Abstract
Experimental Research for Operating Thermal Electric Plant Ash in Coating Powder Production Used in the Continuous Steel Casting Lines
Highlights
Continuous improvement of the steel production requirements in terms of quality, the modernization of the steel elaboration and casting aggregates together with the developments in related technologies, lead to the implicit improvement of the disperser as part of the complex continuous casting plant equipment [1,2,3,4].At the same time, there is a qualitative improvement in refractory materials ancillary to casting, which plays a very important role in ensuring the purity of steel through the functions they perform.The processes that take place in the disperser during the casting of a batch, determine the purity of the steel
Chemical and thermal characteristics, pilot experimental batches were performed for testing in the steelworks
In the coating powder manufacturing technology, a limitation of the compositional variation for raw materials is required, as follows: - for metallurgical coke, a maximum of 10% ash is required and the free carbon is at least 90%, - for the thermal electric plant ash introduced in the raw materials recipe, contents of maximum 10% for Fe2O3 and maximum 20% for Al2O3 are required
Summary
Continuous improvement of the steel production requirements in terms of quality, the modernization of the steel elaboration and casting aggregates together with the developments in related technologies, lead to the implicit improvement of the disperser as part of the complex continuous casting plant equipment [1,2,3,4]. Technological powders used to cover the liquid surface of steel in the distributor are oxidative powdery materials classified as thermal insulating materials and are part of multi-component systems of the SiO2-CaO-Al2O3Fe2O3-MgO-K2O–Na2O type and consisting of at least 15% free carbon in various forms for calorific intake and melting delay. The performance of these powders influences the casting and solidification process of steel, including the accompanying dynamic processes, with effects on the quality of the surface and the internal structure of the continuous cast semi-finished product [2, 9,10,11]. In the coating powder manufacturing technology, a limitation of the compositional variation for raw materials is required, as follows: - for metallurgical coke, a maximum of 10% ash is required and the free carbon is at least 90%, - for the thermal electric plant ash introduced in the raw materials recipe, contents of maximum 10% for Fe2O3 and maximum 20% for Al2O3 are required
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