the case of flocculated suspension the gel point decreased with lowering of pH. The gel point also increased with increasing flocculant dosage in certain pH values for the two flocculated and nonflocculated fractions. In the case of nonflocculated suspension, the gel points for d 80 ¼ 275 mm and d 80 ¼ 125 mm were equal at a certain pH value but in the case of the flocculated suspension the gel point for d 80 ¼ 275 mm was higher than that of d 80 ¼ 125 mm at a given pH value. Likewise, the results showed that effective solid stress decreased with increasing gel point and settling rate.

show abstract

Paste Thickening of Fine Coal Refuse

Cited by 12 publications

References 5 publications

A framework for a sustainable approach to mine tailings management: disposal strategies

A framework for a sustainable approach to mine tailings management: disposal strategies

Feed Dilution-Based Design of a Thickener for Refuse Slurry of a Coal Preparation Plant

The Effect of Particle Size, pH, and Flocculant Dosage on the Gel Point, Effective Solid Stress, and Thickener Performance of a Coal-Washing Plant

Contact Info

Product

Resources

About