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1.
本论述了国内浮选机的应用情况,详细介绍了XJ,BF,BS—K,CLF,GF,CHF—X,HCC,JJF,KYF,LCH—X,SF,XCF,BSF,xHF,XHB系列浮选机的结构、特点,在此基础上提出今后浮选机研究与发展方向。  相似文献   

2.
对于下面的18种元素,在临界状态测定和收集了它们的溶化的的Sn中的热力学和相位平衡数据,这些元素分别是:AL,Ca,Ce,Co,Cr,Cu,Fe,H,Mg,Mo,Na,Ni,O,P,S,Se,Si和Ti。对于剩余吉布斯能量的二元和三元数据进行了最优化,并用温度和成分的函数形式给了多项式,对于某些溶质来说,这些最优化的表达式在整个成分范围(0≤XSn≤1)内都是有效的,而在其它的一些情况下,这些表达  相似文献   

3.
钢背青铜玻璃复合板,是以钢背为强化基体,以青铜玻璃复合材料的工作层,经烧结,轧制,机加等工艺制成的复合板和滑板,轴瓦等,其摩擦系数低,磨损率低,可在有无润滑,高温,粉尘,污水等各种环境下工作,也适合在低载荷,高转速,重载荷,低转速下工作,通过几年的实践证明,具有明显的经济效益,是一种科技含量高,有着广泛的实用价值的新材料。  相似文献   

4.
武学龙 《酒钢科技》2002,(2):31-39,8
我国是水泥生产消费大国,水泥工业已成为国家重要的经济支柱,水泥总量过剩,但结构不合理,水泥工业结构调整的目的是实现“由大变强,靠新出强”的战略手段,控制总量,淘汰落后,发展新型干法,甘肃水泥工业相对落后,立窑水泥占70%以上,但近年来新型干法发展迅速,宏达公司特定的地理,经济位置和小规模经营,制约了企业发展,只有立足本地,依托酒钢这个原料和销售市场,扩大生产规模,调整产品结构,大量利用工业废渣,降低成本,扩大水泥市场份额,实现跨越式发展,企业才有发展前途。  相似文献   

5.
稀土元素在铁基溶液中的热力学   总被引:9,自引:0,他引:9  
本文用多种高温平衡实验方法,研究得到1300-1600℃内铈,钇,镧,钕,钐稀土单一元素在铁基溶液中分别与硫,氧,硫+氧,碳,氮,锑,锡,铅,磷,铜,钛,铌,钒元素共30个三系和四元系的相平衡及热力学性质与温度的关系,并依据Fe-RE相图计算了这5个稀土元素与铁的二元溶液中的热力学性质。  相似文献   

6.
今年来,江铜集团在“做大,做强”的进程中,顺应世界经济发展的潮流,适时调整思路,转变观念,落实科学发展观,转变经济增长方式,大力发展循环经济,努力探索企业可持续发展之路。江铜集团在发展循环经济中,精密结合企业实际,存分利用现有资源,有计划地稳步向前发展,取得了低投入,高产出,效益最大化和人文环境和谐的优异成绩。中央新闻媒体一直十分关注江铜集团循环经济的发展,  相似文献   

7.
《中国钼业》2006,30(5):23-23
本发明涉及一种催化剂以及该催化剂在苯与过氧化氢合成苯酚反应中的应用,该催化剂的载体是一种改性的天然红色粘土,催化剂的活性组分可以为钒,锰,铜,钨,钼,铬,钴,铁等的氧化物中的一种或几种组成。其制备方法:将金属的草酸盐、硝酸盐或者该金属的酸式铵盐溶于溶剂,加入载体,浸渍,烘干,研磨,高温分解,煅烧成品。该催化剂的载体来源丰富,催化剂价格低廉,制备工艺过程简单,可应用于苯与过氧化氢合成苯酚的反应。  相似文献   

8.
计量器具在钢铁研究所是组织科研、检验、大生产过程的最基本工具,承担着所有工序参数准确,可靠的传递,使用计算机可对计量器具进行科学的,严密的,有效的组织,使用,检定,统一管理,该文阐述的管理方法,构思新颖,程序严密,操作灵活,易于移位,具有推广使用价值。  相似文献   

9.
稀土钼制品的替代性及其应用   总被引:2,自引:1,他引:1  
张燕红 《稀有金属》2003,27(1):69-71
与纯钼制品相比,稀土钼制品具有更优越的性能,价格较低,同时也避免了钍元素的放射性污染,完全具有替代性而广泛应用于冶金,机械,石油,化工,国防,航空,电子等领域,本文着重介绍了稀土钼制品的生产工艺和良好的替代性,并对其应用前景进行了分析。  相似文献   

10.
锂在国民经济各部门有着广泛的用途,如高能电池,超轻合金,耐磨合金等,锂及锂化物一些工业产品生产中作为添加剂,可明显改善了工艺条件及产品性能,所以锂在工业市场上经常供不应求,本文研究提出了用硫酸盐法从锂云母中制取碳酸锂的工艺流程,获得了回收率高,产品质量好,能耗低,产能高,成本低,渣量小,无污染,社会效益显著的良好效果。  相似文献   

11.
露天开采是矿山开采的一种重要方式,对于开采有比较积极的作用和影响。本文以安徽省某地区露采矿山为例,对矿山开采时出现的问题提出解决方法,并对露天采矿矿山地质环境治理与恢复进行分析策略。  相似文献   

