A review of methods for integrating risk management and multicriteria decision analysis in financial feasibility for post-coal-mining land usage selection

Ronyastra, I Made; Saw, Lip Huat; Low, Foon Siang

doi:10.1016/j.resourpol.2023.104260

Cited by 11 publications

(9 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calorific value is measured through discrete increments of energy pulses which cumulatively result into an overall gross calorific value (GCV, Mcal/ kg), therefore the (CV) integrates all the thermodynamic reactions occurring during the coal sample reduction-oxidation reactions (see Table 1) [47], [48], [49], [45], [46].The proximate analysis information of coal samples are imperative features which associates the coal mass composition, potential energy dissipation during combustion and the grindability principals surrounding hardness or fracture toughness, the young's modulus etc., of the coal type to the specific applications especially for industries like power station(s) and construction, steel manufactures [34], [50], [51], [52], [47], [48], [49]. The Hardgrove grindability index (HGI)…”

Section: Resultsmentioning

confidence: 99%

Coal Sample Preparation Strategy using the TENCAN GQM series Ball Milling device.

Gaesenngwe,

RAGHUPATRUNI,

MAMVURA

et al. 2024

Preprint

View full text Add to dashboard Cite

The application of Semi Autogenous Grinding strategy in mineral beneficiation engineering is well defined and established unit design method that is qualified for liberation of valuable of quality products from numerous rock ores of metals, coal seam, kimberlite ores etc. The TENCAN GQM series Ball Mill equipment was deployed throughout our investigation to investigate on optimum setting factors that are crucial and influential in achieving effective product quality outcome during coal beneficiation by milling operation. Therefore, a Semi-autogenous milling strategy was taken advantage of for the grinding activity that involved five (5) different coal samples and the optimum product stream in the particle size range between [−600μm, +38μm] was researched by an optimized procedure that syndicate three(3) control parameters being the {A − powder filling (fc), B − ball loading (JB) and C − residence time or grinding duration (t)}. Moreover, to understand the grinding kinetics and particle dynamics during interaction that yield a coal mass stream at desirable particle size relevant for target manufacturing companies is of profound interest in our study. Therefore, initially the acquired sample material was gently prepared using splitter equipment, sieve plates and the coal composition was analysed via Thermogravimetric machine and the Proximate results were acquired. To establish contrast amongst the samples, in compositional and coal formational morphology, hardness, and the relative abundance of occurring species were deployed as key factors that influenced the comminution patterns obtained from the trials. Samples that were initially collected assorted in particle sizes classification in a fully heterogenous format grouped as run-of-mine coals (−200mm), Cobbles (−75mm, +40mm), Nuts (−40mm, +25mm), Peas (−32mm, +14mm) and fines (−14mm), scaling via the laboratory sieve standard specifications. However, the acquired coal species were initially subjugated to a hardness testing using the Hardgrove grindability Index device that reported a variable coal grindability index value with material hardness increased from Nuts (60.37), Cobbles (64.58), ROM (66.84), Fines (66.99) to Peas (67.37) which are soft compared to other coal samples. Process engineers, researchers and students in different organizations studying metallurgy and coal beneficiation etc., must be informed about factors affecting coal material preparation innovations and the health-safety risk encounter by the mineral engineer personal during handling and processing. Moreover, production efficacy is significantly improved through adopting optimized model functions that accurately increase the product recovery at lower power rating for the cumulative production path hence relevantly reducing the cost(s) exacerbated by tedious and unnecessary design approaches.

show abstract

Section: Resultsmentioning

confidence: 99%

Coal Sample Preparation Strategy using the TENCAN GQM series Ball Milling device.

Gaesenngwe,

RAGHUPATRUNI,

MAMVURA

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…The calorific value is measured through discrete increments of energy pulses which cumulatively result into an overall gross calorific value (GCV, Mcal/ kg) therefore the (CV) integrates all the thermodynamic reactions occurring during the coal sample reduction-oxidation reactions (see Table 1) [44], [45], [46]. The proximate analysis information of coal samples are imperative features which associates the coal mass composition, potential energy dissipation during combustion and the grindability principals surrounding hardness or fracture toughness, the young's modulus etc., of the coal type to the specific applications especially for industries like power station(s) and construction, steel manufactures (see Figure 5) [34], [47], [48], [49]. The Hardgrove grindability index (HGI) imitated on the graphical construct of Figure 6 and Figure 7, explicitly show the coal hardness to be increasing rhythmically from Nuts (60.37), Cobbles (64.58), run-of-mine coal (66.84), Fines (66.99) and to Peas (67.37) having the highest (HGI) value and reporting as the softer material in the collection set.…”

Section: Discussionmentioning

confidence: 99%

Coal Sampe Preparation Strategy using the TENCAN GQM series Ball Milling device.

