包钢5~#高炉炉况失常处理中负荷变化的分析

包钢5#高炉由于使用,外购焦碳其水分波动大,质量差,导致炉温大凉后连续崩料.炉况失常,处理过程中负荷大幅度下降,文中分析了炉况处理的过程,着重分析探讨了炉况失常处理过程中负荷的变化.     

大高炉失常恢复操作工艺探讨

介绍大高炉一次炉况严重失常的现象和处理过程，分析炉况失常的原因，并从炉况恢复过程不同阶段的得失探讨炉况恢复操作工艺。     

柳钢2000m~3高炉炉况失常技术分析

总结柳钢2000 m~3高炉(3、4号高炉)2016-05炉况失常的原因和处理过程。分析认为:原燃料质量的波动,特别是入炉S负荷的上升与碱负荷升高及炉渣碱度偏高等是引起炉况波动的主要原因;在处理高炉炉况失常时,风口中小套大量漏水加剧了炉缸堆积。介绍实施的集中加净焦提高炉温、疏松边缘为主的布料制度、降低炉渣碱度、集中堵部分风口等逐步恢复风量,使高炉生产逐步恢复正常的措施。     

柳钢高炉炉况失常处理方法及特点

总结了柳钢高炉近年来多次出现的炉况失常及其处理过程的经验教训，提出了在处理失常炉况过程中减少反复、快速恢复的措施。     

2000m~3高炉炉况严重失常处理实践与分析

介绍了南钢2000m3高炉一次炉况严重失常的炉况、现象、诱因、处理过程、方法、分析和教训     

莱钢1#1880m3高炉炉况失常与处理

莱钢1#1 880 m^3高炉检修后恢复过程中出现炉况失常,主要原因是设备故障多、布料矩阵不合理、渣中Al2O3升高及操作失误等。通过采取热洗炉、改善原燃料质量、调整布料矩阵等措施使炉况恢复正常。此次炉况处理过程表明,长时间休后加负荷不宜过快,生产中要确保布料参数准确,并应加强对原燃料的管理。     

同钢450m~3高炉高〔Ti〕铁、高(Al_2O_3)渣炉况失常分析与处理

对4号高炉炉况失常的原因、机理及处理过程进行了总结分析,认为铁中〔Ti〕、渣中(Al2O3)异常升高是炉况失常的主要原因,采用锰矿和净焦洗炉、堵风口恢复、疏松中心气流、控制炉温、碱度、炉外出净渣铁等措施,取得了较好效果。     

邯宝3200m3高炉炉缸中心堆积的处理

详细分析了邯钢公司3200 m3高炉2011年3月份定修后炉况失常的原因,由于中心喉管严重磨损导致中心掉料,逐渐加重中心负荷,直至形成炉缸中心堆积,最终导致3月17日复风困难,炉况完全失常.通过分析炉况失常后的处理方法及过程,总结出了锰矿洗炉、中心焦引透气流、加循环焦等处理炉缸中心堆积的处理措施.     

衡钢高炉炉况严重失常的处理

对衡钢高炉炉况严重失常的形成原因及处理过程进行了分析总结。通过制定合理的事故处理方案、利用 风口出铁、掌握好捅风口的时机及控制合适的操作参数,保证了炉况顺行,为炉况恢复奠定了良好的基础。     

安钢1号高炉炉况失常原因及处理

对安钢1号高炉炉况失常原因及处理进行了总结分析。1号高炉发生炉况失常事故的主要原因,一是焦炭质量大幅度劣化,二是入炉碱金属和锌负荷持续超标,三是高炉操作上未能及时调整应对。通过制订科学合理的炉况恢复方案,并采取改善原燃料条件、降低碱锌负荷、适当配加洗炉剂、优化高炉操作等措施,炉况逐渐恢复正常,各项经济技术指标不断得到优化。     

Serotonin, the superior colliculus, and grooming behavior in cats with neocortical lesions.

