Abstract
By using the method of mixing the dependence of changing of enthalpy of specimen of siderite ore and agglomerates on temperature was found. The interpolational equations were formed on the basis of the received data, they represent that dependence for enthalpy, original and average heat capacity in broad interval of temperatures. The possibility of application of the method of additive calculation for determination of heat capacity and enthalpy of agglomerates and ore with sufficient exactness for engineering practice was defined. According to the results of measuring heat capacity, density and coefficient of temperature conductivity, the dependence of the coefficient of temperature conductivity of siderite ore on temperature was defined. The received data permit forming the thermal balances of separate zones of shaft-furnace for roasting siderite ore and basing the optimum value of the consumption of solid fuel at agglomeration and also optimizing constructive and operating parameters of the work of thermal aggregates designed for heat treatment of siderite ore and receiving agglomerates.
Highlights
By using the method of mixing the dependence of changing of enthalpy of specimen of siderite ore and agglomerates on temperature was found
The interpolational equations were formed on the basis of the received data
they represent that dependence for enthalpy
Summary
ИЗУЧЕНИЕ ТЕПЛОФИЗИЧЕСКИХ СВОЙСТВ КАРБОНАТНОЙ СИДЕРИТОВОЙ РУДЫ И АГЛОМЕРАТОВ НА ЕЕ ОСНОВЕ. С использованием метода смешения найдена зависимость изменения энтальпии образцов сидеритовой руды и агломератов на ее основе от температуры. Составлены уравнения, отображающие эту зависимость для энтальпии, истинной и средней теплоемкостей. В процессе монотонного нагрева образцов цилиндрической формы проведено измерение коэффициента температуропроводности как для сырой, так и обожженной сидеритовой руды. Плотности и коэффициента температуропроводности определена зависимость коэффициента теплопроводности сидеритовой руды от температуры. Полученные данные могут быть использованы для составления тепловых балансов отдельных зон шахтной печи для обжига сидеритовой руды и определения оптимального расхода твердого топлива при агломерации. Ключевые слова: сидеритовая руда, агломерат, температура, энтальпия, теплоемкость, плотность, коэффициент температуропроводности, коэффициент теплопроводности, шахтная печь, параметры, тепловой агрегат, термообработка. STUDYING OF THERMOPHYSICAL PROPERTIES OF CARBONATE SIDERITE ORE AND AGGLOMERATES ON ITS BASIS
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