The MMER stipulates that for mine waste to be deposited in a natural, fish-bearing water body, the water body must be listed in Schedulenbsp2 of the Regulations, designating it as a tailings impoundment area TIA. In the context of these guidelines, a TIA is a natural water body frequented by fish into which tailings, waste rock, low-grade ore, overburden and any effluent that contains any concentration of the deleterious substances specified in the MMER, and of any pH, are disposed.
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The assessment should address environmental, technical and socio-economic aspects of all of the elements as described above for each alternative throughout the project life cycle. A comprehensive economic assessment of the alternatives is also required and should consider the full costs of each alternative throughout the project life cycle. This economic assessment should also consider all costs associated with any compensation agreements that are to be developed, including the habitat compensation plan associated with using the water body as a TIA.
This in itself introduces another level of complexity, in that decisions require judgement and cannot solely be based on technical merit. Two types of judgement are inherent in these decisions technical judgements regarding the likely consequences inherent in the decision, and value judgements regarding the importance or seriousness of those consequences.
To overcome these challenges tools have been developed to facilitate the decision making process and to make them as transparent and reproducible as practicable. The underlying principal is that a successful decision making tool will allow technical specialists to communicate essential technical considerations while allowing stakeholders to establish value judgements for the decision.
Different categories of MCDA methods are found, but the most relevant in the context of assessment of alternatives for mine waste disposal are value measurement models. In these models numerical scores are constructed to represent the degree to which one decision option may be preferred over another. MCDA is a valuable tool to aid decision making, which is a process which seeks to integrate objective measurement with value judgement and make explicit and manage subjectivity which is inherent in all decision making.
MAA consists of the development of a multiple accounts ledger, which is an explicit list of accounts and sub-accounts of the impacts from various alternatives and for each account indicator, which gives a clear understandable measurable description of those impacts. This is followed by a value-based decision process whereby indicator values are scored and weighted in a systematic transparent manner such that the value basis for the effects impacting them is readily apparent.
MAA is only part of a larger alternatives assessment process. This process, as it applies to proposed TIA in the context of these guidelines, is illustrated graphically in Figurenbsp1. Each of the seven steps of the process is described in greater detail in subsequent chapters of these guidelines. It should be noted that the MAA as presented in this guideline is slightly modified from the original method first described by Robertson and Shaw 1998, 1999. This modified approach makes the process more transparent and eliminates multiple levels of bias and subjectivity.
Materials. Unfortunately, selection of suitable dental cement for a specific clinical application has become increasingly complicated, even for the most experienced dentists. The purpose of this article is to review the currently existing dental cements and to help the dentists choose the most suitable materials for clinical applications. Keywords.
Environmental-friendly filter presses, developed and supplied by Tenova DELKOR ensure flexible operation, reliability and easy maintenance. Our filter presses are suitable for various dewatering applications, from mineral concentrates and tailings filtration, to polishing and electrolytic processes.
Jan 15, 2015nbsp018332Water transport is without a doubt the cheapest mode of transport, very suitable for heavy or bulky goods that need to be transported over long distances where time is not an important factor. For the transportation of perishable, light or valuable goods, air transport will be the most efficient mode of transport to use, although it is expensive.
The two-stage cycle presents gain in COP between 5.1 and 19.6 compared with the single-stage cycle based on the used refrigerant. From the obtained results, among all investigated refrigerants, cyclopentane is the most suitable refrigerant for the two cycles from the viewpoint of energy efficiency.
2.1 Alternatives Assessment Process. Selecting the most suitable mine waste disposal alternative from an environmental, technical and socio-economic perspective, and obtaining input and striving to achieve consensus on the decision from a broad stakeholder group is a complex undertaking.
Gold Ore Crusher, Mining Process, Gold, Gold Ore Rock Quarry Mineral rock quarry is a type of open-pit mine from which rock or minerals are extracted Know More. stone crusher citing criteria.ccspinegroveorg SAM Crushers,Jaw Crusher selection criteria for the most suitable crusher beneficiation of high ash non coking coal crusher ,.
Mini mineral flotaton cell for small scale ball mill plant. Mineral Processing EPC. Xinhai EPC provides services of sample test, mine design, equipment manufacture, etc. for clients, and solves the common problems in plant construction such as budget over run, schedule delays, unqualified equipment, unclear recovery benefit, disputes of the manufacturers, and unclear responsibility of after.
Metal ore has always been very popular with mine owners because of its great commercial value. But how to make a full distinction The following is to share with you the most popular metal ore separation process method and separation flow.
According to the above methods, it is concluded that ilmenite, limonite, hematite and iron ore are suitable for magnetic separation. Copper ore, lead ore, zinc ore and nickel are suitable for flotation separation. Tungsten, tin, gold and coal are suitable for gravity separation. White tungsten, tin, rutile, tantalum and niobium can be separated by electricity separation.
Mineral processing is the most important link in the whole production process of mineral products, and it is the key department in mining enterprises. In general, large mining enterprises are comprehensive mining, selection, the metallurgy of resource-based enterprises. The mineral processing process is completed in the concentrator. The following three basic processes are generally included.
Including raw ore raw coal crushing, screening, grinding, classification and other processes. The purpose of this process is to separate useful minerals from gangue mineral monomers and to separate various useful minerals from each other. In addition, this process also creates suitable conditions for the next step of mineral processing separation. According to the ore properties and separation needs, some concentrators are equipped with ore washing and pre-separation and throwing waste rock before the separation operation.nbsp.
The machines used in this process are jaw crusher, vibrating screen, ball mill and spiral separator.
The machines used in this process are spiral chute shaking table magnetic separator, float machine, and electric separator.
Including various concentrates, dehydration of tailings products, precipitation concentration of fine-grained materials, filtration, drying and washing water clarification cycle reuse.nbsp.
The machines used in this process are dryer, high-efficiency concentrator, and filter.
Grade refers to the ratio of metal or valuable ingredients to the total amount of the product. And it is one of the indexes to evaluate the quality of products. is usually used to represent the grade of raw ore, to represent the grade of concentrate and to represent the grade of tailings.
The ratio of the weight of the product to the total amount of raw ore is called the yield of the product. Expressed in .
Selection Criteria For Coal Crusher. Coal crusher selection criteria 2011 the most common types of crushers are the gyratory crusher jaw crusher for sale philippines loi iron ore machine more get price and support online coal crushers and silos design criteria brazil . Read the rest gt Tender Evaluation Using Weighted Criteria.
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