Abstract
Shown high perspectivity of production of wall ceramics products on the basis of fine-grained gob pile processed products with a high content of coal constituent. The characteristics of these materials, which are actually a ready-made ceramic fusion mixture, as well as the characteristics of the products obtained depending on the roasting temperature, are given. The established relationship between the various properties of the products obtained, the compressive strength of which is from 10 to 19 MPa, at a low density. Recommendations on the main technological parameters of production are given. It is emphasized that low prime cost of products is caused: excluding the costs of raw materials associated with the development and maintenance of fields; practical absence of costs for mass preparation; drying of products due to heat extraction from the furnace; lack of fuel costs necessary for roasting. It is pointed out that in the production of wall ceramics products based on fine-grained waste products of waste heaps, additional sources of income appear that are associated with a reduction in capital and current costs for the maintenance of dumps of FGPPP and the use of excess heat in various directions.
Highlights
Nowadays more and more attention for producing wall ceramics is attributed to different technogenic raw materials of coal variety
Special attention in the wall ceramics production should be attributed to roasting process
Taking into account that the fuel content in Fine-grained gob pile processed products (FGPPP) significantly exceeds the amount necessary for roasting, the furnace construction should provide an opportunity of extracting excess heat and gradual highly-controlled airing in the period of coal burning and carbon residue
Summary
Nowadays more and more attention for producing wall ceramics is attributed to different technogenic raw materials of coal variety This is determined by several reasons, major of them are: - the necessity to produce products in modern economic conditions at minimum net cost, that is achieved by reducing expenses on roasting and processing of raw material; - a growing demand for products of high efficacy with middle density class 0,7-0,8 (less that 700-800 kg/m3) and heat conduction coefficient of bond in dry condition until 0,20 Wt/ (m · °С). Independent gob pile development appeared to be quite problematic and costly for brick factories
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