EQUIPMENT PARAMETERS FOR THE USE OF SODIUM SLURRY IN THE EXTINGUISHING OF WASTE HEAPS

Abstract

Purpose. To investigate and propose the parameters of equipment for the safe treatment of waste heaps with sodium slurry to eliminate their spontaneous combustion. Methods. Study and classification of literature sources. Interviewing experts in the field of pipelines, pumps, conveyors, nozzles and grinding equipment. Generalisation and systematisation of the information obtained. Results. It has been established that in order to determine the parameters of equipment for extinguishing waste heaps, it is necessary to determine the degree of viscosity of the inhibitor suspension. The results of the coefficients of dynamic viscosity of three inhibitor suspensions based on substances (NaHCO3, Na2CO3, and NaOH) were obtained. Laboratory experiments were carried out three times. The process of preparing the inhibitor suspension involved adding 10 g of soda powders (NaHCO3, Na2CO3 and NaOH) to a 400 ml flask of water, as well as 5 g of kaolin clay and 5 g of bentonite clay. As a result, three types of suspensions with a concentration of 5% were obtained. The viscosity of the inhibitor suspension was measured using a viscometer with a 4 mm diameter orifice. Scientific novelty. It consists in a systematic analysis of equipment parameters for the efficient use of sodium slurry in extinguishing waste heaps. The importance of identifying and selecting materials that are resistant to the transport of this slurry, which will significantly extend the service life of equipment in an aggressive environment, is highlighted. This approach offers new opportunities for optimising the process of extinguishing waste heaps and increasing the efficiency of sodium slurry use. Practical implication. The obtained results are of great scientific and practical importance when selecting the optimal parameters of equipment for extinguishing waste heaps. The 6 components that should be considered include pipeline materials, pumping equipment, nozzles, tanks, mobile jaw crusher, and inhibitor slurry. The first step in selecting equipment parameters is to study the physical and chemical effects of the inhibitor slurry on the transported waste material, hydrophobicity and environmental resistance. These data will allow for the optimal selection of equipment parameters for extinguishing waste heaps. The study also provides important information on the estimated cost of equipment materials, which makes it possible to estimate the cost of creating the necessary equipment. The estimated price of USD 167,521, excluding consumables, helps in planning financial resources when selecting equipment.