Dissertation > Excellent graduate degree dissertation topics show

Study on Formation Mechanism of Blast Furnace Hearth Sediment of High Alumina and Titanium

Author: ChenHongJian
Tutor: LvQing
School: Hebei University of Technology
Course: Iron and steel metallurgy
Keywords: Blast furnace Vanadium-titanium magnetite Hearth sediments Ti ( N , C )
CLC: TF549
Type: Master's thesis
Year: 2008
Downloads: 37
Quote: 0
Read: Download Dissertation

Abstract


Chengde Steel blast furnace smelting of vanadium-titanium magnetite found in the overhaul of the blast furnace blast furnace bottom and hearth in the presence of large amounts of sediment , sediment bottom of the pot - shaped distribution in the hearth , a serious impact on blast furnace anterograde . This article studies the causes and mechanism of the Order of the steel, aluminum, titanium sediment . Sediment composition and properties of bearing steel blast furnace hearth , the results show that the order of the BF sediment was black , wrapped with a metallic luster iron , high hardness, and the molybdenum disilicide furnace in 1600 when softened but does not melt . High-melting substances in sediments spinel and TiC , TiN and their solid solution of Ti ( N , C ) and Ti ( C , N ) . TiC is mainly distributed in the circumference of the metallic iron , the main aggregates of Ti ( C , N ) and Ti ( N , C ) and the compound dispersed in the spinel or aluminum di - calcium and rutile . The sediment can be divided into molten iron layer the titanium deposition layer and transition erosion layer . Molten iron layer containing metallic iron ; the lower portion of the molten iron layer deposited layer is titanium , titanium carbide and titanium nitride, and solid solutions thereof , and magnesium aluminate spinel ; transition erosion layer erosion of the refractory material to molten iron and slag from the upper to the next , aluminum and silicon content increases gradually, iron, titanium content decreased . Hearth deposit formation mechanism: titanium slag and coke generated TiC a direct reduction reaction , with the formation of the liquid iron and slag TiC iron drops adsorption , wrapped around the iron drops . TiC wrapped in liquid iron from sinking to the bottom of the furnace to form a hearth sediments ; slag - iron interface and hot metal - hearth refractories interface due to the existence of concentration and temperature gradients precipitation of Ti ( N , C ) . Ti ( N , C ) , the reunion of molten iron and slag formed in the hearth hearth sediments . Order of BF deposit formation is mainly due to the presence of large amounts of carbon and aluminum slag viscosity increases , reducing the fluidity of the slag , the slag in the slag in the high-melting substance enriched sediment formed . Obtained by experiment to ensure blast furnace anterograde Chengde Steel blast furnace slag basicity should be controlled at about 1.02 and not more than 1.22 . Slag MgO content between 11.95% to 13.95% . Use of the pyrolusite washing furnace can reduce the melting point of the sediment , eliminate sediment .

Related Dissertations

  1. The Application of STIR-FLAIR and T2W-SPIR for Diagnosing the Orbital Lesions: a Contrast Study,R777
  2. The PLC Design and Implementation of Blast Furnace System Based on Experts-learning Algorithm,TP273
  3. Study on the Stoichiometric Ratio of Material and Reducing- Reoxidation Technology of Laminated PTCR,TN605
  4. Ti / RuO 2 -IrO 2 -SnO 2 -Sb 2 O 5 Preparation and Application of anode,X703
  5. Heat Treatment of Cast Al-Cu-Ti-(La) alloy microstructure and mechanical properties of,TG166.3
  6. Situ (Ti, W) C particle reinforced steel matrix composites and organizational performance research,TB331
  7. Ti-based lead dioxide electrode doped tin Preparation and Catalytic Activity,X703
  8. Electrocatalytic oxidation dye wastewater treatment,X703
  9. Ti / TiO 2 -NTs/PbO 2 Electrode Preparation and Electrochemical degradation of DNT wastewater,X703
  10. ZigBee-based indoor positioning system communication Hospital Research and Implementation,TP212.9
  11. Mechanics Characteristic Research on the Blast Furnace Slag Foundation Soil of Panzhihua Iron and Steel Co,TU411.3
  12. Preparation and Property-research of BiFeO3 Ceramics and Thin Solid Films,O484.1
  13. Magnesium slag , red mud ceramic filter balls resource utilization Experimental Study of As removal from wastewater,X703
  14. Theoretical and Experimental Study on Dry Centrifugal Granulation of Blast Furnace Slag,X757
  15. Preparationand Performance Evaluation of SnO2 Electrode with Long Service-life,X703.1
  16. Study on Treating Organic Waste-water by Photoelectrocatalytic Oxidation Pillared Clay Mineral Materials,X703
  17. The Quality Control and Improvement of the Production Process for Large-scale Blast Furnace,F426.31
  18. The microwave heating vanadium titanomagnetite concentrate preparation of natural micro - alloy iron powder new technology research,TF123.21
  19. Research on a Class of Uncertain Dmc Method in Blast Furnace,TF543
  20. Micro Ti pipeline weld heat affected zone properties,TG401
  21. Properties and microstructure of powder metallurgy molybdenum alloy hot forging,TG319

CLC: > Industrial Technology > Metallurgical Industry > Ironmaking > Blast furnace operation > Blast furnace failure and to prevent
© 2012 www.DissertationTopic.Net  Mobile