refractory lining in blast furnace pdf

7 Magnezit Group offers and supplies refractories in complex for Blast Furnaces lining. (5) Diatomaceous brick was developed (UK patent in 1893) as the first lining material specially designed for heat insulation. h��W{o�H�*�g�(���}�"�J�i����!.� The refractory lining is cooled to further enhance the protection against the dispatch of excess heat that can destroy the refractory lining. The main significant feature of blast furnace campaign life is cooling of refractory lining. This region of the BF exhibits more varied designs, conflicting practices and vastly different performance histories of the hearth lining. the blast furnace campaign to large degree [1-2]. Today the refractory lining is frequently maintained and improved by adding various elements such as titania. In 2009 a second partial repair was conducted in order to repair the refractory hearth lining around the tap hole. The cooling of refractory lining is the most contributing factor in deciding the Furnace campaign life. However, most of the lining works are made of certain standard refractory shapes and sizes which are always available in … Furnace Refractories . An EAF utilizes an 8 to 25 megavolt ampere transformer. The blast furnace ditch is a channel that leads to high-temperature molten iron or slag. * The refractory that is used to line the furnace must be suitable for the material being melted Refer to the refractory manufacture’s specifications. 171 0 obj <> endobj The torpedo measuring system allows immersion of a laser head into a hot torpedo ladle with surrounding temperatures of more than 1,000°C. Three electrodes for arc heating are inserted and the ladle acts as the furnace shell. %PDF-1.5 %���� Blast furnace cooling stave and refractory lining Dimensions of blast furnace cooling components and materials type are shown in Table 1 and Table 2 endstream endobj 172 0 obj <>/Metadata 16 0 R/Outlines 36 0 R/PageLayout/OneColumn/Pages 169 0 R/StructTreeRoot 39 0 R/Type/Catalog>> endobj 173 0 obj <>/ExtGState<>/Font<>/XObject<>>>/Rotate 0/StructParents 0/Type/Page>> endobj 174 0 obj <>stream The cooling of refractory lining can be done by stave cooler. The refractory lining can also resist thermal shocks, erosion, physical attack and chemical attack. Refractory and brick materials are needed to line huge shaft-like blast furnaces in which the molten pig is formed. At this stage the furnace is 'blown down' a new refractory lining is installed and the furnace is made ready for another 'campaign'. Early detection of refractory lining degradation is essential to avoid sudden furnace failures and prevent unscheduled shutdowns. The molten pig iron from the blast furnace is then sent to a brick- or refractory … Ladle furnaces are utilized to relieve the primary melter of secondary refining. 2. During This furnace has an historical rate production of 2.40ton/m 3.day. Benefits include improved safety, The production practice of the steel mill proves that this design structure can fully meet the normal service life of the blast furnace for 12-15 years. Refractory Lining of Hot Torpedo Ladles This paper introduces the world’s first laser profile measurement system for the refractory lining of hot torpedo ladles, the LaCam®. United States Steel Corporation 6 Ironmaking Refractory Technology Refractory Requirements BF Hearth ... • Selection of refractory lining materials and designs are critical for safe, stable, … aggregates lining. Refractory lining of blast furnace A modern blast furnace (BF) is refractory lined to protect the furnace shell from the high temperatures and abrasive materials inside the furnace. For defining the blast furnace campaign life, refractory lining play an important factor. If you are going to buy refractory lining in kilns, furnace or electric arc furnace, please contact RS Kiln Refractory Company! with refractory linings 2.1. 6G}|��Y��@��N�;�h���ٟ���0�CE��E�p5D�VKD���Q\1b�F̀�#!G���E�?��P���5d��9w�`�z��v�lhw�|/�����7ɚ� ;:� =vEO耞'�bµ Q�L�6Ƙ@�+:*ַ��,^'YA8�^��M�}.�w�,/��|�%�2h(�DT(C�p+�?� �z�x��@O�kL�ֽ�ȧx��܆�4_/��A��oϼ��������0�|�,)#+^���H�4vv���+;���v1�^�:I�ټ ��kR��@i�6D The cooling of refractory lining can be done by stave cooler. Carbon blocks used for blast furnace hearth lining One of the largest users of refractory materials in a blast furnace (BF) is the BF hearth. endstream endobj startxref The refractory wall lining typically measures two feet or more in thickness and contains more than 2,500 tons of refractories. Monitoring the refractory lining integrity is essential to assure the safety of the operators and to determine the remaining campaign life of a furnace. (4) Various new techniques were developed in the fields of furnace construction, cooling of refractory lining, and heat insulation, and they were incorporated as the core constituents of refractory tech-nology. r'fàm•©îœ¹þ™NËlÌê´5eԀ¤7OG’õÕzÿ Ü%ªÌŔbß €†YTÖ=›?$Ê From a materials requirements perspective, a blast furnace refractory lining may be split into five areas from top to bottom. Highly wear-resistant and temperature change-resistant corundum brick pre-fired at up to 1700 °C withstands the mechanical stresses in the top of the blast furnace where the burden is … In the production process, it is subject to the destruction of several factors as follows: (1) Severe erosion and erosion of flowing high-temperature molten iron and slag. 197 0 obj <>stream number of years until the refractory lining of the furnace begins to fail. The #2 blast furnace hearth lining of Companhia Siderurgica Nacional (CSN) are composed graphite refractory blocks. Queen Victoria Furnace 8 The Queen Victoria Furnace was first 'blown in' on 29 July 1954 having been constructed as an apparent The refractory lining with stave 3D model in blast furnace is analyzed and design by using the ANSYS software. A thin furnace lining structure with an integrated refractory brick wall is adopted, and the lining of cast iron cooling plate refractory brick is integrated with the cooling wall by cold setting. refractory lining. Lining cooling by stave technology is one of the products of such efforts. The company garnered acco-lades for the superior perfor-mance of the Lucy Furnace and began to expand rapidly, pushed in large measure by the explosive growth of the steel industry. for lining blast furnaces depending on the specific installation conditions and loading. the refractory lining pattern that has been observed during the last few years. 182 0 obj <>/Filter/FlateDecode/ID[]/Index[171 27]/Info 170 0 R/Length 69/Prev 137265/Root 172 0 R/Size 198/Type/XRef/W[1 2 1]>>stream Refractories for blast furnace tapping. Blast Furnace Ancillary Equipment-> Stoves, Bustle Pipe, Tuyeres. Ö#Ž­`fm^.1¦²¡_ÒáÔ¢=—n „g¹‚´®3w'eÊRG2éeOjïԋ ÏѨߦ—Á]qÄÈsÞÀœ‹–^®|—Т6š–¢koçë Õ²Î_z=À:ê6k%vþeÔ9¬s]s} D~M€ôòð}–ˆY$úê™ØãU3¤Ûk‘¦Ý#ü¤GÊý Ìaß¼ z5˜lddˆÝPêà**›»tuáÝÅ­K—bÛÿû ¯ÍÖîMÙG‚. Upper shaft: In this low temperature area, abrasion by the solid burden is the primary mode of wear. Campaign life of furnca ehave increased from 5 yrs -10-20ye and more these days. Now-a-days the campaign life of Blast Furnace is measured in terms of 10 15 yrs rather than 4 - 5 yrs - while on the other hand, the trend is to replace smaller Blast Furnaces with large capacity Blast Furnaces, efforts have been made to extend the campaign life of blast furnaces. The main reason is attributed to the severe infiltration of hot metal into the refractory lining.

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