焦炭M40与M25的对比分析

本文介绍了济钢冶金焦炭的焦末含量，筛分组成及转鼓强度新标准的度用情况、对新、老标准进行了对比分析。     

八钢冶金焦炭质量检验采用新老标准的探究

阐述了八钢冶金焦炭质量检验采用新老标准之优劣。通过对比，分析了八钢冶金焦炭质量检验采用新标准的重要意义，并对八钢冶金焦炭质量检验采用新标准的可行性进行了探讨。     

沥青配比与焦炭质量之间的关系

 为了提高焦炭强度及粒度，利用40 kg试验焦炉研究了不同沥青添加方式（型煤中添加或直接添加）以及不同沥青添加比例对配煤焦炭质量的影响。研究结果表明，将沥青按照6%的比例配入型煤，随着型煤配比的逐步增加，焦炭的强度和粒度均明显改善，且与沥青比例存在很好的相关性；当配入30%比例的型煤时，型煤中沥青的配比与焦炭质量也存在较高的相关性；直接配加1.8%沥青比将同比例沥青加入型煤可得到冷强度和粒度组成更优的焦炭，但焦炭的热强度稍差。     

焦炭反应性及反应后强度预测与控制因素

焦炭反应性与反应后强度指标可以评定焦炭在高炉内的行为状态，引用美国内陆钢铁公司所使用的对焦炭反应强度预测方法，对梅山焦炭反应后强度进行了预测，该方法对梅山是适用的，而且较为准确。     

焦炭取样点对焦化厂焦炭机械强度指标的影响

本文根据冶金焦炭机械强度测定方法及不同取样点焦炭试样的对比试验，分析了由于取样点的不同，焦炭试样的裂纹率发生了变化，从而导致 了焦炭机械强度指标的变化。     

浅析焦炭焦末含量与焦炭机械强度的关系

通过试验找出焦末含量与焦炭机械强度的关系，焦炭机械强度高，焦末含量低；焦炭机械强度低，焦末含量高。     

优化炼焦配煤改善焦炭质量

首钢焦化厂4，5号焦炉炉龄老化，焦炭强度较低，通过系统研究、分析单种煤的炼焦性能，确定了提高焦炭强度的配煤方案，并经过配煤炼焦试验及生产攻关，解决了生产中的问题，并对炼焦煤的资源进行优化配置，尽量改善焦炭强度，满足炼铁需求。     

提高焦炭强度的研究与实践

在提高焦炭强度的过程中,通过模拟炼焦生产和设计的工业性试验研究,建立了选择煤种和预测焦炭反应后强度（CSR）的模型,并在生产实践中不断改进对炼焦用煤的要求,使焦炭强度不断提高。由模型和试验确定了焦炭CSR达到60％时煤的碱度指数必须小于0．161,焦炭CSR达到65％时煤的碱度指数必须小于0．121。     

稳定焦炭强度的措施

在论证稳定焦炭强度的重要性和分析影响焦炭强度因素的基础上 ,提出强化煤场煤质管理、制定新的炼焦煤质量标准、建立精煤主副供点制度、稳定主焦煤优质煤源基地等措施 ,使实施后的焦炭M40 %提高了 1 .2 % ,M10 %极差降低了 0 .3% .     

采用喷洒钝化剂方式改善焦炭热性能的实验研究

向焦炭表面喷洒钝化剂溶液可以改善焦炭热态强度.实验室研究了钝化剂溶液浓度和喷洒量两因素对焦炭反应性(CRI)、反应后强度(CSR)的影响规律.实验表明,钝化剂溶液浓度是主要影响因素,工业上实施该技术时,提高钝化剂溶液浓度就可以达到进一步改善焦炭热态性能的目的.     

董东矿沿空留巷切顶卸压对底板受力影响分析

以董东矿50107工作面为研究对象,通过数值模拟软件FLAC3D建立模型,对比分析窄矿柱、宽矿柱以及切顶沿空留巷情况下围岩及底板受力特征,确定切顶沿空留巷切顶对围岩的卸压作用。对比分析围岩受力情况,表明切顶沿空留巷卸压效果比较明显,对比分析围岩塑性区的底板破坏深度,表明有利于切顶沿空留巷卸压效果明显,切顶沿空留巷有很好的卸压效果,有利于矿山巷道围岩控制。     

加强烧结过程控制与稳定烧结矿质量

烧结矿的金属性能包括机械强度、氧化还原性和强度稳定性项指标,而影响这些因素种类繁多、错中复杂。介绍了烧结厂通过加强对烧结全过程的控制,稳定烧结矿金属质量的方法和效果。     

Simulation of the solidification of the melt in the Vanyukov furnace in the case of emergency stoppage

A mathematical model of the Vanyukov furnace, which makes it possible to predict the behavior of an object in the emergency operational mode (upon the disconnection of the oxygen supply) and develop an effective system of additional heating which damps the consequences of the emergency mode and lowers the costs for the renovation of the furnace operation, is created. It is shown how solidification upon cooling the furnace with time is simulated using the enthalpy and porosity method. The mathematical model is adopted for existing production conditions, which are weakly defined. The energy characteristics of the mode for the solidifying furnace bath, which ensures its holding for a long time in the ready state to rapid firing, are found. Thus, the problem of excessively expensive furnace firing after prolonged production stoppage is solved in the conjugated statement with a calculation of the heating system of the overbath space.     

