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根据盘山发电厂2台机组两年来的运行经验及超临界机组的特点,围绕如何减小热态启动中热应力,加快热启动速度问题介绍了选择冲转参数的依据,以满足汽温与缸温相匹配为原则,讨论了机炉协调操作应注意的问题。 相似文献
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云南某磷矿选矿厂生产规模为200万t/a,为了提高企业核心竞争力需要采取扩能降耗的措施。首先通过小型试验的手段进行研究,发现通过减小入磨粒度和采用钢球作为磨矿介质可以改善磨矿效果,提高磨矿效率;然后通过工业试验进行验证,也证实了减小筛孔尺寸后,改变了磨矿分级系统中各产品的粒度分布,在维持钢球作为磨矿介质的条件下,磨矿产能提高了28.80%。磨矿产品经过浮选后获得了P_2O_5品位为29.81%,P_2O_5回收率为85.53%,MgO含量为1.32%的磷精矿,浮选指标良好且能够满足生产要求。对现场碎磨流程进行技改后,磨矿单耗降低了17.64%,节能降耗效果显著。 相似文献
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研究了一类特殊类型的超图分解问题,即λ重完全二部3-一致超图λKn,n((3))的紧6圈分解,记作Sλ(3,C6((3)),n,n).首先,通过计算得到其分解存在的必要条件为λn2(n-1)≡0(mod 6),且n≥3.故对于λ=1的情况,只需考虑n≡0,3,4,7 (mod 6);对于λ=3的情况,只需考虑n≡5,8(mod 6).然后,建立递归构造,找到递归构造中所需要的小阶数设计,针对阶数比较大的超图,可以由一些阶数较小的设计递归生成.最后得到Sλ(3,C6((3)),n,n)存在的必要条件也是充分的,即存在Sλ(3,C6((3)),n,n)当且仅当λn2(n-1)≡0 (mod 6),且n≥3. 相似文献
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Study of extended experiments at a scale of 1.0 t/d on scrubbing tailings, containing low content of magnesium and high content of silicon, that were generated from a phosphate mine in Yunnan Province. By comparing recleaning of tailings that were generated from roughing and cleaning with respective recleaning of tailings that were generated from roughing and cleaning, it was found that the latter could obtain good benefication indexes. A flotation concentrate containing 29.81% P2O5 with a recovery of 80.09% was obtained and economic efficiency of 105.52 millions will be achieved. The flotation process was stable and the utilization of stockpiled tailings was effectively realized. The mine will obtain a good economic benefit. 相似文献
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