共查询到20条相似文献,搜索用时 140 毫秒
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1990年4月5日至7日,冶金部矿山司在长沙主持鉴定和评议了9项锰矿科研成果,其中,选矿1项,工艺矿物学7项,烧结1项。这次鉴定的8项科研成果是:建水锰矿平台矿区氧化锰选矿扩大试验报告;斗南锰矿工艺矿物学研究;我国9个大中型碳酸锰矿床锰矿物及其集合体成分的研究; 相似文献
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贵州团溪锰矿磁选配矿烧结含硫量控制的探讨 总被引:2,自引:2,他引:0
在没有降硫工艺设施的团溪锰矿,能否将烧结锰矿的含硫量控制在允许值之内,对此进行了探讨。结果表明,只要加强磁选工艺技术管理,严格磁选工艺操作条件,认真搞好配矿烧结,烧结矿的含硫量能够控制在允许值之内。 相似文献
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建水锰矿资源综合利用取得明显成效1996年,云南建水锰矿认真开展学邯钢、增效益活动,努力将资源的综合利用作为促进企业经济增长方式由粗放型向集约型转变的一条根本措施,依靠科技进步促进了资源综合利用的全面开展,使年利用废弃尾矿达到9000多吨,取得了较好... 相似文献
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依靠科技进步提高经济效益谭红翔(云南建水锰矿,云南,654302)云南建水锰矿坚持邓小平同志提出的“科学技术是第一生产力”的观点,充分发挥国有大中型企业的人才、技术优势,不断推进技术进步,使得全矿科技工作取得了较好的成绩.“八五”期间各项技术经济指标... 相似文献
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氧化锰矿直接浸出制备硫酸锰的几个影响因素 总被引:7,自引:2,他引:7
根据云南建水锰矿一年多来的生产实践,就氧化锰矿直接浸出制备硫酸锰工业生产的几个影响因素,进行了探讨并提出了提高浸出回收率的措施。 相似文献
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锰矿烧绪点火器结瘤,是锰矿烧结工艺有别于铁矿烧结的一个特殊现象,也是锰矿烧结生产中急待解决的一个问题。本文将对锰烧结瘤的情况、特点和成因、以及防止结瘤的可能途径,作一粗浅分析,以期为促进锰烧生产和锰烧点火器的结构改进,提供一些有益的佐证。 相似文献
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Abhijit Saha Subhas Chandra Mondal 《Transactions of the Indian Institute of Metals》2017,70(6):1491-1502
Hardfacing is one of the most productive and practical approaches to cut down operating expense on the maintenance front and at the same time to improve performance and reliability of the equipment. Presence of nano-particles in hard facing materials significantly enhances surface area to volume ratio and accordingly it improves conductivity, hardness, heat and wear resistant properties. The main objective of this paper is to efficiently apply manual metal arc welding process for hardfacing of nano-structure based electrode. The most important process variables that have been considered in conducting the experiments are welding current, arc voltage and welding speed; while the response parameters include weld bead width, reinforcement and bead hardness, respectively. Taguchi’s (L25) orthogonal array has been used to perform the experimental runs. A combination of grey relational analysis coupled with principal component analysis has been applied to identify optimal settings of the input process parameters. Moreover, the exact input and output welding parameters have been examined with the help of genetic algorithm. Finally, confirmation test has also been carried out with the optimal welding process parameters to validate the experiment result. 相似文献
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利用水模拟研究连铸操作工艺对板坯结晶器液面涡流的影响规律。在实验室进行了不同工艺参数下的试验,分析不同工艺参数对涡流的影响。结果表明,结晶器液面形成涡流的原因主要来自于表面液流的湍动性所导致的水口两侧表面液流动能瞬时的不对称,以及浇注工艺所导致的水口两侧出流及表面液流不对称。在结晶器液面,涡流出现形式分为水口一侧单涡流,一侧双涡流和对角双涡流等情况。上述现象与水口周围液流流态有关,涡流的"强度"(文中用涡流直径和长度表征)以及其出现的频度均随表面液流的动量增大而增加,加大水口浸入深度或增大出流角度有利于减小涡流强度和出现频度。 相似文献
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The accuracy of mathematical modelling is strongly influenced by the boundary conditions assumed. A shape rolling mill was instrumented to provide on-line temperature measurements during hot rolling of steels. An inverse heat conduction technique was used to convert the measurement data to surface heat fluxes and heat transfer coefficients. The heat transfer coefficient or heat flux could then be used as the necessary boundary condition for the computation of temperature field in the entire roll and workpiece by means of conventional heat transfer analysis. The heat transfer phenomena involved and the influence of the major operating parameters on the heat transfer results have also been discussed. Finally, the paper has shown that the numerical evaluation procedure adopted has at least the same influence on the results as the accuracy of temperature sensors and the properness of experiment design. 相似文献
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Control of Equiaxed Crystal Ratio of High Carbon Steel Billets by Circular Seam Cooling Nozzle 总被引:1,自引:0,他引:1
A circular seam cooling nozzle and its online control system have been developed to reduce the center segregation in high carbon steel billets by decreasing the superheat of the molten steel and improving the equiaxed crystal ratio based on the numerical results. An industrial experiment has been carried out on a 150 mm×150 mm caster to investigate the effect of the circular seam cooling nozzle on the superheat removal of the molten steel. The results show that the circular seam cooling nozzle can be used to control the casting temperature in a closed loop control system. The online control system can be effectively adapted to the variation of operating parameters. The casting lasts about 4 h and about 400 t steel is successfully produced in a continuous operation. The removal of about 14 ℃ superheat and the improvement of approximate 10% equiaxed crystal ratio can be achieved by the newly developed circular seam cooling nozzle. 相似文献
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