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研究生:焦聖傑
研究生(外文):Sheng - Chieh Chiao
論文名稱:造渣劑對熔融還原煉鐵法脫硫之影響
論文名稱(外文):Measurement of Sulfide Capacity and Sulfur partition ratio in Bath Smelting Slags
指導教授:連雙喜
指導教授(外文):Shuang-Shii Lian
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:材料科學與工程學研究所
學門:工程學門
學類:材料工程學類
論文種類:學術論文
論文出版年:2000
畢業學年度:88
語文別:中文
論文頁數:100
中文關鍵詞:熔融還原煉鐵脫硫硫分配比高溫爐
外文關鍵詞:Bath SmeltingSulfide CapacitySulfur partition ratioCaO-MgO-FeO-Al2O3-SiO2Slags
相關次數:
  • 被引用被引用:1
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摘 要
熔融還原煉鐵製程為目前國內外所重視的煉鐵製程之一,而其中爐渣成份及其反應將影響熔融還原製程之成敗,而爐渣對脫硫之影響更是決定鐵水品質之好壞。本研究主要探討熔融還原煉鐵製程爐渣對脫硫之影響,並配合目前文獻所蒐集到的脫硫能力計算模式加以探討。在實驗方面,對FetO-CaO-MgOsat-SiO2-Al2O3等五元爐渣系統進行實驗分析,並將實驗結果與各相關文獻及脫硫能力計算模式進行比對。由實驗結果發現,渣中脫硫能力(Cs)與鹽基度(Basicity)成正比,亦與FetO含量成正比,而鐵渣分配比(Ls)與鹽基度成正比而與FetO含量成反比。在脫硫能力計算模式方面,以Tamura及Pelton所提供的脫硫計算模式之計算結果最接近本次實驗值,故利用該脫硫模式可對七元溶液FeO-CaO-MgO-SiO2-Al2O3-MnO-Fe2O3進行模擬分析,圈選出熔融還原爐渣可能之成份範圍,作為未來配渣之參考依據。
ABSTRACT
During the past decade there has been a tremendous world wide effort to develop direct ironmaking processes that use coal in place of coke and have lower capital costs than the traditional blast furnace and coke oven route. A family of processes based on “bath smelting” of iron oxides using coal directly. However, the sulfur in base smelting was higher than traditional blast furnace and affected iron’s quality. Sulfur removal in ironmaking processes is now of even more importance than in the past. In order to understand the desulfurization phenomena, it is important that the sulfide capacities of slags and sulfur partition ratio between slags and iron are well known. In this paper, the sulfur partiton ratio between MgO-saturated slags(CaO-FetO-MgOsat-SiO2-Al2O3) and iron and the sulfide capacity of these slags have been measured at 15000C.
From the obtained results, it was confirmed that both the surfide capacity and the partiton ratio increase with basicity(CaO/SiO2). The sulfide capacity also increases with FetO content(FetO < 8%),but the partiton ratio decreases with FetO content.
目 錄
第一章 前言-------------------------------------------------1
第二章 文獻回顧與理論基礎-----------------------------------3
2 - 1 熔融還原法脫硫相關文獻參考--------------------------3
2 — 2 脫硫能力評估與探討----------------------------------9
2 — 2 - 1 Sulfide Capacity 定義與應用-----------------9
2 — 2 — 2 氧分壓求法---------------------------------10
2 - 2 — 3 硫氣分壓求法-------------------------------10
2 - 2 - 4 Sulfide Capacity (Cs) 與 Sulfur partition
ratio (Ls)之關係---------------------------11
2 — 2 - 5 多元渣系中各成份與脫硫能力之關係-------------11
2 — 3 多元渣系脫硫計算模組-------------------------------17
2 — 3 — 1 Tamura’s Model----------------------------17
2 — 3 — 2 Pelton and Eriksson’s Model---------------17
2 - 3 — 3 Sichen and Seetharaman’s Model------------19
2 — 3 — 4 Sosinsky and Sommerville’s Model----------19
2 — 3 — 5 Ting Tsao’s Model-------------------------22
2 - 3 — 6 脫硫模組探討---------------------------------22
2 — 4 低氧化鐵渣中氧化鐵活性的探討------------------------24
2 — 4 — 1 Ls與氧化鐵活性之關係-----------------------24
2 — 4 — 2 FeO活性與含量之關係------------------------26
2 — 4 — 3 活性計算模組的運用-------------------------29
2 — 4 — 4 Pelton’s Model 的應用---------------------31
2 — 4 — 4 —1 Pelton’s Model 理論概述--------------------31
2 - 4 - 4 - 2 F*A*C*T 熱力學軟體----------------------------33
2 - 4 - 4 — 3 兩兩成份配對參數之蒐集-----------------------34
2 — 4 — 4 — 4 利用數據回歸分析求解未得到之溶液參數--------35
2 — 4 — 4 — 5 七元爐渣資料庫與文獻比對--------------------37
第三章 實驗設備及步驟--------------------------------------40
3 — 1 脫硫實驗----------------------------------------40
3 — 1 — 1 實驗設備---------------------------------40
3 — 1 —2 實驗原理---------------------------------41
3 — 1 — 2 — 1 由實驗求出 Cs-------------------------------43
3 — 1 — 2 — 2 由實驗求出Ls--------------------------------43
3 — 1- 3 實驗前準備工作------------------------------43
3 — 1 — 3 — 1 儀器校正-----------------------43
3 — 1 — 3 — 2 氧化鋁管氣密測試---------------46
3 - 1 — 3 — 3 氧化鋁管溫度校正-----------------46
3 — 1 — 3 — 4 氧化物粉末準備------------------49
3 - 1 — 3 — 5 熔渣製作-------------------------49
3 — 1 — 4 平衡時間的決定-----------------------------50
3 — 1 — 5 實驗樣品成份-------------------------------52
3 — 1 — 6 脫硫實驗步驟-------------------------------55
3 — 1 —7 取樣分析步驟--------------------------------57
3 — 1 — 8 注意事項-----------------------------------57
第四章 結果與討論------------------------------------------59
4 — 1 Cs與Basicity及FeO含量之間的關係------------------59
4 — 2 Ls與Basicity之間的關係---------------------------62
4 — 3 Ls與FeO含量關係圖--------------------------------62
4 — 4 各文獻提供Model與實驗數據比較---------------------65
4 — 5 計算Ls與實際Ls之比較------------------------------68
4 — 6 擬三相圖圈出熔融還原法爐渣可能的成份範圍----------69
4 — 7 實驗檢討與改進------------------------------------73
第五章 結論------------------------------------------------75
第六章 未來展望--------------------------------------------76
第七章 參考文獻--------------------------------------------77
附錄一:回歸資料庫求算各Fe2O3參數----------------------------82
附錄二:氣體流量之間的轉換-----------------------------------87
附錄三:典型熔融還原爐反應示意圖[15]-------------------------89
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