Traditionally industrial processes using heat processing (steel, steel, cement, etc.) Have been supplied with refractory material forming (brick). The development of refractory concrete is relatively modern, the first concrete with low cement content, the CCB started to be marketed in the late eighties early nineties. We must differentiate conventional concrete refractory Amended itself, since the first were being used long before, of course its use was restricted to very specific areas of the furnaces and all adjacent facilities. This is an important fact to consider, despite the low yield and unreliability that these concretes had at elevated temperatures, yet they used. And this shows that the processing industry had a different material that had been using until then, basically brick and ceramic fibers. Another determining factor in the rise castables important that experienced from the moment they were introduced in the market, was the profound technological changes that marked the transition from wet kilns to dry kilns present in the manufacturing process of clinker (cement base component). The structural simplicity of the old wet kilns allowed easily clothe brick, which does not happen with the current, where the metal-mechanical complex structure makes the work of refractory coating forming a hard task, yet expensive, very expensive, the complexity of the work we must add the cost of the material is buoyed by the large number of different preform so varied that requires structure and the limited runs of each preforms.
Currently all repairs are made using refractory concrete, even where the original design with brick for repairs shall be replaced by concrete. New plants in its design include castables in much of the structure, saving the brick for easier application areas or areas where you can install concrete. Case of cement in rotary tube furnace for example. And this is also an important fact to keep in mind, the large engineering firms oven manufacturers have been reluctant until relatively recently introduced in its original designs concrete. They have been obliged to include in their designs by the pressure that customers themselves have built, to the numerous advantages to the unshaped refractories are formed on. Basically implementation time and cost much lower, in addition to other benefits such as improved performance for as which areas, and above all the infinite variety of forms that can be given as opposed to brick is limited by the preform.
The manufacturers of refractory concrete, for simplicity, can be divided into two categories, first are refractory manufacturers that have been made in concrete need to incorporate into its catalog of refractories, and concrete producers themselves said, that are the least, and they left with a distinct disadvantage from the outset. Refractory companies had formed a dominant position in the market, where new firms had to break into an unequal struggle against multinational corporations such as RHI http://www.rhi-ag.com/internet/en/ default.html or REFRATEKNIC http://www.refra.com/cms/es/1/P% C3% A1gina-of-onset . Yet few companies have made their way on the basis of quality and service. And these are the two key words for success.
QUALITY.: Keep in mind that quality is measured by a refractory performance it provides. Within any oven currently being carried out various physical and chemical processes that facilities subject to a severe test of attrition, develop different concrete for each of the different areas is essential and more today, where the introduction of alternative fuels (tires, organic waste, etc. ...) have completely changed the working conditions in most large ovens. Very few companies are responding to these needs. Also it is important to offer customers a range of products to maintain the required standards that require facilities and also enable it to be applied in different forms (cast, vibrated, gunned etc. ...) So that the customer has to choose to optimize their time and repair costs. As in the previous few companies can offer the full range of concrete as possible. Mention require separate sprayed concrete (shotcreeting) where only a few companies include it in their catalog. The performance of concrete is very much a good application, 50% of the success of a refractory concrete based on its correct application and here is where part of the service.
SERVICE.: Yes after-sales service is one of the pillars that sustains the success of a refractory concrete, is not only to control the product during application to study for each case the best how to carry out construction, expansion joints define (number and type), define the type of insulation, the thickness of it, bring new constructive ideas to improve the execution times, costs and if possible the subsequent performance and so much more. ultimately require a comprehensive study of what we would call engineering application. But as mentioned earlier, this is only a part of the service, the other part is the pre-sale service commercial work is not limited only to offer products in the catalog and expect the client to compare and choose. The pre-sales service is to prepare personnel in conjunction with the next repair facility, defining the different types of concrete for each of the zones, advising the best way to apply it to minimize costs, considering the conflict areas of their facilities to provide solutions that improve performance, etc. it is truly a continuous work throughout the year in order to get put as much concrete for repair work which requires a broad knowledge of all physical and chemical processes that occur within a oven.
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