منابع مشابه
Refining of Gold at the Rand Refinery
10.2 Historical Development In the early days of South African gold mining, the crude bullion produced had to be shipped to London for refining. The concept of a local refinery had been considered for several years before the first positive step was taken in 1909, when the Transvaal Chamber of Mines founded the Witwatersrand Co-operative Smelting Works, to treat the gold and silver bearing by-p...
متن کاملa new environmental chamber facility
Mexico City’s air pollution is a persistent and pervasive environmental problem that has imposed health and economic costs on society. With Mexico’s expenditures on controls calculated in several millions of pesos per year and slow progress toward compliance with air quality standards, a critical need exits for better and more effective abatement strategies. With the current Federal Environment...
متن کاملMicrostructure and Grain Refining Performance of a New Al-Ti-C Master Alloy (RESEARCH NOTE)
Control of microstructure parameters that affecting the Al-Ti-C master alloys grain refining efficiency is leading to improve the aluminum grain refinement. This study was an attempt to produce Al-Ti-C master alloys that provide these controlling factors with relying on the solute effect theory. The produced master alloys were examined by using scanning electron microscopy (SEM), energy-dispers...
متن کاملA New Hybrid Algorithm to Optimize Stochastic-fuzzy Capacitated Multi-Facility Location-allocation Problem
Facility location-allocation models are used in a widespread variety of applications to determine the number of required facility along with the relevant allocation process. In this paper, a new mathematical model for the capacitated multi-facility location-allocation problem with probabilistic customer's locations and fuzzy customer’s demands under the Hurwicz criterion is proposed. Thi...
متن کاملThe Uk Meis Facility : a New Future
The Medium Energy Ion Scattering facility at the Daresbury Laboratory, one of only a few such facilities in the world, has served the UK community since 1996. It provided a 50-400 keV ion beam and a very comprehensive experimental station where samples could be studied and the energies and angles of the scattered ions measured. It has now closed, but will be be relocated some 50 miles to the Un...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Gold Bulletin
سال: 1981
ISSN: 0017-1557,2190-7579
DOI: 10.1007/bf03214599