피크링 폐황산으로부터 안료의 제조

황용길,성주경,김재호 대한금속재료학회(대한금속학회) 1974 대한금속·재료학회지 Vol.12 No.2

피크링 폐황산중 용존된 철분을 회수하여 산화철 안료를 만들기 위한 연구이다. 우선 피크링 폐황산 (Fe 44/l, SO^(2-)₄177g/l)을 가성소다 용액으로 중화하여 수산화 제1철을 얻었다. 이것을 100℃, 3∼5 atm(送入空氣壓) 하에서 2시간동안 digestion 하였더니 다음과 같이 되었다. 1) Fe(OH)₂와 피크링 폐황산 (혼합용액의 pH7.9)이 반응시는 α-goethite가 생성되고 철의 회수율은 74% 이상이었다. 2) Fe(OH)₂와 황산제2철용액 (spent solution)이 반응시는 magnetite가 되고 90% 이상의 철이 회수되었다. 3) Fe(OH)₂(pH12 solution)만을 반응시킬시는 δ-goethite가 생성되고 90% 이상의 철이 회수되었다. 상기와 같이 생성된 α-goethite와 magnetite를 600℃에서 하소(calcination) 하였더니 모두 양호한 산화제2철 안료로 되었다. 그리고 δ-goethite를 600℃에서 하소하였더니 α-산화제2철과 magnetite의 혼합물이 생성되었다. The formation of iron oxide in a synthetic picklic sulphuric acid studied at elevated temperature and pressures. Waste picklic sulphuric acid was neutralized by adding sodium hydroxide, resulting hydrous ferrous oxide. The hydrous ferrous oxide thus formed was digested under a pressure of 3 to 5 atmospher at 100℃ for two hours. The results obtained were as follows; 1) When Fe(OH)₂ and picklic acid of pH 7.9 were reacted, 74% of iron was recovered in the form of α-goethite. 2) When Fe(OH)₂ and ferric sulphate solution (spent solution) were reacted, the yield in magnetite was better than 90%. 3) When Fe(OH)₂ of pH 12 reacted alone, δ-goethite was formed and yield was higher than 90%. When magnetite and α-goethite obtained were calcined at 600℃ it had been shown that they both could be turned into α-ferric oxide of the pigment grade, a mixture of α-ferric oxide and magnetite was also formed, when σ-goethite was calcinated at 600℃.

황산스트론튬으로부터 탄산스트론튬으로서의 전환에 관한 연구

이성룡,조충형,황용길 東亞大學校 大學院 1995 大學院論文集 Vol.20 No.-

This study to convert strontium sulfate into strontium carbonate after reduction to strontium sulfide soluble in water was performed with sodium carbonate solution at various temperature. The results obtained from the above are as follows. The reduction temperature of strontium sulfate to strontium sulfide was 800℃. But strontium sulfide was reoxidized to strontium sulfate at the over 1000℃. Lid of reaction vessel closed up influenced increasing carbon activity during the reduction of strontium sulfate to strontium. Leachability of strontium sulfide reduction from strontium sulface in water was increased at high temperature, but decreased at 6mole carbon ratio because of excess carbon not reacted. Recovery of strontium carbonate from strontium sulfate was high at he high concentration of sodium carbonate solution, but low at 3 and 6 mole carbon ratio relatively Recovery of strontium carbonate from strontium sulfide was increased at high temperature, but decreased at 3 and 6 mole carbon ratio relatively. Agitation effect so accelerated to increase recovery of strontium carbonate. Impurities exist in cellestite as calcium sulfate, calcium carbonate, barium sulfate and barium carbonate compounds were not converted into other compounds during reduction of strontium sulfide from strontium sulfate. These compounds insoluble in water are able to be removed during water leaching of strontium sulfide.

폐Al dust와 폐주물사를 이용한 재료 개발

黃龍吉,金蓮洙,金宰逸 동아대학교 환경문제연구소 1986 硏究報告 Vol.19 No.2

The results of sulphuric acid leaching Aluminium dust and of making hydraulic-setting cement stone using Aluminium dust are as follows. 1. Sulphuric acid leaching efficient of Al is better when concentration of sulphuric acid is 200gr/ℓ, over 60℃, for lhours. 2. The aqueous solution recovered from sulphuric acid leaching of Aluminium dust contains Al^(+3) 13.5gr/ℓ and Fe^(2+) 1.65g/ℓ. 3. The hydraulic-setting cement stone making from mixture of cement, foundry sand, fly ash and Aluminium dust pulp(Na₂O·Al₂O₃) has more compressive strength comparing to other cement stones which make from mixture of cement, foundry sand and Aluminium dust pulp and mixture of cement and sand only. 4. Aluminium dust pulp has rapid hydraulic-setting effect in making cement stone.

