Repair of Shaft Brick Lining within Clay-Stone Zone and Proposal of Alteration of the Polish Standard PN-G-14002:1997

2015 ◽  
pp. 177-186
Author(s):  
Roland Bobek ◽  
Tomasz Śledź ◽  
Adam Ratajczak ◽  
Wojciech Lekan ◽  
Piotr Głuch
Keyword(s):  
Brick Lining

Study on Thermal Operation and Design of Ring Furnace of the Pipe Rolling Plant

2019 ◽  
Vol 946 ◽  
pp. 468-473
Author(s):  
Natalia Shchukina ◽  
Nikolay Loshkarev ◽  
Vladislav Lavrov
Keyword(s):  
Fuel Consumption ◽  
Thermal Performance ◽  
Heat Balance ◽  
Rolling Stock ◽  
Pipe Rolling ◽  
High Productivity ◽  
Heating Furnaces ◽  
Brick Lining ◽  
Rolling Plant ◽  
Ring Furnace

High productivity of rolling and pipe rolling mills, good quality of finished metal products is possible to provide in the presence of powerful heating furnaces, well heating the metal with minimal oxidation and decarburization. Such conditions are provided by ring furnaces which are widely used for heating the preparations at rolling of pipes, wheels and bands of the railway rolling stock. The purpose of the heat – receiving structure of the metal, providing a set of physical and working properties, or impart to these materials the ductility required for subsequent machining. The article deals with the design and thermal performance of the ring furnace operating at ChelPipe’s Pipe Rolling Plant No.2. The problems arising during the operation of the thermal unit are analyzed. The paper describes the calculation of heating of metal and heat balance of the ring furnace. In the course of the analysis of the results of design studies, the shortcomings of the existing heat recovery system are revealed and measures for the reconstruction of the furnace to reduce fuel consumption and increase productivity (replacement of the existing brick lining with fibrous, the use of regenerative burners, the use of non-water-cooled partitions, etc.) are proposed. The paper analyzes the design and thermal performance of the ring furnace for heating of pipe billets before rolling. It shows a heat balance of the ring heating furnace and provides measures for furnace reconstruction aimed at reduction in fuel consumption and increase in efficiency: replacement of the existing lining with fiber lining, use of regenerative burners, application of non-water cooled walls.

Design on Closed Loop Soft Water Cooling System for Shougang Qiangang No.3 BF

2013 ◽  
Vol 634-638 ◽  
pp. 3123-3127
Author(s):  
Lin Li ◽  
Fu Ming Zhang ◽  
Yong Liu ◽  
Dai Jun Wang ◽  
Yong Qi Li
Keyword(s):  
Closed Loop ◽  
Cooling System ◽  
Soft Water ◽  
Design System ◽  
Corrosion Mechanism ◽  
Water Cooling ◽  
Full Account ◽  
Brick Lining ◽  
Lining Structure ◽  
Water Cooling System

Ability to improve cooling system, avoid untimely damage of BF lining and coolers, reduce maintenance frequency and prolong maintenance period during the furnace campaign, it is imperative for BF longevity. Describe development of cooling system, illustrate economic rationality and safe reliability of closed loop soft water cooling system, stress equipments, process, design, system measurement and control on closed loop soft water cooling system for Shougang Qiangang No.3 BF. Take full account of BF working condition, lining structure and corrosion mechanism, combine actual investment, choose advanced and rational coolers; develop segmentation design for cooling system, strengthen BF cooling effectively, boost system steering rate in order to reduce temperature of brick lining, prolong lifetime of brick lining, keep the lining integrity, maintain rational furnace profile, ensure BF production and longevity.

The Study on the Bond Strength between Gunning Formed Lining and Surface of Stave with Anchors

2011 ◽  
Vol 295-297 ◽  
pp. 765-768
Author(s):  
Feng Cao ◽  
Guo Xiang Pan ◽  
Hai Feng Chen ◽  
Pei Song Tang
Keyword(s):  
Blast Furnace ◽  
Service Life ◽  
Bond Strength ◽  
Bonding Strength ◽  
Research Work ◽  
The Past ◽  
Furnace Campaign ◽  
Campaign Life ◽  
Brick Lining ◽  
Optimizing Design

