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:To promote the resource utiiization of zinccontaining metallurgical dust and sludge in ron and steel industry, the zinccontaining metallurgccal dust and sludge with ron content of 30. 38% and zinc content of 4. 79% was studed by microwave reduction roasting-magnetic separaiion test. The experimental resutts show that t is difficult to reaize the effective separation of zinc and ron in Yin--containing metallurgccal dust and sludge by direct magneto separation wrthout roasting and convenional muffle furnace reduction roasting-magnetic separaion. When the microwave muffle furnace roasiing at 700 C for 15 min. The main phase in the roasted product Is Fe. When the magnetic field intenstty of the roasted product Is 150 mT,the zinc and ron in the zinccontaining metallurgccal dust can achieve better separaion. The concentrate index obtained by magnetic separation:the zinc content Is 2. 73%,the ron content Is 57. 84%, the ron recovery rate ss 88. 67%, tailings index of magneic separaion: the ron content Is 9.54%, the zinc content ss 9. 85 %, the zinc recovery rate Is 61. 72%. [ABSTRACT FROM AUTHOR]

Recent new technologies and progress of refractories for iron and steel industry were introduced, including composite bonded silicon carbide materials for coke dry quenching furnaces, key refractories for hydrogen-based shaft furnaces, key refractories for OY furnaces (improved COREX-C3000), silicon carbide tuyere combination bricks for iron-making blast furnaces, environmentally friendly long-life Al2O3-SiC-C castables for blast furnace iron trough, zirconia slide plates for slag skimming of converters, refractories for refining ladles, gradient functional refractories for continuous casting, high-efficiency thermal insulation materials for high-temperature devices, recycling of hot blast furnace slag and foam ceramic filters for casting. Through the adoption of these new technologies, the requirements of new equipment and new technology in iron and steel industry can be met, improving the service life of existing furnace lining or key refractory materials, saving energy and decreasing consumption, purifying molten steel or molten iron, and strengthening the utilization of solid waste. [ABSTRACT FROM AUTHOR]

The degradation efficiency of bisphenol A (BPA) in aqueous solution was investigated in UV 254 nm combined with potassium ferrate [ UV/Fe(VI) ] process・ The main active components for BPA oxidation were identified, and the possible degradation pathways of BPA were also proposed・ The results showed that the synergistic degradation of BPA in UV/Fe(VI) process followed the pseudo second-order kinetics, and its degradation rate was enhanced by 98. 94% and 67. 17% compared with single UV and Fe(VI), respectively・ The removal rate of BPA reached 91 ・ 46% when the BPA concentration was 220 |jimol/L, Fe(VI) concentration was 50 |jimol/L, the system temperature was 25 °C and pH 6. creasing temperature and pH, the presence of humic acid and CO| can enhance the degradation efficiency. The dominated reactive oxidation species in UV/Fe(VI) system were Fe(V), Fe(IV), superoxide radicals and hydroxyl radicaL The degradation of BPA mainly underwent the demethylation, hydroxylation and ring opening reactions in UV/Fe(VI) system. [ABSTRACT FROM AUTHOR]

Objective To compare the application of two job posture load assessment methods, the Ovako working posture analysis system (OWAS) and the rapid entire body assessment (RULA), in the iron and steel industry and to understand the ergonomic load of workers, providing the basis for ergonomic intervention measures. Methods Totally 35 main work activities in an iron and steel industry were investigated, and video capture of each activity was carried out. OWAS and RULA were used to assess the postural overloads, and the results derived from the two methods were compared. Results The assessment with the OWAS method showed there were 4 low (11.4%), 20 medium (57.1%), 9 high (25.7%), and 2 extremely high risk activities (5.7%). The assessment with the RULA method evaluated showed there were 4 low (11.4%), 17 medium (48.6%), 10 high (28.6%), and 4 extremely high risk activities (11.4%); 30 work activities were assessed at the same level of risk by these two methods with a consistency rate of 85.7%, and for the remaining 5 activities, OWAS assessed a lower risk level than RULA. The Kappa statistic showed that the two methods had strong consistency (Kappa value = 0.773, P < 0.05). The results showed that the risk grade of iron-making, steel-making, and special steel divisions was higher (P < 0.05). Conclusions These two methods of risk assessment were highly consistent in the iron and steel industries. Compared with OWAS, RULA was more sensitive to the working posture with high biomechanical load on upper limbs and neck-back and could better reflect the risk level of working activities in the iron and steel industries. [ABSTRACT FROM AUTHOR]

Copyright of Inorganic Chemicals Industry is the property of Editorial Office of Inorganic Chemicals Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mining & Metallurgy (10057854) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The development achievements of refractory industry in the past were reviewed,especially those during the 13th Five-Year Plan period. The assistance of refractories as the basic materials to the development of iron and steel industry was introduced,the existing problems and challenges were analyzed,and the direction and the way of the high-quality development of the refractory industry in the future were discussed. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Central China Normal University is the property of Huazhong Normal University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Effective mining of mass production data helps to improve the productivity and the level of management to realize “smart steel works”. The production data for the last 4 years of one steel works were collected， and the box plot was used to clean the data to improve their quality. Twenty-three characteristic parameters affecting hot metal quality and yield were selected by technological theory and expertise combined with the random forest algorithm. Hot metal yield and Si+Ti content were taken as the objective parameters， which could be divided into three categories by k-means cluster analysis. Thirteen parameters contributing to the wide range fluctuation of hot metal yield and quality were obtained after the comprehensive analysis of classification results and characteristic parameters， and the reasonable variable ranges of corresponding parameters were provided. The research can guide the stable operation of blast furnaces and the application of data mining in the iron and steel industry. [ABSTRACT FROM AUTHOR]

Copyright of Research of Environmental Sciences is the property of Research of Environmental Sciences Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Research of Environmental Sciences is the property of Research of Environmental Sciences Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article focuses on earlier studies conducted on the basis of textual sources to analyze the ancient technology of iron-making by using coke in China. It mentions that the presence of the technology of iron-making in the Ming Dynasty cannot be proved through the present literature. It states that the iron-making technique was achieved through crucible smelting in the early Qing Dynasty.

Some courtyard sites, traces of field ridges and big iron ploughs of the Han Dynasty were found at Sanyang Village in Neihuang county, Henan province, in 2005. The field ridge is one form of cultivation method in the West Han dy- nasty, and it was formed by the big iron ploughs like those unearthed from Sanyang Village according to the plowing experi- ment of recovery in the past. The "big ironware", which is mentioned in Discourses on Salt and Iron , a document of the West Han Dynasty, refers to whole iron plough, and it includes the oversized kind. Since the Han Government monopolized the management right of salt and iron nationwide, the production plan of the official iron workshop often refuses to consider the practical farming conditions of the peasants', such as the relative shortage of the farm cattle. On this account, the man- agement policy was then attacked by the talents and virtuous. [ABSTRACT FROM AUTHOR]