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AI_4C_3 Hydration Thermochemical Analysis for Burned Carbon-containing Refractories with Al 被引量:5
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作者 YANG Ding’ao, YU Zhiming and FAN Liuwu( Sanmenxia Polytechnic College, Sanmenxia, Henan 472000, China ) 《China's Refractories》 CAS 2003年第1期19-22,共4页
In this paper, X-ray diffractogram analysis and SEM observation of Al$ C$ formed at high temperature from carbon-containing refractories ivith Al have been carried out. Aluminum added to carbon-containing refractories... In this paper, X-ray diffractogram analysis and SEM observation of Al$ C$ formed at high temperature from carbon-containing refractories ivith Al have been carried out. Aluminum added to carbon-containing refractories reacts with C(s) to form Al^ C^(s) gradually during heating from 600 ’C to 1200^0 . It is considered that the interlocked structure of Al^ C-$ plate crystals promotes the outstanding increase of hot modulus of rupture of carbon-containing refractories with Al. The HMOR of carbon-containing refractories added with Al additive from 0 to 5wt% increases by 2.8 times being from 6.5MPa to 18.2MPa. After a thermochemical calculation for hydration reaction processes ofAl^C^ and H^O (g), the equilibrium partial pressure chart ofH^O (g) in H^O-A^C^-Al^ OH)} system vs various temperatures has been attained . The H2 0 (g) partial pressure in the air needed for the Al^ C3 hydration reaction is no more than 10;18 atm at the temperature below 120t . It is considered that the burned carbon-containing re 展开更多
关键词 Aluminium carbide HYDRATION Thermo-chemical analysis carbon-containing refractory Aluminium
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Effect of One/Two-dimensional Bonding Phases on Strength and Toughness of Carbon-containing Refractories
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作者 ZHU Boquan LI Xiangcheng +2 位作者 CHEN Ping'an WEI Guoping WANG Xuan 《China's Refractories》 CAS 2018年第3期8-20,共13页
Gaseous phases of carbon-containing and metastable oxides will be resulted from the carbonization of phenolic resin binders and the reduced reactions between C and oxides at high temperatures in carbon-containing refr... Gaseous phases of carbon-containing and metastable oxides will be resulted from the carbonization of phenolic resin binders and the reduced reactions between C and oxides at high temperatures in carbon-containing refractories. With the in-situ catalysis technique, these gaseous phases can be transformed to one-or two-dimensional bonding phases by deposition,which is favorable for the improvement on strength and toughness of carboncontaining refractories,especially low carbon refractories. The research results reveal that:( 1) the amorphous carbon resulted from phenolic resin can be transformed to carbon nanotubes,thus,the oxidation peak temperature is raised from 506 to 664. 6 ℃;( 2) onedimensional whiskers of MgO or Mg Al2 O4 can be in-situ formed in MgO-C refractories, and their CMOR,CCS,rupture displacement and residual CCS( two water quenching cycles,1 100 ℃) are increased by 66%,47%,13% and 26%,respectively;( 3) two-dimensional array structure of flake β-SiAlON can be in-situ formed in Al2 O3-C refractories,which improves the material strength by 60% and decreases the residual strength after thermal shock by only 4. 5 MPa. It is believed that the in-situ formation of one-or two-dimensional bonding phases at high temperatures can improvethe comprehensive thermal physical properties of carboncontaining refractories,and will be the developing trend of the strengthening and toughening of low carbon-containing refractories. 展开更多
关键词 carbon-containing refractories bonding phase ONE-DIMENSIONAL TWO-DIMENSIONAL array structure
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Research and development of recycling utilization of used refractories:A review 被引量:2
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作者 Wu Xiaowen Chi Peng +6 位作者 Cheng Bohao Zhang Yuena Su Wei Min Xin Fang Minghao Liu Yan’gai Huang Zhaohui 《China's Refractories》 CAS 2020年第3期38-47,共10页
