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강헌찬,엄제현,김찬국 동아대학교 공과대학 부설 한국자원개발연구소 1992 硏究報告 Vol.16 No.2
Batch flotation of quartz has been attempted for the feldspars sampled from near Buyeo. From the above experiments, the results obtained are as follows ; The zeta potential of quartz is relatively Insensitive when anions are being used, while feldspar is changed by addition of various ions. In particular, with HF ions it is markedly lower in zeta potential of feldspar at around pH 2, which results in the excellent flotation by amine. In the absence of HF, flotation by amine or the more selective diamine is, therefore, more sensitive to pH and collector concentration. In case of using Amine Hoe F 3638 with H₂SO₁, the recovery rate increases up to 90% with its grade of 95%, under the condition by using 800g/T of Amine Hoe F 3638 at pH 2.5∼3.0.
강헌찬,조명호 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.2
Recently disposal of the garbage is getting attention as one of the most serious problems in the communites. A study has been attempted to use the garbage to make the organic fertilizer using vermiculite, which results not only effecive disposal of the garbage but also enormous economic production. 1) The garbage contains NaCl much higher than the night soil. 2) The garbage used the vermiculite as an additive and fertilized with micro-organism didn't smell stinking and the fermentation rate of it was faster than the others. 3) pH had been increased because the Ammonia(NH₃) was produced by the micro-organism reaction, activated from eluting Calcuim(Ca) and Magnesuim(Mg) in vermiculite at pH 3. 4) It has been confirmed that the compound of garbage with vermiculite could be transformed into very good compound organic fertilizer.
용융동및 Speiss와 Calcium Ferrite Slag사이에서 As의 분배평형에 관해서
강헌찬,황용길 동아대학교 공과대학 부설 한국자원개발연구소 1987 硏究報告 Vol.11 No.2
The distribution of arsenic between calcium ferrite slag and liquid copper was measured at 1473 K under controlled CO-CO₂ atmospheres. The distribution ratios defined by % X in slag/%X in metal, were plotted against the oxygen potential. The distribution ratios of arsenic between speiss and calcium ferrite slag were also investigated. From the above experiments, the results obtained are as follows : 1. The liquidus and solidus lines divide the equilibrium diagram into Fe-Cu-As system at 1150℃. 2. In general arsenic has a greater affinity fir Fe-As systems than for Cu-As systems. 3. The distribution ratios of arsenic between speiss or liquid copper and slag increase with the increased content of the CaO in calcium ferrite slag or oxygen potential.
강헌찬,김영훈,김광수,신선명 동아대학교 건설기술연구소 1996 硏究報告 Vol.20 No.1
The propose of this thesis was to study the usage of the low-grade Vermiculite from the Chung Chong province and also to increase its Value-added. A series of experiments have been done for separation as well as heat-expansion characteristics of the Chung Chong Vermiculite some conclusions can be drawn as follows; 1. Vermiculite from Chung-Yang and Hong-Shung areas wear better than that from Palabora's mine in South Africa in terms of the usefulness for an organic fertilizer. 2. The ratio of the volume expansion of Vermiculite increased along with the temperature. 3. In general, the ratio of volume expansion of the vermiculite from Chung-Yang, Hong-Shung and Palabora's mine in South Africa increased with temperature. But it decreased temporarily in the vicinity of 850℃. The result seems to be due to temporary decrease in the latent heat as the crystal water in the crystals such as Ca_(10)(Mg,Fe)₂A1₄Si_(9)O₃₄(OH)₄, K(Fe,Mg)₃AlSi₃O_(10)(OH)₂and K (Fe,Mg)₃AlSi₃O_(10)(OH)₂evaporated. 4. Above 1050℃, the crystal structure began to change and resulted in partial destruction to produce some dusts. Finally sintering occurred.
강헌찬,남영숙 동아대학교 공과대학 부설 한국자원개발연구소 1990 硏究報告 Vol.14 No.2
Batch flotation test of Mica been conducted for the Granite sampled at near Buyeo. Two types of collector were used for the test : anionic type collector ; petroleum sulfonate and cationic type one ; coconut fatty amine oleate. The results of study are as follows. In case of using coconut fatty amine oleate, the Mica has been recovered up to 90% with its grade of 95%. In was achieved under the condition of using coconut fatty amine oleate in the range between 400/T and 750g/ T at pH2.5-3.0. In case of using petroleum sulfonate type, the rate of recovery and its grade are for loss than the above (recovery=50%)
姜憲贊,黃龍吉 東亞大學校 1980 東亞論叢 Vol.17 No.2
裝鋼粉?을 還元해서 얻은 粗酸化亞鉛을 소-다灰로 90℃에서 中和處理한 結果 다음과 같은 結論을 얻었다. 粗酸化亞鉛(Crude zinc oxide, 54%Zn, 9.3%Pb, 13%Cl₂)은 鹽基性 黃酸鉛(Lead basic sulphate0形의 Pb₄O₃SO₄·2H₂O와 Pb₃O₂SO₄만 結晶質이고, 亞鉛과 鹽素의 化合物의 結晶은 確認할 수 없었다. 中和反應 時 Soda-ash使用量은 化學量論的 理論量만 必要했다. 中和反應에 의해 生成된 沈澱物은 鹽基性 炭山亞鉛(Zinc basic carbonate:4ZnO·CO₂·4H₂O)과 鹽基性 炭山鉛(Lead basic carbonate:Pb₃(CO₃)₂(OH)₂)의 形態로 되어 있었다. 또 脫鹽處理한 化合物을 180 gr/ℓ의 H₂SO₄로 浸出한 結果, 浸出液은 130 gr/ℓ Cl₂이고 浸出殘渣는 主로 黃酸鉛(PbSO₄)으로 되어 있었다. After neutralization-treating the crude zinc oxide obtained from the reduction of steel making dusts at a temperature of 90℃, the following results were obtained. 1) The crude zinc oxide (54% Zn, 9.3% Pb, 13% Cl) was found to be crystalline consisting of Pb₄O₃SO₄·2H₂O and Pb₃O₂SO₄with type of lead basic sulphate, however, a crystal of zinc and chlorine compound was not able to be confirmed. 2) The theoretical amount determined in a stoichimetric calculation ash was only required for the reaction of neutralization. 3) The precipitate formed by neutralization reaction was comprixed of zinc basic carbonate (4ZnO·CO₂·4H₂O) and lead basic carbonate (Pb₃(CO₃)₂(OH)₂). 4) It was found by leaching dechlorinated compounds with 180g/ℓof H₂SO₄that the leached solution contained 130g/ℓof Zn and 200 mg/ℓof Cl₂and that the leaching residue consisted mainly of lead sulphate(PbSO₄)