In April 2012, the Chinese Machinery Industry Federation executive vice president Cai Wei-Tze admits that the major economic indicators are achieved steady growth in the first half of this year, but the future of the industry is also facing a number of challenges. this problem becomes more and more significant in the past year , magnetic separator device technology improven speed too fast will bring big impact to the small magnetic separator device manufacturers . The first big problem Chinese magnetic separator equipment industry faced is the cost of expenses rise faster, especially in finance charges and interest expense year-on-year high-speed growth and the growth rate of the monthly accelerate the trend. The various elements of cost hikes, magnetic separator equipment has become increasingly difficult operating under the pressure of oversupply. Round of price increases in raw material prices, financing costs, labor costs, at the same time, the overall price index of the magnetic separator equipment industry has always been not more than 102%, quite a few key products prices also continued downward. Finance costs of machinery industry in the first five months of this year grew about 40%, an increase of 28.33 percent over the same period last year.
Secondly, the market order decline rapidly, the finished goods inventory has increased rapidly. First May separator equipment machinery industry key enterprises ordering year-on-year increase of only 7.23%, showing the trend of continued decline, compared with the same period last year more than 30 percent of the growth rate, but also showed a significant downturn in. Future sales of machinery products in China the situation is more difficult. Finally, the magnetic separator equipment imports of machinery products continued to grow,this phenomenon has a huge impact on China's domestic market. Cai, vice president of the past two years, imports of machinery industry growth has been higher than the export growth rate of the magnetic separator equipment Machinery Industry Foreign Trade has continued deficit in the first half of this year, at the current trend, it is expected that the magnetic separator equipment machinery industry may be in reproduce the foreign trade deficit for the year after a lapse of six years.
"Twelfth Five-Year" period is to deepen reform, economic development transformation accelerating period, facing the above challenge, Chinese magnetic separator equipment machinery industry must push forward structural adjustment to accelerate the transformation and upgrading. increase the pace of "going out" efforts to expand exports, alleviate the problem of insufficient domestic orders.
Novel measures for evaluating a magnetic separator efficiency were developed.Effects of ore grade variability on magnetic separator efficiency was determined.An integrated model that outputs sustainability indicators was developed.Incorporated mineralogical attributes in assessing sustainability indicators.
Early integration of sustainability decisions and mineralogical attributes into the design of minerals processing units offers potential for reducing environmental impacts at mining and processing sites. The objective of this study is to demonstrate how the integration of sustainability indicators and mineralogical attributes could be achieved in developing an integrated modelling framework of a magnetic separator. A magnetic separator unit model based on existing literature was developed to include process stream mineralogical data and to output sustainability indicators. The overall sustainability of processing three ore types (low, medium and high grade iron ore) was evaluated using the developed model. Novel measures for evaluating magnetic separation (Grade Recovery Deviation Index (GRDI)) and energy efficiency (Rotational Energy Transfer Efficiency (RETE)) that incorporate the use of ore characteristics were developed in this study. These measures were used to calculate the separation and energy efficiency sustainability indicator ratings. In total eleven magnetic separator sustainability indicators were identified. Each indicator was assigned a weighting value out of 10 based on its importance. Of the 11 sustainability indicators identified; safety, reliability, Carbon dioxide (CO2) emissions, water use, noise and job creation ratings did not vary with changing mineralogical attributes of the feed ore. GRDI, RETE, electricity cost, particle emissions and waste generation ratings were observed to be dependent on the ore characteristics and therefore their values varied with different feed ore grades. The Analytic Hierarchy Process (AHP) and Weighted Sum Method (WSM) methods were applied to the sustainability indicator ratings and weightings to evaluate an overall sustainability cardinal score of processing a particular ore feed. Results of this study demonstrate the dependence of overall process sustainability indicators on feed ore mineralogical attributes. The results also provide an indication of the effect of ore variability (typical within a single deposit) on sustainability indicators.