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Double-layered pellet (DLP) roasting is a novel pretreatment method for sulfur and arsenic-bearing gold concentrates. In this process, preparation of DLPs is a fundamental step which is required to produce DLPs with favorable mechanical strength and thermal stability. Studies were carried out to investigate the affecting factors and conditions on the preparation and properties of DLPs. The results show that moisture content has significant influence on DLPs preparation. With the increase of moisture content in the range of no more than 9.8%, drop resistance and compressive strength of green DLPs are raised and the pelletizing dynamics is improved accordingly. The optimum conditions are determined as moisture content of 9.8%, coating time of 14-16 min, drying temperature 〈80 ℃and drying gas velocity 〈1.2 m/s. When DLPs prepared under these conditions are roasted at 600 ℃ for 1 h, favorable removal and solidifying rates can be obtained, in which the removal rates of arsenic and sulfur are 94.38% and 82.55%, and the solidifying rates of arsenic and sulfur reach 99.62% and 99.79%, respectively. These results promise industrial application of DLP roasting. 相似文献
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人类的生活随着科学的发展,对色彩的使用也越来越考究,鞋子的色彩、形态也随着流行而变。人们对鞋子色彩的欣赏和追求无杰受到经济发展状况的制约和影响,从而也就影响到鞋毫色彩的流行。 相似文献
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人类的生活随着科学的发展,对色彩的使用也越来越考究,鞋子的色彩、形态也随着流行而变。人们对鞋子色彩的欣赏和追求无杰受到经济发展状况的制约和影响,从而也就影响到鞋毫色彩的流行。 相似文献
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本文以油草棚通道为例,研究了道路网络规划与土地利用协调发展的思路。通过改变路网结构,解决片区交通拥堵,增加片区可达度;通过优化道路线位,权衡控制与发展之间的取舍,最终实现路网结构与土地利用协调发展。 相似文献
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随着现代社会的发展及人们生活水平的提高,运动鞋的色彩搭配也有了新的变化。运动鞋的色彩是由其所使用材料本身反射的光所决定的,运动鞋设计运用颜色的搭配不仅能体现设计风格及流行趋势,还能使运动的观瞻性、娱乐性大大提高,同时体现运动本身活泼、动感和明快的特色。 相似文献
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在鞋类造型设计诸要素中,色彩是鞋类与人交流的最重要的因素之一,而流行色对运动鞋产品的设计、包装甚至终端卖场的陈列都起到了一定的导向作用,因此,在运动鞋配色过程中应合理运用流行色,避免为了追赶流行盲目使用. 相似文献
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