抛光时间和表面粗糙度对硬度测试数据的影响

本文讨论抛光时间和表面粗糙度对金属材料布氏硬度测试数据的影响。试验结果指出,随着样品抛光时间的延长,HB值波浪式地变化;随着表面粗糙度的降低,HB值逐渐变小。分析指出,前者与抛光过程中磨面金属的加工硬化和随后的消失、及其循环往复有关;后者则是由表面粗糙度降低后,磨面上加工硬化层的减薄引起的。上述变化规律还受金属材料原始硬度的明显影响。     

Osteoma of the base of the tongue

A 14-year-old girl developed a firm mass at the base of the tongue. Computed tomography indicated marked density suggesting either a foreign body or bony tissue. A thyroid scan confirmed the presence of a normally sized and positioned gland. The mass was removed in toto and found to be an osteoma. This is the first report of a case in which the diagnosis of this rare developmental lesion of the tongue was achieved preoperatively based on clinical and radiologic information. This experience should lead to greater awareness of this entity in the future. Recognition of this entity in the pediatric age group is especially useful in avoiding misdiagnosis of other, potentially more aggressive types of tongue mass lesions. Our case demonstrates that it is possible to detect this entity using computed tomography. The dense calcification is truly characteristic of the tumor and may be relied upon to exclude alternative soft tissue mass lesions. While other forms of osseous and cartilagenous neoplasms, such as extraskeletal osteosarcoma and chondrosarcoma, have been reported arising in the tongue, their malignant nature should otherwise be readily apparent. Osteoma of the tongue is the favored diagnosis when mature bone tissue is imaged at the base of the tongue.     

Effect of the nanoparticle shape on the temperature of the onset of powder sintering

The sintering of needle and spherical particles is considered in terms of a diffusionless sintering model based on the idea that the sintering of nanoparticles smaller than 70 nm is determined by their fluctuational melting. It has been shown that the temperature of the onset of sintering of needle particles is lower than that of spherical particles of the same mass. According to calculations performed for copper nanopowders, the temperature of the onset of sintering of needle particles is 6% lower than that of spherical particles of the same mass.     

Injuries of the flexor tendons of the hand

Diagnosis of clear-cut severing of the two flexor tendons is simple and obvious. This is not true for isolated injury to a single tendon and for partial severing. In this case, careful clinical examination and routine surgical exploration of any wound with regard to the course of the flexor tendon is required. Surgery should aim at the least traumatic repair possible, followed by specialised rehabilitation directed by the surgeon. In the distal region, reinsertion into the bone is required. In other regions, suture consists of a the main suture with a continuous suture of the epitendineum. The region of the digital canal requires rigourous care due to its specific anatomy. The corollary to good surgical repair is rehabilitation, understood and complied with by the patient. Early mobilisation procedures are used predominantly in order to avoid the formation of postsurgical adherences.     

Some correlates of the empathy of the workers with the foreman.

Can a worker predict the perception of his own foreman? "The Test of Foreman-Worker Relationship was administered to 361 Israeli factory workers and their 51 foremen… . The prediction of the worker is more likely to succeed when the foreman's attention is oriented to the worker. Success is also more likely when the worker believes that the attention of the foreman is not oriented toward the worker… . Certain perceptions are easier to predict than others." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Formation of the structure of the weld metal upon the introduction of nanoparticles into the weld pool

The addition of nanodispersed powders to the area of welded joint is a promising control mechanism of controlling the properties of the weld metal. This article is aimed at determining the influence of TiN, TiCN, and WC nanoparticles (<100 nm) on the structure and the properties of the welded joint.     

Ultrastructure of the salivary bladder of the nine-banded armadillo

The nine-banded armadillo possesses a salivary bladder which is a dilated portion of the main duct of the submandibular gland at its origin. The wall of the bladder is composed of an epithelium, a submucosa and a thick coat of skeletal muscle. The ultrastructure of the epithelium reveals that it is complex and consists of three cell types: 1) principal cells, 2) light cells, and 3) basal cells. The general organization of the epithelium suggests that it is a transporting type of epithelium such as that found in the amphibian and reptilian and reptilian urinary bladders and the mammalian gall bladder. The submucosa is composed primarily of densely-packed collagen fibers. The skeletal muscle is very vascular and richly innervated.