To prolong blast furnace campaign life, a great deal of research work has been carried out on the structure of stave cooler in the past decades, which, in turn, produced favorable results. However, due to the different thermal expanding property of the metal stave from that of the brick lining, the latter is subjected to crack, slide and damage. To solve the problem, a new stave cooler has been developed in this paper. Thus, a certain amount of anchors were welded on the traditional stave cooler, the unshaped gunning material can be fixed by anchors and the whole-lining be formed by gunning. The results of thermal simulating indicates: the bonding strength between the surface of stave cooler with anchors and the gunning lining is much higher than that between the surface of traditional stave cooler and the brick lining. Consequently, the service life of blast furnace will be extended. The optimizing design of the anchor was also described in the paper.

scholarly journals Evaluation of Chemical and Physico-Mechanical Properties of some Nigeria Natural Clays Samples for Foundry Applications

2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Yusuf L Shuaib-Babata ◽  
Abdulhafeez N Abdulrahaman
Keyword(s):  
Mechanical Properties ◽  
Bulk Density ◽  
Economic Recession ◽  
Linear Shrinkage ◽  
Apparent Porosity ◽  
Economic Activities ◽  
Medium Temperature ◽  
Iron And Steel ◽  
Brick Lining ◽  
Alumino Silicate

Studies have shown that Nigerian clays have not been fully utilized for foundry applications, either as refractories or even bonding clays, and are still being imported into the country. There is need to effectively exploit and adequately utilize the available natural resources to improve Nigeria economic activities, most especially during the present economic recession. Samples of clays were obtained from Auchi, Dada-Okelele (Ilorin), Kaba, Maraba-Rido, Mokwa and New-Bussa in Nigeria. The samples’ physico-mechanical properties were examined for its suitability for foundry/refractory applications. The results of the chemical analysis revealed that the samples belong to Alumino-Silicate refractories. The samples exhibited 35.3-96.2%, 17.1-28.7%, 1.72-2.34 g/cm3, 2.2-10.1%, 73-86 and >1300oC as values for percentage clay contents, apparent porosity, bulk density, permeability, linear shrinkage and refractoriness respectively. These values were within the standard range values of >35%, 22-30%, 17-2.4%, 2.0-10.1% and 25-90 required as percentage clay contents, apparent porosity, bulk density, permeability and linear shrinkage values respectively, for refractory clays/brick lining or alumina-silicates, kaolin and fireclays. Hence, the clays could suitably replace imported clays / ceramics in refractory applications, such as in production of earthen wares, chalk; as insulating refractories for casting and melting of low and medium temperature iron and steel. Appropriate utilization of these clays for local foundry applications will assist in addressing the problem of inadequate job, and over dependence on foreign goods.Keywords— Alumino-Silicate, Clay, Foundry, Moisture and Refractoriness

scholarly journals Investigation of Metal Air-Cooling Process as An Element of Thermal Processing

2019 ◽  
Vol 1 (2) ◽  
pp. 35
Author(s):  
Biryukov Alexey Borisovich ◽  
Gnitiev P. A.
Keyword(s):  
Heat Removal ◽  
Ceramic Fiber ◽  
Furnace Lining ◽  
Radiant Heat Transfer ◽  
Air Cooling ◽  
Ceramic Fibers ◽  
Technological Parameters ◽  
Conductivity Equation ◽  
Brick Lining ◽  
Coolant Delivery

<p>Background: Nowadays on metal tempering and annealing its air cooling (AC) is realized inside furnace with forced coolant delivery. Scientific tools lack for metal AC study and design is substantiated. The aim of this work is to investigate technological and design furnace parameters influence on metal AC duration, as well as disclosure of metal AC heat engineering regularities. Materials and method: For study mathematical model of metal AC is used. It bases on solving the differential non-stationary heat conductivity equation in one-dimensional form for cylindrical ingots and lining. Results: For three lining design types and different technological parameters operation acceleration possibility due to lining design change was studied. It is found that with ceramic fibers on walls and roof acceleration is 31-45% and with all lining made of ceramic fiber it is 44-52% as compared with fireclay brick lining. For a furnace with hearth of fireclay bricks and ceramic fiber on the walls and roof, convective component varies from 10 to 30%; for lining completely consisting of ceramic fibers it is 10 - 25%. When using fireclay brick lining parts their inner temperature is higher than for ceramic fiber up to 50 °C. Conclusions: Significant furnace lining materials type influence on metal AC intensity is proved. Heat removal mechanism on metal AC in furnace is disclosed, by establishing heat proportion directly removed from metal by convection. It is found that radiant heat transfer between metal and fireclay brick part of lining goes less intensively than with ceramic fiber part. </p>

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