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Abrasivity of Rock and Bit Wear in Drilling. 岩石的磨蚀性和钻头在钻井中的磨损。
The Mining and Materials Processing Institute of Japan Pub Date : 1997-01-01 DOI: 10.2473/SHIGENTOSOZAI.113.325
S. Okubo, A. Ota, Masao Akiyama, K. Fukui, Y. Nishimatsu
{"title":"Abrasivity of Rock and Bit Wear in Drilling.","authors":"S. Okubo, A. Ota, Masao Akiyama, K. Fukui, Y. Nishimatsu","doi":"10.2473/SHIGENTOSOZAI.113.325","DOIUrl":"https://doi.org/10.2473/SHIGENTOSOZAI.113.325","url":null,"abstract":"The paper describes a fundamental investigation of the abrasive wear in rock drilling and cutting. Three laboratory tests of rock abrasivity were carried out and the results were compared with those obtained in fullscale field drilling tests.The laboratory tests were comprised of drilling test, Taber abrasive test and turning-operation (facing) test developed in the study. The Taber abrasive test was found to be not feasible because of its difficulty in specimen preparation. The modified drilling test and the turning-operation test gave reasonable results. A correlation was demonstrated between abrasivity and unconfined compressive strength for more than fifty rock samples. There was also a rough correlation between the results of the modified drilling test and the turning-operation test.The field drilling tests were performed measuring height-loss and gauge-loss of a worn bit. The best correlation exists between results of the turning-operation test and the field drilling test.","PeriodicalId":22754,"journal":{"name":"The Mining and Materials Processing Institute of Japan","volume":"79 1","pages":"325-332"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75085859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Numerical Estimation Ground Vibration Control Method Based on Precise Delay Time Control. 基于精确时滞控制的地面振动数值估计控制方法。
The Mining and Materials Processing Institute of Japan Pub Date : 1997-01-01 DOI: 10.2473/SHIGENTOSOZAI.113.100
S. Kunimatsu, T. Isei, M. Ali, E. Farsangi, S. Durucan, G. Johnston
{"title":"Numerical Estimation Ground Vibration Control Method Based on Precise Delay Time Control.","authors":"S. Kunimatsu, T. Isei, M. Ali, E. Farsangi, S. Durucan, G. Johnston","doi":"10.2473/SHIGENTOSOZAI.113.100","DOIUrl":"https://doi.org/10.2473/SHIGENTOSOZAI.113.100","url":null,"abstract":"In order to reduce blast vibration,we usually use delayed blasting method.Recently,it became to be able to control delay time precisely within several,t s.Based on such preciseness of initiation time,we studied nine setting methods of delay time for the purpose of reducing total ground vibration.As the results,we indicated setting method had influenced on peak particle velocity,predominant frequency and its amplitude remarkably and then discussed the results from point of view of blast vibration control.","PeriodicalId":22754,"journal":{"name":"The Mining and Materials Processing Institute of Japan","volume":"656 1","pages":"100-106"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76841547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Recycling. Zinc Smelting and its Recycling. 回收利用。锌冶炼及其回收。
The Mining and Materials Processing Institute of Japan Pub Date : 1997-01-01 DOI: 10.2473/SHIGENTOSOZAI.113.967
Takashi Yoshida
{"title":"Recycling. Zinc Smelting and its Recycling.","authors":"Takashi Yoshida","doi":"10.2473/SHIGENTOSOZAI.113.967","DOIUrl":"https://doi.org/10.2473/SHIGENTOSOZAI.113.967","url":null,"abstract":"Zinc is one of the most important metal element for our living. It is no doubt that recycling is the most important issue for industry. Secondary zinc industry has been established based on economical situation. But still important problems on zinc recycling have been remained. In this report the outline of zinc recycling is discussed. The most important issue on zinc recycling is treatment of EAF dust from steel recycling system and fly ash of incineration process. Both materials include certain amount of halogen elements. They cause several problems on their treatment process. It would be emphasized that combination of steel making process and non-ferrous metal smelting process could give the solution not only on future zinc recycling but on the waste management in Japan.","PeriodicalId":22754,"journal":{"name":"The Mining and Materials Processing Institute of Japan","volume":"9 1","pages":"967-971"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73143711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Changes of Micro-Structures of a Soft Rock on the Creep Loading Process. Studies on the creep mechanism under compressive load of rocks (Part-1). 软岩蠕变加载过程中微观结构的变化岩石压缩载荷作用下蠕变机理研究(1)。
The Mining and Materials Processing Institute of Japan Pub Date : 1997-01-01 DOI: 10.2473/SHIGENTOSOZAI.113.817
S. Yamashita, F. Sugimoto, M. Yamauchi, S. Mori, D. Namsrai