Due to thermal stability and excellent resistance to slag erosion,the used refractories can be recycled as the main raw material for some refractories.In this article the latest developments about used refractories in... Due to thermal stability and excellent resistance to slag erosion,the used refractories can be recycled as the main raw material for some refractories.In this article the latest developments about used refractories in metallurgical industry has been reviewed,focusing on the results reported in the past decade.The research and reutilization methods of used refractories were discussed.For the research of used refractories,the results of two aspects,the performance and surface corrosion characteristics,are summarized.Then,the advances in research on recycling technology of several main kinds of used refractories,such as MgO-C,Al2O3-SiC-C,Al2O3-MgO-C,magnesium-chrome,and corundum-spinel refractories were summarized and discussed in detail.Some results of the author’s group were reported等线accompanied by these comments.The microstructure and chemical composition were studied by scanning electron microscopy and energy dispersion spectra,and the properties of the refractories were analyzed.Afterwards,the scope of application of materials was determined according to the classification and analysis of refractories.Finally,the large-scale application of used refractories and an outlook is given to future developments of the entire recycling industry. 展开更多
关键词 used refractories in metallurgy Corrosion characteristics Recycling utilization MGO-C CORUNDUM-SPINEL
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Reuse and Reproduction of Used Refractories 被引量:1
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作者 TIAN Shouxin YU Yanwen 《China's Refractories》 CAS 2006年第1期21-24,共4页
The paper analyzed the recycle condition and developing trend of used refractories China and other countries, irwluding research achievements of recycles of used refractories such as MgO-C bricks, Al2O3-MgO-C brics, A... The paper analyzed the recycle condition and developing trend of used refractories China and other countries, irwluding research achievements of recycles of used refractories such as MgO-C bricks, Al2O3-MgO-C brics, Al2O3-SiC-C castable and MgO-Cr2O3 bricks. Recycled refractories exhibit the same or even better properties as compared with the original. In addition, prospects for recycle of used refractories are also discusseded. 展开更多
关键词 used refractories RECYCLE DISPOSAL Magnesia-carbon brick Alumina-silicon carbidecastable Magnesia-chrome brick.
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A review on graphite surface modification methods towards low carbon-containing refractories
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作者 Ting-ting Zhang Jun Ding +3 位作者 Bei-yue Ma Zheng-long Liu Chao Yu Cheng-ji Deng 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2024年第6期1291-1303,共13页
The rapid development of iron and steel metallurgy technology has promoted the continuous innovation and iteration of carbon-containing refractories for clean steel smelting.To meet the high-quality requirements for c... The rapid development of iron and steel metallurgy technology has promoted the continuous innovation and iteration of carbon-containing refractories for clean steel smelting.To meet the high-quality requirements for clean steel production and full exploit the performance advantages of carbon-containing refractories in dynamic smelting environment,it is necessary to explore the role of graphite and modified graphite in carbon-containing refractories.Based on this,graphite surface modification methods,including surfactants,surface oxidation,and surface coating,and their applications in carbon-containing refractories are reviewed.The advantages and disadvantages of each method are analyzed for practical use.Furthermore,combined with the existing problems,the application prospect of improved graphite in carbon-containing refractories is discussed. 展开更多
关键词 GRAPHITE carbon-containing refractory Clean steel Surface modification Service performance
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A Royal Jelly Mixture with Berberine for Dressing Change on a Refractory Skin Ulcer:A Case Report
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作者 Weisheng He Mimi Zhou Yue Chen 《Journal of Geriatric Medicine》 2021年第2期1-3,共3页
It has been reported that a 92-year-old female had got a bruise superficial wound on her right leg one and a half years ago,developing into refractory skin ulcer due to improper management before.A prepared cream,mixe... It has been reported that a 92-year-old female had got a bruise superficial wound on her right leg one and a half years ago,developing into refractory skin ulcer due to improper management before.A prepared cream,mixed royal jelly with berberine for dressing change,was made on the scene through the crush of berberine tablets,working with fresh royal jelly.Topical dressing change with the cream was done every 3 days,and two months later,such the ulcer became clean and was covered fully with fresh granulation tissue.This kind of cream consists of the ingredients of TCM purely,free of antibiotic,and being quite effective clinically,also helpful for proper use of antibiotic. 展开更多
关键词 Refractory skin ulcer A mixture of TCM dressing change Proper use of antibiotic
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