酸化크롬의 還元機構 (Ⅰ)

黃龍吉,康熙南 동아대학교 공과대학 부설 한국자원개발연구소 1984 硏究報告 Vol.8 No.1

The reduction of chromium oxide by carbon in the range of 1150°~ 1300℃ under the Ar atmosphere has been investigated. The results obtained from the experiment is summarized as follow; 1) From the results of thermal analysis by T.G-D.T.A., metallic chromium and chromium carbide were formed in the range of endothermic reaction. And in this range, the rate of weight loss was reached 29.9% 2) As the reaction temperature increased, the reaction products become coarser, and in the view of area frequency distribution, the particle size from 31㎛ to 40㎛ became coarser about 4 times at the 1300℃ than the 1150℃ 3) From the X-ray diffraction analysis, reaction products at the 1200℃ were mainly Cr₃C₂ and Cr_(7)C₃, and at the 1300℃ the rection products were Cr and Cr_(7)C₃. 4) The reduction rate calculated with the reaction rate of metallic chromium was 98.7%

電氣爐 製鋼粉塵을 발즈法으로 還元 할때에 爐塊 生成에 관하여

黃龍吉,李相和,金榮熙,李成龍 동아대학교 공과대학 부설 한국자원개발연구소 1993 硏究報告 Vol.17 No.2

The steelmaking dust treatment process has been established through reducing volatilization method in rotary kiln. The more content of zinc in reduced pellets and basicity of pellet is in the range of 1.5~3.0, the more working time needed in rotary kiln, because of decreasing wall accretion. A portion of well forming kiln coating in the furnace is a fourth of the total length from the outlet. Constitutes on the furnace wall accretion composed of the mixtures such as Fe, FeO, Fe₂O₃, Fe₃O₄, ZnO and CaO-SiO₂system, and formation of kiln coating is decreased by adding coke ratio.

銅. 니켈 黃酸鹽廢棄物의 處理

黃龍吉,李相和 동아대학교 환경문제연구소 1980 硏究報告 Vol.4 No.1

廢棄되는 黃酸鹽 試料를 處理한 結果 1. 이 試料는 主로 NiSO₄와 FeSO₄의 黃酸鹽이었으며 이들은 750℃에서는 α-Fe₂O₃만 X-線으로 確認되고 1,000℃에서는 NiO와 Fe₃O₄가確認되었다. 2. 黃酸鹽 溶液中의 鐵을 除去하기 위해서 酸化시켜 加水分解한 結果 pH 3~4.5에서 鐵이 赤褐色의 水酸化鐵로 加水分解가 되었고 이때 水酸化鐵中에 含有되어 있는 Ni은 1.2%에 달했다. 3. Eluent LIX-64N을 溶液의 부피와 대등한 부피를 취해서 Ni과 Cu를 抽出했을 경우의 pH는 7以上에서 抽出이 잘 되었고 pH 8.5~10까지의 條件에서 Resine을 處理했을 경우에 Raffinate中에 Ni 含量은 1.2gr/ℓ 程度 存在했으며 Extraction rate는 約 98%에 달했다. The following results have been obtained by treating samples of used sulfate. (1) The X-ray diffraction analysis has shown that this sulfate sample consisting mainly of NiSO₄ and FeSO₄ gives α-Fe₂O₃ at 750℃ and produces NiO and Fe₃O₄ at 1,000℃. (2) When the sample is oxidized and then hydrolysed to remove iron in a solution of sulfate, it has been found that iron turns into reddish-brown hydroraded iron. When this occurs, the Ni content of hydrated iron has reached 1.2%. (3) It has been shown after taking eluent LIX-64N the volume of which is equivalent to the volume of solution that the extraction for Ni and Cu can be done effectively at pH values of 7 or more and that under that condition of pH range from 8.5 to 10 the Ni content of raffinate is about 1.2gr/ℓ, when resine is treated, and extraction rate has been obtained to be nearly 98%.

