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酒钢本部烧结机燃料经济应用研究
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作者 汪晶 熊涛 +1 位作者 李晓峰 保善山 《甘肃冶金》 2023年第3期17-20,共4页
以酒钢本部1#、2#烧结机固体燃料消耗为背景,通过对现场实际重点参数控制、主要设备摸索研究,深入分析了固体燃料消耗偏高的几点主要影响因素。阐述了酒钢烧结在现有配料基础上,经技术改进及参数控制调整后的固体燃料消耗应用,结果表明... 以酒钢本部1#、2#烧结机固体燃料消耗为背景,通过对现场实际重点参数控制、主要设备摸索研究,深入分析了固体燃料消耗偏高的几点主要影响因素。阐述了酒钢烧结在现有配料基础上,经技术改进及参数控制调整后的固体燃料消耗应用,结果表明:在烧结机主管温度控制技术、松料器改造、平料器改型提升、环冷机热废气“回热风”等技术调整后,烧结固体燃料消耗明显下降,达到合理使用能源的目的,同时为提质降耗及高炉生铁成本降低奠定坚实基础。 展开更多
关键词 固体燃料消耗 主管温度控制 松料器 平料器 铁矿烧结
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Vitamin D Deficiency and Pseudofractures in Child-Bearing Egyptian Women: Successful Medical Treatment Helps to Avoid Fractures and Surgical Interference
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作者 Ghada M. El-Sagheer Elwy Soliman +1 位作者 Ahlam M. Abdulla Mohamed Ali 《Open Journal of Endocrine and Metabolic Diseases》 2016年第8期183-191,共9页
Background: Recent evidence for the effects of vitamin D and recognition of the high prevalence of its deficiency has increased the interest in it. Vitamin D-sub nutrition may contribute to the risk of a wide range of... Background: Recent evidence for the effects of vitamin D and recognition of the high prevalence of its deficiency has increased the interest in it. Vitamin D-sub nutrition may contribute to the risk of a wide range of disorders. Methods: The females in the child-bearing period attending the endocrinology and orthopedic out-patient clinics complaining of pain and/or tenderness at the groin were evaluated. Patients with chronic metabolic or skeletal illness, primary hyperparathyroidism, and patients receiving drugs that interfere with bone mineral metabolisms were excluded. One hundred accepted and consented to participation in the study. All the participants were subjected to full history taking, clinical evaluation, laboratory investigations including serum Ca, Ph, PTH, ALP, TSH, F T4, F T3, Cortisol level, and 25(OH)D level. Plain X-ray was done for the regions of bony tenderness. The subjects were divided into 2 groups based on the presence or absence of pseudo-fractures (looser zones). They were treated and followed up till normalization of the laboratory parameters and healing of the looser zones. Results: The mean age for patients was 30.45 ± 5.8, their mean 25(OH) vitamin D level was 14.7 ± 5.9 ng/ml, the mean PTH was 195.7 ± 162.6, and looser zones were evident in the X-rays of 34 patients. The serum 25(OH)D showed significant negative correlations with veiling, parity, localized hip pain, and tenderness, ALP, PTH, but, a significant positive correlation with sun exposure, dairy products consumption, vitamin D supplementation, and serum calcium levels. The independent factors associated with hypovitaminosis D were the lack of sun exposure, lack of vitamin D supplementation, and the presence of pseudo- fracture (p ≤ 0.009, 0.038, and 0.001 respectively). No surgery was required in any of our patients. Conclusions: Vitamin D deficiency is common in our region. The main risk factors are decreased sun exposure, low dairy products consumption, and lack of vitamin D supplementation. Successful medical treatment may be helpful to satisfy the patient, avoid true fracture and further major surgical treatments. 展开更多
关键词 Hypovitaminosis D OSTEOMALACIA looser Zone
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HF蚀刻+逐层抛光法表征熔石英亚表面损伤层深度 被引量:8
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作者 杨明红 赵元安 +1 位作者 易葵 邵建达 《中国激光》 EI CAS CSCD 北大核心 2012年第3期88-93,共6页
脆性材料的研磨过程会不可避免地产生亚表面损伤层,对亚表面损伤层的表征和抑制一直是获得高激光损伤阈值熔石英光学元件的关注热点。回顾了几种亚表面有损表征技术,通过实验重新评价了蚀刻表面峰谷(PV)粗糙度法的可行性,分析了其误差... 脆性材料的研磨过程会不可避免地产生亚表面损伤层,对亚表面损伤层的表征和抑制一直是获得高激光损伤阈值熔石英光学元件的关注热点。回顾了几种亚表面有损表征技术,通过实验重新评价了蚀刻表面峰谷(PV)粗糙度法的可行性,分析了其误差较大的原因。在此基础上,提出了一种新的亚表面损伤层深度检测方法——HF蚀刻+逐层抛光法。分别采用这两种表征技术以及粗糙度估计法、磁流变斜面抛光法对不同工艺研磨的熔石英亚表面裂纹深度进行了对比检测,结果表明这几种表征方法相互符合很好。 展开更多
关键词 光学制造 亚表面损伤 HF蚀刻+逐层抛光法 疏松研磨剂研磨 磁流变抛光
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