Previous studies of cats with pontile lesions indicate that a serotonergic deficit exists in the superior colliculi and that this deficit is involved in an abnormal grooming behavior. Cats with frontal neocortical lesions exhibit the same serotonergic deficit and abnormal grooming behavior. The present study with 20 male cats established that the serotonergic deficit is involved in mediation of the abnormal grooming behavior in cats with frontal neocortical lesions. Microinjections of 5-hydroxytryptophan (5-HTP) and 5-hydroxytryptamine (5-HT) into the superior colliculi abolished or significantly reduced the abnormal behavior in Ss with frontal neocortical lesions, whereas no effects of 5-HTP were observed after injections into the superior colliculi, into the tegmentum beneath the superior colliculi, or into the medial dorsal nucleus rostral to the superior colliculi. Tryptophan, noradrenaline, and gamma-aminobutyric acid had no effect on abnormal behavior when injected into the superior colliculi. Evidence implicating a serotonergic deficit in the mediation of abnormal behavior was obtained by systemic injections: The behavior was abolished with 5-HTP in Ss with frontal neocortical lesions and in adrenalectomized Ss previously treated with para-chlorophenylalanine. Findings also demonstrate that the abnormal behavior is induced by frontal neocortical lesions and not by more caudal lesions of the cortex. (16 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Similarities in the physiological bases of an abnormal grooming behavior in thyroidectomized cats and in cats with lesions of the central nervous system.

A study with 41 adult male cats showed that thyroidectomized cats displayed a dissociation of the appetitive and consummatory components of grooming behavior when the body surface was tactually stimulated, an abnormal behavior that also occurs in cats with pontile or frontal neocortical lesions. Systemic administration of 5-hydroxytryptophan (5-HTP) abolished the abnormal behavior, whereas dihydroxyphenylalanine administration did not, and para-chlorophenylalanine (PCPA) administration induced the abnormal grooming behavior in thyroidectomized cats that were not displaying the abnormal behavior because of spontaneous seasonal reversions. Microinjections of 5-HTP or serotonin into the superior colliculi also abolished the abnormal grooming behavior in thyroidectomized cats. Lesions of the superior colliculi prevented the development of the abnormal behavior after thyroidectomy, even with PCPA treatment. These results in thyroidectomized cats parallel the behavioral effects observed in cats with pontile or frontal neocortical lesions. (17 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Association of abnormal uterine discharge with new intramammary infection in the early postpartum period in multiparous dairy cows

The association of abnormal uterine discharge with the development of intramammary infection (IMI) was studied in 62 multiparous Holstein cows during the nonlactating period and from lactation days 3 through 30. Duplicate milk samples were obtained from each mammary gland at approximately day 30 of the nonlactating period. Milk samples for bacteriologic culture also were obtained from each gland from all cows at the end of the previous lactation, at parturition, and on a minimum of 7 additional dates during the first 30 days of lactation. Beginning after parturition and continuing once weekly for 4 weeks, each cow was examined, using a vaginal speculum to visually estimate the quantity of abnormal uterine discharge in the vagina. Additionally, uterine swab specimens were obtained for aerobic bacteriologic culture. Cows were allotted to groups on the basis of the maximal amount of abnormal uterine discharge observed at any 1 of the 4 examinations. Cows in group 1 had normal discharge or < 30 ml of abnormal discharge; in group 2, > or = to 30 ml of abnormal discharge, observed only on examination by vaginal speculum; and in group 3, > or = to 30 ml of abnormal discharge visible externally. A difference was not detected in the development of new IMI in the nonlactating period between cows that subsequently developed uterine discharge and those that did not. Although significant differences were not found, a tendency for lactating cows with abnormal uterine discharge to be at increased risk for developing new IMI was observed.(ABSTRACT TRUNCATED AT 250 WORDS)     

Comparison of the sensitivity of early versus delayed imaging with Tc-99m HMPAO WBC in children with inflammatory bowel disease

