Research and Development of Vacuum - Lined Ladle
Weiwu Liang,
Xiaochang Zhu,
Xiaofeng Zheng,
Junling Liu
Issue:
Volume 4, Issue 1, January 2019
Pages:
1-5
Received:
18 October 2018
Accepted:
29 January 2019
Published:
25 February 2019
Abstract: Due to defect of poor heat preservation property, the common steel ladles can’t pour numbers of boxes by one bag for special steel, such as high manganese steel which is sensitive to casting temperature, casting grain size and mechanical properties. The common steel ladles cooling fast often cause cold ladle and misrun. For better insulation, a vacuum insulation layer was added to the ladle to maintain the temperature of the molten steel, reduce the heat absorption of molten steel by ladle and reduce heat exchange with the outside world. The test results showed that the vacuum-lined steel ladle had a desired insulation performance which was much better than ordinary ladle. It improved the properties of castings and also had distinct energy - saving effect. Its good insulation performance brought a series of advantages, such as heating up fast during preheating of ladle, pouring temperature of molten steel could be further reduced, refining the casting grain size, improving the mechanical properties of the casting and wear resistance. Good insulation performance also could extend pouring time. At the same time, the low temperature ladle wall brought good working environment to foundry workers.
Abstract: Due to defect of poor heat preservation property, the common steel ladles can’t pour numbers of boxes by one bag for special steel, such as high manganese steel which is sensitive to casting temperature, casting grain size and mechanical properties. The common steel ladles cooling fast often cause cold ladle and misrun. For better insulation, a vac...
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Study on Saponification Technology of Precision Forgings for Constant Speed Transmission Shaft of Car
Wang Delin,
Lu Yougen,
Wu Bing
Issue:
Volume 4, Issue 1, January 2019
Pages:
6-9
Received:
8 November 2018
Accepted:
30 January 2019
Published:
25 February 2019
Abstract: The high-concentration pickling and the extreme emission and energy consumption of the precision saponification process before the cold finishing of the precision forgings of the constant speed drive shaft of the car. Oil mist emissions from the cold finishing process and relatively harsh working conditions. The purpose of this paper is to develop a new saponification process that saves energy and reduces emissions while ensuring product quality during production. Through a large number of tests, it shows that the saponification of precision forgings for the drive shaft can be completed by three steps including simple saponification liquid spraying, liquid extraction and hot air drying. Thus in this way, the saponification quality is the best, At the same time, it has greatly reduced emissions, while the instability of the saponification quality mainly relates to the control of saponification process.
Abstract: The high-concentration pickling and the extreme emission and energy consumption of the precision saponification process before the cold finishing of the precision forgings of the constant speed drive shaft of the car. Oil mist emissions from the cold finishing process and relatively harsh working conditions. The purpose of this paper is to develop ...
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A Study on Minimization of Injury and Accidental Causes in Different Operational Sections of RMG Industries in Bangladesh
Israt Parveen,
Md. Iqbal Mahmud,
Anik Kumar Mondol,
Mosammot Nelufa Akter,
Shima Shil
Issue:
Volume 4, Issue 1, January 2019
Pages:
10-18
Received:
4 March 2019
Accepted:
9 April 2019
Published:
29 April 2019
Abstract: The primary objective of this study is to investigate the industrial accident in readymade garments (RMG) industries and find out the ways how this risk of injuries and accidents can be mitigating by implementing safety rules and suggestions. The paper discusses in brief the risk of injury and accidental causes of workers in various sections like dyeing, cutting, sewing, printing and finishing of RMG industries based upon the industrial environment and working conditions. The sample respondents are selected from the different industries in Tangail district. Purposive sampling technique is followed for data collection, where different level of respondents is interviewed for collecting information from selective garments industry. After analyzing the collected data, the major accidental causes and injuries faced by the workers in those selective units are indicated for which there have been noticed a massive fall down of workers’ efficiency. Indicating those problems, improvement proposals are given to those industries and implemented over a course of month. From the proposed improvement proposal, it is found that, the rate of injury and accidental risks have been decreased far better than before and almost all risks can be properly controlled if the managing as well as responsible parties try to follow the risk controlling technique properly.
Abstract: The primary objective of this study is to investigate the industrial accident in readymade garments (RMG) industries and find out the ways how this risk of injuries and accidents can be mitigating by implementing safety rules and suggestions. The paper discusses in brief the risk of injury and accidental causes of workers in various sections like d...
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