Сhobotko I.I., TynynaS.V. Methods and means for localization of focals of self-ignition of specific dumps

Details

Parent Category: Geo-Technical Mechanics, 2018

Category: Geo-Technical Mechanics, 2018, Issue 142

Geoteh. meh. 2018, 142, 134-140

DOI: https://doi.org/10.15407/geotm2018.142.134

METHODS AND MEANS FOR LOCALIZATION OF FOCALS OF SELF-IGNITION OF SPECIFIC DUMPS

Сhobotko I.I., Tynyna S.V.

Authors:

Сhobotko I.I., Graduate studen(NTU“Dniprovska Politechnica” MSE of Ukraine)

Tynyna S.V., Candidate of Technical Sciences (Ph.D.), Senior Researcher (IGTM, NAS of Ukraine)

UDC 622.504.75.05

Language: Russian

Annotation.

The chemical formulas for the interaction of calcium hydroxide with carbon dioxide dissolved in water, free carbonic acid with calcium and magnesium bicarbonate and excess of lime are given in the article, as well as methods and means for combating burning cells of waste heaps with the help of calcium hydroxide. The results presented in the article show the optimal choice of methods for preventing spontaneous combustion of waste heaps using calcium hydroxide, which has universal possibilities to neutralize rock spontaneous combustion by means of endogenous influence on the interfacial space with the absorption of thermal energy, which ensures the safety of the operation of dumps. Optimal proportional ratio of the limestone suspension and crushed lime mixed with fine sand and its influence on chemical processes of neutralization and deposition of iron oxides is determined, thereby ensuring absorption of gas emissions from the compounds of pyrite and sulfur anhydride contained in the waste heaps. The methods of applying the quenching of a flat and conical waste dump are considered. To prevent combustion of a flat dump, formation on the lateral surface of a protective layer of limestone suspension, which prevents manifestations of thermal depression in the forming or existing cell of the exothermic process, is substantiated. Formation of protective layer on the surface of a flat dump with the help of bulldozer method and by using a mixture of fine sand and quenched lime is considered. The technological scheme is presented for the installation for conical waste dump extinguishing by method of pumping solutions with limestone suspensions by injectors in the middle of the dump to the firing center. These actions primarily facilitate displacement of gases and sulfur vapor from the interfacial space, and combustion of harmful substances. The technological scheme and the main operating units of the installation help to effectively reduce the temperature contour throughout the dump, as well as to work for the short time to eliminate self-ignition of the dump directly by the influence on the fire cells.

Keywords:

сells of waste heaps, calcium hydroxide, carbon dioxide, limestone suspension, pyrite, sulfur anhydrite, bulldozer method, shingle dlime, waste heap, injectors, sparkplugs, interfractional space.

References:

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Abouttheauthors

Chobotko Igor Igorovich,Graduate studen tof the department of mining machines and engineering of the National Technical University "Dniprovska Polytechnic", Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Tynyna Sergei Vladimirovich,Candidate of Technical Sciences (Ph.D.), Senior Researcher in Department of Mechanics of elastomeric constructions of mining machines, M.S. Polyakov Institute of Geotechnical Mechanics NAS of Ukraine (IGTM, NAS of Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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