Rare earth smelting method
sitting | 30 August 2010 01:47
The general use of rare earth ore beneficiation flotation method, and often accompanied by re-election, the composition of various combinations of magnetic beneficiation process.
Bayan Obo REE deposit in Inner Mongolia mines, iron carbonate, dolomite deposits, associated in the main component of rare earth iron ore minerals (except Bastnaesite, monazite, handbags there are several Nb, rare earth minerals). Recovery of 30% iron ore, rare earth oxide of about 5%. In the first major ore mines broken, transported by train to Baotou Iron and Steel Group's concentrator. Concentrator task is to Fe2O3 from 33% to 55% over the first cone ball mill grinding and classification, and then drum magnetic separator is elected 62 ~ 65% Fe2O3 an iron concentrate. The flotation and magnetic separation tailings continue to get more than 45% Fe2O3 with secondary iron concentrate. Bubble in the flotation of rare earth enriched in grade 10 ~ 15%. The enrichment can be elected by shaking 30% REO content of crude concentrates, mineral processing equipment and then processed, get REO60% or more of the rare earth concentrate.
There are two ways of rare earth smelting, or hydrometallurgy and pyrometallurgical.
Hydrometallurgy is a chemical and metallurgical methods, mostly in the solution of the whole process, solvent process, Authentic jerseys such as the decomposition of rare earth concentrates, rare earth oxides, rare earth compounds, a single rare earth separation and extraction process is by precipitation, crystallization, oxidation and reduction, solvent extraction, ion exchange and other chemical separation process. Application of the more common are the organic solvent extraction, which is high purity single industrial separation of rare earth elements common process. Hydrometallurgical process complex, high purity, the production of a broad product application area.
Pyrometallurgical process is simple, higher productivity. RE pyrometallurgical include Preparation of silicon thermal reduction of rare earth alloys, molten salt electrolysis Preparation of rare earth metals or alloys, metal thermal reduction, etc. Preparation of rare earth alloy. nfl jerseys Pyrometallurgical common feature is produced under high temperature conditions.
Decomposition of Rare Earth Concentrate
Rare Earth Rare Earth Concentrate in general was difficult to dissolve in water, carbonate, fluoride, phosphate, oxide or silicate form. Through various chemical changes must be converted into water-soluble rare earth or inorganic acid compounds, a dissolution, separation, purification, concentration, or burning and other processes, made all kinds of mixed rare earth compounds such as mixed rare earth chloride, as a separate product or single rare earth materials, wholesale nfl jerseys such as rare earth ore decomposition process, also known as pre-treatment.
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Two-dimensional green
sitting | 31 Juli 2010 09:20
The second level is the two-dimensional green. Green is the basis of two-dimensional implementation of the basic planning and construction before or after the completion of plant species through the planning of several trees or grass and shrub layer of mixed simple structure of the complex; plants are also the introduction of more varieties and a small number of native plant species. Chi straighteners Posterior transformation, such as jujube Road, the central part of the green belt site in the original composition of the green Indus poplar and pine mixed farm belt, has been opposed to the single dimension of the early greening the landscape better results.
Both one-dimensional or two-dimensional green green, mainly because of plant varieties to introduce, a small number of native plant species and inevitably lead to ecological chain defects and vulnerabilities, as its plants, animals and birds do not like eating fruit, its branches birds do not hi take the nest, so that the continuity and integrity of natural processes without the protection of the basic food chain. Ugg boots short Is mentioned before, the development and construction Maluan Bay case is actually an ecological chain. Now most of the green in two dimensions, the city's green space will inevitably lead to poor stability of ecological systems, the system is very fragile, ecological processes are not continuous, and ecological function degradation.
The third level is the three-dimensional green. Ugg classic tall Green is the first implementation of the three-dimensional small regional ecological planning (anti-planning), and stressed the green of biological diversity, native and natural, in order to achieve the greatest natural ecology of a small area, as large as possible to meet the basic requirements of the regional ecosystem .
Fourth level is the four-dimensional green. Four-dimensional Green is the first implementation of the larger regional ecological planning (anti-P), in the stressed green bio-diversity, local and natural environment of the same time, and stressed, and the surrounding natural ecosystems and harmonize with each other intermediation, complement each other to achieve large area of natural habitats, making a wider range of ecological processes relative continuity. This should be the content and requirements of ecological green.
This article discusses the Feng Wei to biodiversity and the establishment of bird corridor basic fundamental requirement is that the implementation of eco-green, Prada handbags to the establishment of maximum diversity of plant communities and the local nature of the relative integrity of natural processes and continuous , the formation of local animals and birds, the ecological chain of survival producer. It is like the proverb says: "planted plane trees, attracting Golden Phoenix." This is the basic strategy implementation.
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sitting | 31 Juli 2010 09:18If you can read this post, it means that the registration process was successful and that you can start blogging
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