REFRACTORY FOR LEAD FURNACE
FURMATS supplies refractory for lead furnace over 3 decades. Refractory material can be any material, which can withstand the action of abrasive or corrosive solids, liquids or gases at high temperatures are called ‘refractory’ material .The section of refractory material is depending upon the different characteristics for the construction of a furnace . now these days firebrick is the most common refractory material used at a large scale in the construction of small furnaces. we can also use other type of refractories for furnace construction they are high alumina brick, silica brick, magnesite brick, chromite brick, zirconia brick, monolithic etc.
The refractory linings in lead furnaces are exposed to several stresses rather complex in their interaction. In the present study the magnesia-chromite brick out of a lead recycling furnace suffered from a high chemical attack by the process slag. The high CaO, BaO and sulfur bearing silicate slag, as well as a high Na2O supply from soda resulted both in a deep-reaching infiltration of the brick microstructure and a severe corrosion of the brick components. Both the sintered magnesia and chromite were attacked chemically. The FactSage calculations showed the formation of high amounts of liquid phase in the infiltrated microstructure. Further phenomena affecting the refractory performance such as iron oxide attack, redox effects, and boron attack are also discussed in the paper. The obtained information and insights serve as a basis for improving refractory materials (i.e., choice of refractories for individual process and new developments) and consequently furnace operations.
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