The difference in sensitivity of early imaging at 30 minutes after injection of Tc-99m HMPAO WBC versus delayed imaging at 2 or 3 hours for depiction of active inflammation in children with inflammatory bowel disease was established. The charts of 220 children who had early (30-minute) and delayed (2 or 3 hours) imaging performed for evaluation of inflammatory bowel disease were reviewed. There were 107 boys and 113 girls (average age, 12 years; median, 13 years). The bowel was divided into eight segments (with the total for all patients being 3,520) graded on a scale of 0 to 6 (with reference points in the iliac crest and liver). Any grade > or = 1 was abnormal. The uptake in each segment was summed. One hundred and twenty-two studies were abnormal (55%). The average uptake in the early images was 5.1 +/- 0.41 and that in the late images was 9.3 +/- 0.64. The Friedman nonparametric test of comparison of rank was significant at the 0.001 level. One hundred and five patients had abnormal studies at 30 minutes (88%). An additional 12% of patients had abnormal studies only on the late images. There were 245 abnormal segments at 30 minutes and 413 abnormal segments at 2 or 3 hours. When the uptake was analyzed segment by segment, 62 patients (52%) had abnormal segments at 30 minutes but also had additional abnormal segments at 3 hours. Sensitivity of Tc-99m HMPAO WBC imaging was significantly improved when late imaging was performed.     

Abnormal liver function tests in the primary care setting

Results of laboratory tests ordered during a primary care encounter may reveal findings of abnormal liver function tests, including elevated liver enzymes, hyperbilirubinemia, hypoalbuminemia or abnormal coagulation tests. The object of this study was to describe the spectrum of these liver function test (LFT) abnormalities in primary care. Results of all laboratory tests ordered during 10 months in an urban primary care clinic were retrospectively reviewed and the medical charts of patients with abnormal LFTs were studied. In 217/1088 (20%) of the tests at least 1 LFT abnormality was found in 156 patients. New diagnoses were made in 104 patients. The main diagnostic groups were: non-alcoholic fatty liver changes, Gilbert's disease, acute infectious hepatitis, alcoholic liver disease and cirrhosis and hepatotoxic drug injury. In 60 patients the physician classified the abnormality as negligible and not associated with significant disease. However, an abnormal test that had been ordered for evaluation of a specific complaint, was indeed likely to represent significant disease (X2 = 29.5, p < 0.001). We conclude that finding abnormalities in liver function tests is common in the primary care clinic but does not often indicate significant liver disease.     

Cardiopulmonary resuscitation and do-not-resuscitate orders in the nursing home

Spinal cord injury (SCI), as well as other neuromuscular disorders, not only results in osteopenia but also induces various patterns of osseous, articular, and soft tissue alterations. In the spinal column, a variety of abnormalities occur. To evaluate the magnitude of discrepancy of bone densitometry results caused by spondylopathy in SCI patients, we analyzed anteroposterior (AP) radiographs of the lumbar spine [obtained within 1 month of dual energy X-ray absorptiometry (DXA)] in 116 SCI patients for various manifestations of spondylopathy, and matched the result to each vertebral level (L1, 2, 3, 4). The dataset was stratified by individual vertebra (totally 463 vertebrae) as valid (no demonstrable other abnormal density on plain radiograph except osteopenia), abnormal without, and abnormal with hardware. The influence of spondylopathy on bone densitometry results was determined by the analysis of variance (ANOVA) and post hoc analysis. Our results showed that 227 (49%) vertebrae were abnormal. Significant elevation (15%, 15%, 18%, 20%; P < 0.001-P < 0.05) of bone mineral density (BMD; g/cm2) was observed at all levels (L1, 2, 3, 4, respectively), particularly at those abnormal vertebrae without hardware compared with valid (no other abnormal density on radiograph except osteopenia (Table 1). The L4 level was most severely affected. We concluded that in SCI patients, owing to various secondary progressive skeletal abnormalities, particularly neuropathic spondylopathy, can have strongly and significantly elevated vertebral bone densitometry results, which can obscure underlying osteoporosis, leading to misinterpretation and underestimation of fracture risk. DXA, although characterized by improving spatial resolution, cannot replace radiography in establishing the magnitude of this skeletal pathology. Therefore, determination of bone density in this region with corresponding plain radiographs is highly recommended.     

