釩鈦磁鐵礦流態(tài)化氣固直接還原基礎(chǔ)研究
發(fā)布時間：2021-04-10 06:27
隨著高品位含鈦礦石資源的快速消耗,近年來低品位含鈦礦石如釩鈦磁鐵礦中的鈦資源開發(fā)利用受到了廣泛關(guān)注。但在傳統(tǒng)高爐-轉(zhuǎn)爐流程中,由于工藝條件限制,只能利用鐵釩資源,鈦資源無法有效富集提取。直接還原-電爐熔分兩步法流程作為新一代非高爐冶煉工藝,被認為是實現(xiàn)釩鈦磁鐵礦鐵釩鈦資源綜合利用的有效方法。在現(xiàn)有直接還原設(shè)備中,相比豎爐、回轉(zhuǎn)窯、轉(zhuǎn)底爐,流態(tài)化直接還原具有直接利用粉礦和傳熱傳質(zhì)效率高的優(yōu)點,被認為是釩鈦磁鐵礦的非高爐冶煉最有前景的方法。釩鈦磁鐵礦由于自身復(fù)雜礦相組成和含鈦鐵氧化物特性,其直接還原過程相比較普通鐵精礦也更為復(fù)雜,所需還原勢高、還原效率低。因此,如何突破含鈦鐵氧化物的直接還原熱力學限制,并提高其直接還原效率,是釩鈦磁鐵礦兩步法流程的一個關(guān)鍵所在。本論文以南非某釩鈦磁鐵礦為實驗對象,系統(tǒng)研究釩鈦磁鐵礦原礦氣基直接還原特性,考察了氧化預(yù)處理對還原過程物相結(jié)構(gòu)以及流化特性的影響規(guī)律。取得的主要研究結(jié)果如下:（1）釩鈦磁鐵礦氣基直接還原過程物相轉(zhuǎn)變規(guī)律研究。在750-950°C范圍內(nèi),釩鈦磁鐵礦的直接還原過程按順序可分為三個階段,包括一般鐵氧化物還原（第一階段）,鈦鐵晶石還原（第二...
【文章來源】：中國科學院大學(中國科學院過程工程研究所)北京市
【文章頁數(shù)】：137 頁
【學位級別】：博士
【文章目錄】：
摘要
Abstract
CHAPTER 1 INTRODUCTION
1.1 Titanium mineral usage and resource
1.2 Titanium resource utilization process overview
1.3 Overview of titanomagnetite concentrate utilization technologies
1.3.1 Introduction of the blast furnace smelting process
1.3.2 Two step process of direct reduction-electric arc furnace （DR-EAF）smelting
1.4 Key issue of titanomagnetite direct reduction process
1.4.1 Composition of titanomagnetite and direct reduction characteristics
1.4.2 The defluidization problem during FB reduction
1.5 Research plan
CHAPTER 2 DIRECT REDUCTION BEHAVIORS OFTITANOMAGNETITE CONCENTRATE BY CARBON MONOXIDE
2.1 Introduction
2.2 Experimental
2.2.1 Experimental material
2.2.2 Experimental technique
2.2.3 Sample characterization
2.3 Results and discussion
2.3.1 Reduction of the SA TTM under CO atmosphere
2.3.2 Phase transformation behavior of the of SA TTM reduction
2.3.3 Reaction pathway for the CO reduction of the SA TTM
2.4 Summary of this chapter
CHAPTER 3 EFFECTS OF HIGH-TEMPERATURE PRE-OXIDATIONON THE TITANOMAGNETITE ORE STRUCTURE ANDREDUCTION BEHAVIORS IN FLUIDIZED BED
3.1 Introduction
3.2 Experimental
3.2.1 Experimental material and technique
3.2.2 Sample Characterization
3.3 Results and discussion
3.3.1 High temperature oxidation behavior of SA TTM
3.3.2 Effects of the pre-oxidation on the reduction
3.3.3 Effect of pre-oxidation on SA TTM equilibrium reaction path
3.4 Summary of this chapter
CHAPTER 4 EFFECTS OF LOW-TEMPERATURE PRE-OXIDATIONON THE TITANOMAGNETITE ORE STRUCTURE ANDREDUCTION BEHAVIORS IN FLUIDIZED BED
4.1 Introduction
4.2 Experimental
4.3 Results and discussion
4.3.1 Low temperature oxidation behavior of SA TTM
4.3.2 Effects of the pre-oxidation on the reduction