Gaesenngwe,

RAGHUPATRUNI,

MAMVURA

et al. 2024

Preprint

View full text Add to dashboard Cite

The application of Semi Autogenous Grinding strategy in mineral beneficiation engineering is well defined and established unit operation that is qualified for liberation of valuable final products from various rock ores of various kinds. The TENCAN GQM series Ball Mill equipment was deployed throughout our investigation to learn on optimum setting factors that are crucial in achieving effective product quality outcome during coal beneficiation. Therefore, a Semi-autogenous grinding methodology was deployed for grinding five (5) different coal samples into a product stream ranging in particle size from below [−600μm, +38μm] through an optimized procedure that syndicate three(3) control parameters being the {A − powder filling (fc), B − ball loading (JB) and C − residence time or grinding duration (t)}. Moreover, to analyse the grinding kinetics during interaction to produce coal mass recovery at desirable particle size specification relevant for specific manufacturing industry. However, initially the coal sample material was acquired and characterized via three spectroscopy techniques {x – ray diffraction (XRD), x – ray fluorescence (XRF), scanning electron microscopy (SEM)}, to establish contrast of each sample material in composition, morphology, hardness, and the relative abundance of occurring species entrenched within the coal structure (inorganic matter). Hence using the Proximate testing, Ultimate testing, and petrography analysis the examination was possible for each sample type collected. The coal samples that were initially collected were assorted in particle sizes classification and were grouped as run-of-mine coals (−200mm), Cobbles (−75mm, +40mm), Nuts (−40mm, +25mm), Peas (−32mm, +14mm) and fines (−14mm) according to our laboratory sieve specifications. However, the acquired coal species were initially subjugated to a hardness testing using the Hardgrove grindability Index device that reported a variable coal grindability index value with material hardness increased from Nuts (60.37), Cobbles (64.58), ROM (66.84), Fines (66.99) to Peas (67.37) which are relatively soft compared to other coal samples. Process engineers, researchers and students in different organizations studying metallurgy and coal beneficiation etc., must be informed about factors affecting coal material preparation innovations and the health-safety risk encounter by the mineral engineer personal during handling and processing. Moreover, production efficacy is significantly improved through adopting optimized model functions that accurately increase the product recovery at lower power rating for the cumulative production path hence relevantly reducing the cost(s) of exacerbated by tedious and unnecessary methods.

show abstract

“…Through material treatment and careful stoichiometric mixing with other chemicals, aggregates in concrete are mass-produced to achieve an overall material enhancement property such as high young's modulus, low speci c density, and high fracture toughness that can survive breakage at high temperatures and pressure uctuations (aerospace industries) [8], [13], [14]. Other bene ts of pulverized coal ash involve the replacement of the Natural Fine Aggregates (NFA) in cement because of its pozzolanic reactivity, coals ash material is processed into a potential replacement of cement in other construction and civil engineering industries.…”

Section: Introductionmentioning

confidence: 99%

“…Aamar Danish et al, added that from the total production of 750 million tons of coal ash liberated from coal combustion activities only about 120 million ton are utilized by manufacturing industries whereas 650 million tons of coal ash are dumped into land lls and are not utilized. Industries manufacturing pencil leads, engineered plastics and Carbon Fiber Reinforced Polymer material (CFRP), cosmetic products, tyre-and-road manufactures, Tar material that blend the road concrete aggregates are mostly a composited amalgamation of coal, therefore because coal products have an ever-increasing demand, greater emphasis must be devoted into sample preparation strategies that yield quality coal products which are satisfactory to customer speci cation for different industries and to avoid coal disposal [14]. Cenosphere constitutes a fraction of coal ash inclusion, and its unique properties are perfectly adopted for the synthesis of different materials, the recovery of valuable metals and in wastewater remediation to make coal-based columnar activated carbon product, low-grade graphene inks, graphene quantum dots, graphene enhanced-cement in ceramic industry because of their inherent properties such as low-density, high-water absorption, extreme compressive strength and effective insulation quali es [15].…”

Section: Introductionmentioning

confidence: 99%

Coal Structure Evaluation and Morphological Properties That Affect the Coal Usage in Industries.

Gaesenngwe,

Danha,

RAGHUPATRUNI

et al. 2024

Preprint

View full text Add to dashboard Cite

The contemporary research article is central to understanding coal structure evaluation and the morphological development impacting its utilization in different applications. Through Mineral Liberation Analysis (MLA) designs high content phyllosilicates minerals and swelling clay minerals were rationalized to provides a novel insight into enhanced coal beneficiation and the benefits of coal by-product re-utilization progressions that encourage safer environments and economic sustainability. This work commences with collection of five (5) different coal samples from the central district mine in Botswana and chemical characterization via Thermogravimetric coal analysis, x-ray fluorescence spectroscopy, x-ray diffraction, scanning electron microscopy and the Hardgrove Grindability Index testing that quantify coal material hardness and fracture toughness. The results showed sulfur and phosphorus inclusions in all samples complemented through sphalerite mineral phases (Zn, Fe)S and the coal morphology stimulated the material fracture toughness and hardness properties by influential mineral amalgams intrinsic to the Botswana central district coal maceral such as aluminum oxides (Al2O3), silicate (SiO2), calcites (CaO), Iron oxide (Fe2O3), potassium feldspars (K−AlSi3O8), albite (Na−AlSi3O8), and anorthite (Ca−Al2Si2O8) compounds in alkali feldspars which are predominantly group I and II carriers were perceived in substantial quantities. The coal industry has attracted much industrial attention by supply of high energy potent coal material and coal-by products to manufacturing foundations producing cement, ceramic tiles, paving bricks and material synthesis and will continue to supply other economic sectors in the conceivable future. Nevertheless, environmental concerns consequential to coal beneficiation are pressing issues requiring transdisciplinary innovations through investigations and technological practices that encourage the elimination of toxins and hazardous compounds from coal products therefore holistically generating sustainable and renewable resource for the future.

show abstract

A review of methods for integrating risk management and multicriteria decision analysis in financial feasibility for post-coal-mining land usage selection

Cited by 11 publications

References 63 publications

Coal Sample Preparation Strategy using the TENCAN GQM series Ball Milling device.

Coal Sample Preparation Strategy using the TENCAN GQM series Ball Milling device.

Coal Sampe Preparation Strategy using the TENCAN GQM series Ball Milling device.

Coal Structure Evaluation and Morphological Properties That Affect the Coal Usage in Industries.

Contact Info

Product

Resources

About