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趙統來 충남대학교 1977 工業技術開發硏究所論文集 Vol.4 No.2
The chlorination rate of malachite has been investigated by using NaCl and CaCl_2 as a function of the heating rates, flow rates of Ar and air and reduction time. The results were as follows. 1. low grade cupric oxide ore could be graded up by chlorination using NaCl or CaCl_2 and CaCl_2 was much more effective than NaCl. 2. Chlorination reaction was more active at higher temperature than melting point of CaCl_2 or NaCl. 3. Ar is better than air in chlorination of cupric oxide ore.
Fe 중에 Nd확산에 관한 연구(R-D반응의 기초연구)
조통래,송창빈,김대수 忠南大學校 産業技術硏究所 1992 산업기술연구논문집 Vol.7 No.1
The growth of intermetallic compounds of rare earth-transition metal has been investigated by the reduction process. Nd was diffused into Fe block and made intermetallic compounds, only the Nd₂Fe17 diffusion layer was obtained for the Nd-Fe system. It was shown that the growth rate of intermetallic compounes was controlled by diffusion. Apprarent activation energy for the diffusion of Nd was 28.5Kcal/mol through arrhenius plots.
趙統來 충남대학교 공업교육연구소 1986 論文集 Vol.9 No.1
Ternary Miscibility gap (phase diagram) of the Pb-Cu-S system is important in smelting of lead and copper. I am experimentally investigating this system at 1250∼800℃.this paper is also experimentally investigating the Ternary micibility gap of Pb-Cu-S system at 700℃ and 600℃. The results obtaimed at 700℃ and 600℃ are shown below. 1. The phase diagram of 700℃ and 600℃ is the same as at 800℃, but there is a now area of q. 2. The three phase regions of 700℃ and 600℃ are wider than at 800℃ but the type of phase diagram at 700℃ and 600℃ is similer to 800℃.
900℃, 800℃에서의 Pb-Cu-S 3元系의 狀態圖
趙統來,元昌煥 충남대학교 공업교육연구소 1985 論文集 Vol.8 No.1
Ternary miscibility gap (phase diagram) of the Pb-Cu-S System is important to smelting of lead and copper. We are experimentally determinded this System of 1250∼1000℃ This paper is also experimentally determined the ternary mircibility gap of the Pb-Cu-S System at 900∼800℃ the result obtained at 900℃, 800℃, are shown below. 1. Three phase region of 900℃ in wider than at 1000℃. But type of plase diagram at 900℃ is similer of 1000℃. 2. The plase diagram of 800℃ is alomost Same at 900℃.
趙統來,李英美 충남대학교 공업교육연구소 1983 論文集 Vol.6 No.1
A study on the leaching of Gold and Silver by Acidothioureation The cyanide process from which most of the gold and silver have been obtained uses the cyanide solution that is very dangerous poison. Thiourea method was examined its possibility to substitute the cyanide process. The effects of leaching rate of gold and silver by thiourea solution was inverstigated by the addition of oxidizing agents and various kinds of acids. Thus the following results were obtained below. The leaching rate of gold and silver by acidothioureation is faster than cyanide process and the leaching rate of acidothioureation process is about ten times as fast as that of cyanide process. Addition of Fe^3+ ion and sulfuric acid to thiourea solution results in an increase in the leaching rate of gold and silver.
趙統來,鄭文敎 충남대학교 공업교육연구소 1982 論文集 Vol.5 No.2
Ternary miscibility gap of the Pb-Cu-S system is important to smelting of lead and copper. We are experimentally determinded this system at 1150℃ 1200℃ and 1250℃ in the previous reports^1-2). This paper is also experimentally determined the Ternary miscibility gap of the Pb-Cu-S system at 1100℃. The result obtained at 1100℃ was almost the same as obtained at 1150℃ to 1200℃ within experimental errors and it was concluded the miscibility gap.
趙統來,李鴻魯,朴承甲 충남대학교 공업교육연구소 1982 論文集 Vol.5 No.1
Ternary miscibility gap of the Pb-Cu-S system is important to smelting of lead and copper, but we can not find experimental determination of this system. Ternary miscibility gap of the Pb-Cu-S sytem was experimentally determined at 1250℃. Isoactivities tie line of lead, copper and sulfer in this ternary miscibility gap of the Pb-Cu-S system was determined.
趙統來 충남대학교 공업교육연구소 1981 論文集 Vol.4 No.2
The distribution of arsenic between liquid copper and coprous sulfide was determined in the temperature range of 1150-1250℃. The distribution ratio L_As of arsenic decreases with increasing both the arsenic concentration and temperature. The distribution ratio of arsenic is 9-12.
趙統來 충남대학교 공업교육연구소 1981 論文集 Vol.4 No.1
The reaction mechanism and kinetics between lead sulfide and lead oxide were studied using D. T. A. and measuring the volume of evolved SO_2 at various temperatures from 600℃ to 950℃. The results obtained are as follows ; 1) The reaction steps between lead sulfide and lead oxide are ; a) PbS+2PbO→3Pb+SO_2 b) SO_2+6PbO→PbSO_4·4PbO+Pb c) 3PbS+PbSO_4·4PbO→8Pb+4SO_2 d) 2PbS+PbSO_4·2PbO→5Pb+3SO_2 2) The reaction rate was controlled by the growth of lead atoms.
趙統來,金鎭善 충남대학교 공업기술개발연구소 1976 工業技術開發硏究所論文集 Vol.3 No.2
The oxidation rate of calcium chloride has been investigated by measuring titrimetrically the evolution of Cl_2 as a function of the temperature, the partial pressure of oxygen and the surface area of CaCl_2. The following results were obtained: The rate controlling step is a interface chemical reaction. The oxidation rate of CaCl_2 is proportional to the surface area of the CaCl_2 and square root of the oxygen pressure. The activation energy of oxidation reaction of CaCl_2 is 27.3 Kcal.