4.3.3 Effect of low temperature pre-oxidation treatment on SA TTM equilibriumreaction path
4.4 Summary of this chapter
CHAPTER 5 THE EFFECT OF PRE-OXIDATION ON THEFLUIDIZATION BEHAVIOR OF SA TTM
5.1 Introduction
5.2 Experimental
5.3 Results and discussion
5.3.1 Fluidization behavior of raw and pre-oxidized SA TTM
5.3.2 Effect of oxidation conditions
5.4 Summary of this chapter
CHAPTER 6 MAIN CONCLUSION AND OUTLOOK
6.1 Major innovations
6.2 Future plans
Reference
ACKNOWLEDGEMENT
CURRICULUM VITAE （WITH PUBLICATIONS）
【參考文獻】：
期刊論文
[1]釩鈦磁鐵礦流態(tài)化直接還原技術(shù)現(xiàn)狀與發(fā)展趨勢[J]. 孫昊延,朱慶山,李洪鐘. 過程工程學報. 2018(06)
[2]A novel process for the recovery of iron,titanium,and vanadium from vanadium-bearing titanomagnetite:sodium modification–direct reduction coupled process[J]. Yi-min Zhang,Ling-yun Yi,Li-na Wang,De-sheng Chen,Wei-jing Wang,Ya-hui Liu,Hong-xin Zhao,Tao Qi. International Journal of Minerals Metallurgy and Materials. 2017(05)
[3]電脈沖孕育處理對Zr基塊體非晶熱穩(wěn)定性及退火晶化的影響[J]. 孫昊延,王靜松,曹立軍,薛慶國. 材料熱處理學報. 2012(09)
[4]國內(nèi)外鈦白及海綿鈦主要原料產(chǎn)業(yè)現(xiàn)狀及我國發(fā)展重點[J]. 李興華,文書明. 鈦工業(yè)進展. 2011(03)
[5]Analysis on variety and characteristics of maghemite[J]. SHAW John,BLOEMENDAL Jan,HESSE Paul,ROLPH Tim. Science China（Earth Sciences）. 2010(08)
[6]世界鈦渣研發(fā)現(xiàn)狀與發(fā)展趨勢[J]. 周林,雷霆. 鈦工業(yè)進展. 2009(01)
[7]攀鋼釩鈦磁鐵礦資源綜合利用現(xiàn)狀與發(fā)展[J]. 鄧君,薛遜,劉功國. 材料與冶金學報. 2007(02)
[8]釩鈦磁鐵礦轉(zhuǎn)底爐直接還原綜合利用前景[J]. 洪流,丁躍華,謝洪恩. 金屬礦山. 2007(05)
[9]世界鈦渣生產(chǎn)技術(shù)現(xiàn)狀與趨勢[J]. 鄒建新. 輕金屬. 2003(12)
[10]釩鈦磁鐵礦高爐冶煉的強化[J]. 馬家源,孫希文,盛世雄. 鋼鐵. 2000(01)
本文編號：3129140
【文章來源】：中國科學院大學(中國科學院過程工程研究所)北京市
【文章頁數(shù)】：137 頁
【學位級別】：博士
【文章目錄】：
摘要
Abstract
CHAPTER 1 INTRODUCTION
1.1 Titanium mineral usage and resource
1.2 Titanium resource utilization process overview
1.3 Overview of titanomagnetite concentrate utilization technologies
1.3.1 Introduction of the blast furnace smelting process
1.3.2 Two step process of direct reduction-electric arc furnace （DR-EAF）smelting
1.4 Key issue of titanomagnetite direct reduction process
1.4.1 Composition of titanomagnetite and direct reduction characteristics
1.4.2 The defluidization problem during FB reduction
1.5 Research plan
CHAPTER 2 DIRECT REDUCTION BEHAVIORS OFTITANOMAGNETITE CONCENTRATE BY CARBON MONOXIDE
2.1 Introduction
2.2 Experimental
2.2.1 Experimental material
2.2.2 Experimental technique
2.2.3 Sample characterization
2.3 Results and discussion
2.3.1 Reduction of the SA TTM under CO atmosphere