{"title":"Changes of Micro-Structures of a Soft Rock on the Creep Loading Process. Studies on the creep mechanism under compressive load of rocks (Part-1).","authors":"S. Yamashita, F. Sugimoto, M. Yamauchi, S. Mori, D. Namsrai","doi":"10.2473/SHIGENTOSOZAI.113.817","DOIUrl":"https://doi.org/10.2473/SHIGENTOSOZAI.113.817","url":null,"abstract":"In this study, drained creep tests under uni-axial compressive load were carried out on Kimachi-sandstone to clarify the creep process and mechanism of the soft sedimentary rock.During these experiments, axial strain, lateral strain and the Acoustic Emission (AE) activity were observed in the loading time intervals of several minutes to one month.Furthermore, thin sections for microscope were made of the tested specimens and micro-photographs on these sections were taken by a microscope. On these micro-photographs, using an image processing technique of a micro-computer, numerical data for the changes of pores and micro-cracks at controlled creep time or at prescribed creep region were acquired.The main results obtained from these tests are as follows; 1) In loading process of the creep load on a rock specimen, firstly the axial strain rate is shown to decrease gradually to a minimum value, after it increases gradually and finally it increases rapidly, and then the specimen is going to fail, 2) In the process of decreasing the axial strain rate, closure of pores in the rock occurs and the compacting of the rock takes place. But, the compressive strength of the specimen, which is unloaded in this loading process, is not affected by the loading time and is almost the same as that of the intact rock, 3) In the process of increasing the axial strain rate, that is after passing through the minimum point of the axial strain rate, cracks in the specimen develop toward the direction parallel to the loading axis. And also, the compressive strength of the specimen, from which load is removed in this process, decreases as compared with that of intact rock.","PeriodicalId":22754,"journal":{"name":"The Mining and Materials Processing Institute of Japan","volume":"25 1","pages":"817-824"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73577374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Technical and other Experience at Embalut Coal Mine. 在Embalut煤矿有技术和其他经验。
The Mining and Materials Processing Institute of Japan Pub Date : 1997-01-01 DOI: 10.2473/SHIGENTOSOZAI.113.760
A. Kakizaki
{"title":"Technical and other Experience at Embalut Coal Mine.","authors":"A. Kakizaki","doi":"10.2473/SHIGENTOSOZAI.113.760","DOIUrl":"https://doi.org/10.2473/SHIGENTOSOZAI.113.760","url":null,"abstract":"","PeriodicalId":22754,"journal":{"name":"The Mining and Materials Processing Institute of Japan","volume":"1 1","pages":"760-763"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81154724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fundamental Study on the Phase Diagram of SnO-SiO2 System. SnO-SiO2体系相图的基础研究。
The Mining and Materials Processing Institute of Japan Pub Date : 1997-01-01 DOI: 10.2473/SHIGENTOSOZAI.113.39
K. Koike, T. Otomo, N. Taguchi
{"title":"Fundamental Study on the Phase Diagram of SnO-SiO2 System.","authors":"K. Koike, T. Otomo, N. Taguchi","doi":"10.2473/SHIGENTOSOZAI.113.39","DOIUrl":"https://doi.org/10.2473/SHIGENTOSOZAI.113.39","url":null,"abstract":"In the pyrometallurgical treatment of tin, it is necessary to identify the proper chemical composition of slag based on the thermodynamic behavior and phase diagram for decreasing of tin losses with effective recovery of tin from slag. Although some studies were reported about the phase diagram of SnO-SiO2 binary system, which is basic system of slag in the tin smelting, those results show always disagreement. W hereas it is necessary to consider closely the stability of solid SnO with increasing in temperature when the specimen contains SnO component, because solid SnO decomposes easily by a disproportionation with increasing in temperature.In the present study, firstly, the disproportionation of solid SnO with increasing in temperature was examined, and then the liquidus of SnO-SiO2 binary system was also investigated by SnO or SiO2 saturation method.Furthermore the influence of CaO and FeO addition on the liquidus in SnO-SiO2 system was investigated. The results obtained were summarized as follows:Solid SnO decomposed with increasing in temperature in the following manner: SnO→Sn, SnO, Sn3O4→Sn, Sn3O4→Sn, Sn3O4, SnO2→Sn, SnO2.It was confirmed that the phase diagram of SnO-SiO2 system is an eutectic type and the rising of liquidus at SiO2 side is very sharp. And it was thought to be appropriate that a metasilicate phase, such as SnO·SiO2is existed in this system, and it seemed metastably intermediate product.The melting point of SnO-SiO2 system raised by CaO addition, while it lowered by FeO addition.","PeriodicalId":22754,"journal":{"name":"The Mining and Materials Processing Institute of Japan","volume":"4 1","pages":"39-44"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81163984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Recycling. Recycle of Aluminum. 回收利用。铝的回收利用。
The Mining and Materials Processing Institute of Japan Pub Date : 1997-01-01 DOI: 10.2473/SHIGENTOSOZAI.113.982
K. Oosumi