18Cr-8Ni 및 17Cr Stainless鋼의 硅素에 의한 脫酸擧動에 관한 硏究

李鍾文,黃龍吉 釜産工業大學校 1984 論文集 Vol.25 No.-

The phenomena of decreasing chromium contents, the effect of deoxidation by adding silicon and the floating mechanism of slags, the crystal structure of inclusions for 18Cr-8Ni and 17Cr stainless steel respectively have been investigated. The scraps are melted by a high frequency induction furnace. The results are as follows; 1) The chromium contents in 17Cr stainless steel exhibits a remarkable decrease more than 1 hour is required for melting the scraps. The chromium contents in 18Cr-iNi stainless steel exhibits a small decrease, as 1.67% until holding for 2 hours. The required melting time is 1 hour. 2) The floating rate of spheroidal inclusions is greater than the floating rate of dispersed inclusions form molten bath. 3) The slags of 17Cr stainless steel before deoxidation and after deoxidation by adding silicon are FeO·Cr??O₃ and SiO₂, the slags of 18Cr-8Ni stainless steel is FeO·Cr??O₃, which can be seen by X-ray diffraction method. 4) The inclusions in 18Cr-8Ni and 17Cr stainless steel (containing less than 0.8% Si and less than 1.0% Mn, as cast) are Cr??O₃and Fe??O₄as can be seen by X-ray diffraction method.

製鍊 Slag의 顯熱利用에 관한 基礎硏究

李相和,黃龍吉 東亞大學校 大學院 1984 大學院論文集 Vol.8 No.2

On the purpose of developing the fundamental data, calcium hydroxide for the temperature accumulating media was investigared. The results obtained from the experiment are summarized as follows: 1. 1.37 Kg of calcium hydroxide can be calcinated using the 1 Kg of smeting slag maintained. 2. At calcination, maximum temperature of reacted materials and reactor spaces temperature is at 142℃ and 90℃ respectively. 3. 3 moles of H₂O per 1 mole CaO has been for the long maintanence in the case of maintaining a maximum temperature range and elevating to the 90℃ for the 90 minutes can be obtained by using the adiabatic reaction chamber.

폐타이어를 이용한 제강분진 처리를 위한 기초연구

황용길,이상화,이성룡,정석수,최재신,조충형 한국자원리싸이클링학회 1995 資源 리싸이클링 Vol.4 No.4

분진 중에 함유된 Zn, Pb, Fe 등의 유가 금속을 회수하기 위해 폐타이어를 건류하여 만든 건류탄소를 환원제로 이용하여 재활용하고자 하였으며 또한 분진을 Pelletizing 하거나 Briquetting해서 환원 처리할 때, 공해 발생과 작업상의 단점을 보완하기 위하여 제지공장에서 발생하는 폐펄프와 분진 및 건류탄소를 소정의 비율로 혼합한 후 성형한 다음 통기도 및 압축강도실험 등을 한 결과 다음과 같은 결론을 얻었다. 동일한 건류탄소 첨가량에서 결합제로 사용한 폐펄프의 첨가량이 증가할수록 통기도는 증가하며 이는 시편내 Porosiaty에 기인한 영향이라 생각되며, 동일 첨가량의 폐펄프에서 건류탄소의 첨가량이 증가할수록 통기도는 증가하는 경향을 보이며 압축강도는 건류탄소의 비율과 소결온도에 따라 증가 감소의 현상이 다소 상반되는 결과가 나타났다. 건류탄소 20%, 폐펄프 10%를 첨가하여 만든 Briguetting 시료를 X-선 회절분석 결과 $800^{\circ}C$에서는 ZnO와 $Fe_3$$O_4$가 조사되었으나 $1000^{\circ}C$ 이상에서는 ZnO와 $Fe_3$$O_4$를 확인할 수 없었다. $1000^{\circ}C$에서 소결실험을 한 결과 아연, 철산화물이 분해 증발하여 아연품위가 62%인 조산화아연물을 얻을 수 있었다. Distillation oI the dust generated during waste tue pyrolysis was perIomerl to rccover valuable metal sucll as zlnc. lead and iron. Pemcahilily and carnprcssivc tests were pursucd to ahlain the basic dala for cslraclian of zinc from the slntering propcrtp ol stccl making dusts and distilled carhon of waste tires as wcll as wastc pulp sludge mixlure hr~quet were investigated at various sinlcring lempcraturcs. Permeablllly rncieased with increastng amount of waste pulp in specil~cd istilled carhon due tn the fnrmat~ono f porusily in lhe sample TIE co~npress~vsctr ength showed the vanous values wlth different amDunl of dislilled-carhon adrlit~nilsa nd at diIIerenl sinlering tcmpcralures. X-ray diffifraction anvlyscs oI a hnquet rn~rhtre of steelmaking dusts(20Q didilled carhon and 10% waste pulp sblered ;>I SOOT) showcd thal the briquet consisted ot ZnO and Fc,O.,, hut was not found at the hriguet rintered at over 10OO'C. Crude zinc oxide sintered a1 IOOOC contained OZA Zn.

製鋼粉塵의 處理

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)