2.3.2 Phase transformation behavior of the of SA TTM reduction
2.3.3 Reaction pathway for the CO reduction of the SA TTM
2.4 Summary of this chapter
CHAPTER 3 EFFECTS OF HIGH-TEMPERATURE PRE-OXIDATIONON THE TITANOMAGNETITE ORE STRUCTURE ANDREDUCTION BEHAVIORS IN FLUIDIZED BED
3.1 Introduction
3.2 Experimental
3.2.1 Experimental material and technique
3.2.2 Sample Characterization
3.3 Results and discussion
3.3.1 High temperature oxidation behavior of SA TTM
3.3.2 Effects of the pre-oxidation on the reduction
3.3.3 Effect of pre-oxidation on SA TTM equilibrium reaction path
3.4 Summary of this chapter
CHAPTER 4 EFFECTS OF LOW-TEMPERATURE PRE-OXIDATIONON THE TITANOMAGNETITE ORE STRUCTURE ANDREDUCTION BEHAVIORS IN FLUIDIZED BED
4.1 Introduction
4.2 Experimental
4.3 Results and discussion
4.3.1 Low temperature oxidation behavior of SA TTM
4.3.2 Effects of the pre-oxidation on the reduction
4.3.3 Effect of low temperature pre-oxidation treatment on SA TTM equilibriumreaction path
4.4 Summary of this chapter
CHAPTER 5 THE EFFECT OF PRE-OXIDATION ON THEFLUIDIZATION BEHAVIOR OF SA TTM
5.1 Introduction
5.2 Experimental
5.3 Results and discussion
5.3.1 Fluidization behavior of raw and pre-oxidized SA TTM
5.3.2 Effect of oxidation conditions
5.4 Summary of this chapter
CHAPTER 6 MAIN CONCLUSION AND OUTLOOK
6.1 Major innovations
6.2 Future plans
Reference
ACKNOWLEDGEMENT
CURRICULUM VITAE （WITH PUBLICATIONS）
【參考文獻】：
期刊論文
[1]釩鈦磁鐵礦流態(tài)化直接還原技術(shù)現(xiàn)狀與發(fā)展趨勢[J]. 孫昊延,朱慶山,李洪鐘. 過程工程學報. 2018(06)
[2]A novel process for the recovery of iron,titanium,and vanadium from vanadium-bearing titanomagnetite:sodium modification–direct reduction coupled process[J]. Yi-min Zhang,Ling-yun Yi,Li-na Wang,De-sheng Chen,Wei-jing Wang,Ya-hui Liu,Hong-xin Zhao,Tao Qi. International Journal of Minerals Metallurgy and Materials. 2017(05)
[3]電脈沖孕育處理對Zr基塊體非晶熱穩(wěn)定性及退火晶化的影響[J]. 孫昊延,王靜松,曹立軍,薛慶國. 材料熱處理學報. 2012(09)
[4]國內(nèi)外鈦白及海綿鈦主要原料產(chǎn)業(yè)現(xiàn)狀及我國發(fā)展重點[J]. 李興華,文書明. 鈦工業(yè)進展. 2011(03)
[5]Analysis on variety and characteristics of maghemite[J]. SHAW John,BLOEMENDAL Jan,HESSE Paul,ROLPH Tim. Science China（Earth Sciences）. 2010(08)
[6]世界鈦渣研發(fā)現(xiàn)狀與發(fā)展趨勢[J]. 周林,雷霆. 鈦工業(yè)進展. 2009(01)
[7]攀鋼釩鈦磁鐵礦資源綜合利用現(xiàn)狀與發(fā)展[J]. 鄧君,薛遜,劉功國. 材料與冶金學報. 2007(02)
[8]釩鈦磁鐵礦轉(zhuǎn)底爐直接還原綜合利用前景[J]. 洪流,丁躍華,謝洪恩. 金屬礦山. 2007(05)
[9]世界鈦渣生產(chǎn)技術(shù)現(xiàn)狀與趨勢[J]. 鄒建新. 輕金屬. 2003(12)
[10]釩鈦磁鐵礦高爐冶煉的強化[J]. 馬家源,孫希文,盛世雄. 鋼鐵. 2000(01)
本文編號：3129140
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