12.
从企业贯标的实际出发,就如何发挥内审员在质量体系建立与运行中的作用进行探讨,并就如何建设一支切合企业实际的内审员骨干队伍提出了积极的建议。  相似文献   

13.
A pericentric inversion of an X chromosome [46,X,inv(X)(p11q28] with no detectable deletions was ascertained by amniocentesis for prenatal diagnosis in a 42-year-old woman. No defintive counsel could be offered as such an inversion had not been previously reported. At 1 year, the infant appears normal. These data and the review of other recently published karyotypes suggest an absence of a somatic position effect in the human X chromosome and possible biases of ascertainment or possible alternative karyotypic interpretations of some previously reported inv(X) cases.  相似文献   

14.
It has been established under laboratory conditions that there is an increase in the β-C2S content and a decrease in the α′-C2S content when the nepheline cake is held for τ = 0–30 min in a temperature range of 630–680°C. Specifically, industrial tests on a fire grate cooler confirmed the effect that the duration of holding the cake at T = 630–680°C exerts on its quality; an increase in τ from 1.6 to 4.9 min led to an increase in the β-C2S content by 3% and an increase in the α′-C2S content by 4%.  相似文献   

15.
Study 1 assessed participants' theories regarding various issues previously used in overattribution bias studies. Results suggest that personality plays an important role in explaining positions on these issues. Studies 2, 3, and 4 indicated that the overattribution bias is contingent on the explanatory applicability of accessible concepts for a particular issue. Study 2 used an issue associated with personality; an overattribution bias emerged only when personality was stressed in the instructions. Study 3 used an issue associated with a sociological theory; this time, an overattribution bias appeared only when a socioeconomic concept was emphasized. Essays were not circulated in Studies 2 and 3, but were in Study 4. Again, the bias appeared only when an applicable (personality) concept was activated. These results, which extend the range of applicability, are discussed within the framework of the social judgability approach. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   

16.
The muscular tissue of the vestibular folds was investigated in plastinated serial sections of 32 normal adult larynges. Three muscular systems could be distinguished. A posterolateral muscle layer was found to be developed at the lateral margin of the posterior part of the vestibular fold. Its fibers extended in a sagittal direction, and their contraction probably resulted in an adduction of the entire tissue of the vestibular fold towards the midline. Within the anterior part of the vestibular fold, an anterolateral muscle sheet was seen to attach to the thyroid cartilage. An anteromedial muscular system consisted of scattered groups of muscle fibers situated medially and dorsally to the laryngeal ventricle and saccule. These fibers were presumed to exert a downward pressure on the vestibular folds, in addition to an adductor function. According to clinical experience, adductor movements of the vestibular folds can be trained, even in cases with a recurrent laryngeal nerve lesion, in order to produce a compensatory voice. Thus, the muscles of the vestibular folds are probably innervated by the superior laryngeal nerve.  相似文献   

17.
Fractures of the proximal femur are, more than ever, an important challenge in the field of traumatology. The Gamma nail, a combination of advantages of the sliding screw with the intramedullary nail, represents an efficient technique in the management of these fractures. A series of 224 fractures of the proximal femur in which this nail was used is reported. The average age of the patients was 79.2 years. The mean healing time was 68.2 days in 99.4% of the cases. The incidence of perioperative complications was 10.3% showing that, in most of the cases, the complications occurred because of poor technique. Postoperative complications occurred with an incidence of 14.1%. Seven cases of migration of a proximal screw, six shaft fractures, and one broken nail were the most important complications. The device allowed for early mobilization and full weightbearing of the affected hip regardless of the type of fracture. With adequate surgical technique and experience, the advantages of the Gamma nail increases as the complication rate diminishes.  相似文献   

18.
Effect of unilateral (one leg) and bilateral (two legs) sciatectomy was studied on certain serum constituents in the male frog over a period of 3 weeks. The level of creatine kinase, acid and alkaline phosphatases, urea, glucose and proteins increased initially following sciatectomy and decreased subsequently from day 14 onwards, the per cent change being more pronounced in case of bilaterally sciatectomized frogs. The present results indicate an increase in the rate of deamination of proteins in the liver, an impairment in the transportation processes across the cell membrane and an increase in cellular lysosomal activity on sciatectomy suggesting a change either in the amount or in the rate of various enzyme reactions. It is concluded that sciatectomy induces alterations in general metabolic activities and the functional state of the animal. Altered values of various serum constituents thus permit to speculate analysis of the factor that may be contributing to the atrophic processes and the wasting of the muscle fibres known to set in the denervated muscle.  相似文献   

19.
Reaction of the Fe3+ form of the oxygen-carrying protein leghaemoglobin (MetLb), derived from the root nodules of lupins, with H2O2 is shown to generate, in addition to an iron (IV)-oxo (ferryl) species, a globin radical. This radical has been detected by EPR spectroscopy and is analogous to the species previously observed with the soybean protein. Analysis of the hyperfine coupling constants and g value of the EPR signal, together with computer simulations and the similarity of the observed spectra of that detected with the soybean form suggest that this species is also a tyrosine-derived phenoxyl radical; this species is believed to arise via an electron-transfer process within the protein with an electron being transferred from the tyrosine residue to an initially-generated Compound-1-type species. Comparison of the protein sequences and structures of the two proteins show that there is only one conserved tyrosine residue (at position 133 in the soybean and 138 in the lupin); this is believed to be the site of the phenoxyl radical. The lupin phenoxyl radical reacts with added water-soluble antioxidants and reducing agents which result in repair of the radical; this may be an important protective mechanism in vivo. Analysis of molecular models of the protein structures is in accord with both the assignment of the radical to this conserved tyrosine residue and the observed radical reactivity.  相似文献   

20.
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