{"title":"Recycling. Recycle of Aluminum.","authors":"K. Oosumi","doi":"10.2473/SHIGENTOSOZAI.113.982","DOIUrl":"https://doi.org/10.2473/SHIGENTOSOZAI.113.982","url":null,"abstract":"In recycling of aluminum, the quality and the yield of molten aluminum at remelting are important subjects. For recycled products, secondary aluminum material used to be predominant but now compounds of 4iu minum and polymers account for the majority. This paper focuses on aluminum used beverage cans (U, 13, C.) as a typical example of recycled aluminum, and discusses the effects, etc. of pretreatment of material (paint removal by chemical method) on the molten aluminum quality and aluminum yield at remelting. The investigation results indicate that paint removal is effective for improving the molten aluminum quality, in partfeular, for reduction of impurity element titanium, as well as improving the aluminum yield.","PeriodicalId":22754,"journal":{"name":"The Mining and Materials Processing Institute of Japan","volume":"12 1","pages":"982-985"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87986791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Applied Technology by Use of Inverters for Underground Mining in Ikeshima Colliery. 池岛煤矿地下开采逆变器应用技术。
The Mining and Materials Processing Institute of Japan Pub Date : 1997-01-01 DOI: 10.2473/SHIGENTOSOZAI.113.757
Kazuo Hiromoto
{"title":"Applied Technology by Use of Inverters for Underground Mining in Ikeshima Colliery.","authors":"Kazuo Hiromoto","doi":"10.2473/SHIGENTOSOZAI.113.757","DOIUrl":"https://doi.org/10.2473/SHIGENTOSOZAI.113.757","url":null,"abstract":"","PeriodicalId":22754,"journal":{"name":"The Mining and Materials Processing Institute of Japan","volume":"86 1","pages":"757-759"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91075074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Thrust on Rock-Drill Performance. Computer simulation of percussive drilling (2nd Report). 推力对凿岩机性能的影响冲击钻井的计算机模拟(第二次报告)。
The Mining and Materials Processing Institute of Japan Pub Date : 1997-01-01 DOI: 10.2473/SHIGENTOSOZAI.113.613
S. Okubo
{"title":"Effects of Thrust on Rock-Drill Performance. Computer simulation of percussive drilling (2nd Report).","authors":"S. Okubo","doi":"10.2473/SHIGENTOSOZAI.113.613","DOIUrl":"https://doi.org/10.2473/SHIGENTOSOZAI.113.613","url":null,"abstract":"A drilling model was previously proposed by Okubo and Nishimatsu (1991), and a computer program which had capability to simulate continuous drilling-process was also developed bythem. The model which consists of a drill-body, a piston, a rod and a bit was analyzed based on the one-dimensional stress-wave theory. A force-penetration curve with hysteresis was assumed for bit/rock interface.In this study, comprehensive simulation for a heavy drifter of 150 kg-class was carried out. Special care was taken to clarify the effect of thrust on rock-drilling performance such as penetration rate, piston stroke, piston velocity, elastic wave in rod. Calculation was performed under more than two-thousand conditions changing thrust, bit/rock interface parameters and attenuation rate on drill/rod interface.An appropriate thrust, Fth_apl, was proposed as follows; Fth-apl≅Aback·Pback-Afront·Pfront, Where ‘A’ denotes effective cross-sectional area, and ‘P’ pressure. Subscripts ‘back’ and ‘front’ indicate back and front cylinders, respectively.","PeriodicalId":22754,"journal":{"name":"The Mining and Materials Processing Institute of Japan","volume":"3 1","pages":"613-618"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88403844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Preparation of Magnesium Hydroxide from Magnesite by means of Mechanochemical Treatment and its Reactivity. 菱镁矿机械化学处理制备氢氧化镁及其反应性。
The Mining and Materials Processing Institute of Japan Pub Date : 1997-01-01 DOI: 10.2473/SHIGENTOSOZAI.113.175
Qiwu Zhang, F. Saito, M. Hanada
{"title":"Preparation of Magnesium Hydroxide from Magnesite by means of Mechanochemical Treatment and its Reactivity.","authors":"Qiwu Zhang, F. Saito, M. Hanada","doi":"10.2473/SHIGENTOSOZAI.113.175","DOIUrl":"https://doi.org/10.2473/SHIGENTOSOZAI.113.175","url":null,"abstract":"Mechanochemical process for producing Mg (OH) 2 from magnesite (MgCO3) without heat treatment has been developed. This process is composed of two steps: The first step is to produce Mg (OH) 2 and Na2CO3 mechanochemically by dry grinding the mixture of magnesite and solid NaOH powders in a mill. The reaction between the two starting samples proceeds as the grinding progresses. The second step is to separate Na2CO3 from the insoluble products in the ground mixture by washing with water. Reactivity of the insoluble products against H2SO4 solution is improved with increasing the grinding time, and levels off in the prolonged grinding. The reactivity of the insoluble products prepared from the mixtures ground for 0 minutes or more is much higher than that of magnesite powder. The separated Na2CO3 can be reused for appropriate purposes","PeriodicalId":22754,"journal":{"name":"The Mining and Materials Processing Institute of Japan","volume":"80 1","pages":"175-178"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90967272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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