Up-regulation of rho A and rho-kinase mRNAs in the rat myometrium during pregnancy

We have recently demonstrated that some tenascin (TN) gene-knockout mice display abnormal behaviors, and that these abnormal behaviors stem from a low level of dopamine transmission in the brain. In the present study, we elucidated that tyrosine hydroxylase (TH) activity in the frontal cortex, striatum, and hippocampus of TN-knockout mice which showed abnormal behavior was significantly decreased. Also, the TH mRNA level of the midbrain was decreased by 43% in these animals compared with values for wild-type mice. These results suggest that the low dopamine turnover rate in some areas of the brain of TN-knockout mice accompanied by motor defects is due, at least in part, to the reduction in TH activity caused by diminished TH mRNA expression, and that TN-knockout mice exhibit abnormal behaviors in the presence of low levels of TH-gene expression.     

Mobile string-like thrombus on the calcified aortic valve in cardioembolic stroke--a case report

The calcified aortic valve has been associated with being a possible source of emboli in cardioembolic stroke. However, thrombus on the calcified aortic valve has not been identified with two-dimensional echocardiography. A seventy-two-year-old woman with calcified aortic stenosis was admitted with brain embolism. She had not previously received any platelet antiaggregant or anticoagulant. At admission, two-dimensional echocardiography demonstrated a mobile string-like abnormal echo attached to the calcified aortic valve, which showed regression and enlargement repeatedly during admission. No symptoms or clinical data suggested infective endocarditis or nonbacterial thrombotic endocarditis. After commencement of antiplatelet therapy, the abnormal echo regressed and disappeared. She continued to take the medication for seven months and then discontinued. Three months later, she developed recurrence of stroke, and an abnormal echo on the calcified aortic valve was again detected by two-dimensional echocardiography. The authors believe that the abnormal echo on the calcified aortic valve was thrombus and that it was the embolic source. Calcified aortic valve may thus be a causative lesion for mobile string-like thrombus. Two-dimensional echocardiography should be performed repeatedly in patients with calcified aortic valve and brain embolism.     

Psychosocial evaluation on the correct recollection of periodic medical checkups of workers. 2. Long-term change in the recalled results of medical checkups

A self-administered questionnaire study of 333 workers (male 253, female 80) in a manufacturing company was carried out one month after informing the workers of the results of their medical checkups in 1993. The questionnaire included several items such as recalled abnormal findings of health examination and ways of overcoming the abnormal findings, recalled results of their medical checkups in 1992, self-confidence in their recollection of the results, and the usefulness of medical checkups. The following were investigated: the relationship between actual as well as recalled results of medical checkups in 1992 and the recollection of them after one year, the effects of examinations after medical checkups in 1992 on their recollection of the checkup results after one year, the effects of actual as well as recalled 1992 checkup results on the recollection of the results one month after informing the workers of the results of their medical checkups in 1993, assurance of correct recollection of the results, the relationship between the usefulness of medical checkups, explanation of abnormal findings and the percentage of correct answers to the results of medical checkups in 1993 one month after informing the workers of their results. It was found that the percentage of correct answers to the results after one year was significantly lower than that after one month in 1992. The rate decreased with the increase in the number of abnormal items in medical checkups. Moreover, the rate also decreased when the results were abnormal. Further examinations in addition to the medical checkups influenced their recollection somewhat after one year. The results that the workers still remembered in 1992 had a stronger effect on their recalling the results one month after informing them in 1993 than the actual results in 1992. The workers' confidence in their recollection of the results was untrustworthy in the same way as their recollection of the results, and they were not able to maintain the recollection of the correct results, although many of the workers realized the usefulness of the medical checkups. Our results suggest that explanation of abnormal medical findings in 1993 was effective because the percentage of partial concordance between actual and recalled results was much higher in the workers who received the explanation than in the workers who did not receive it.