Detection method of pyrolysis-coking behavior of coal and apparatus therewith

Abstract

The invention discloses a detection method of a pyrolysis-coking behavior of coal and an apparatus therewith. The detection method includes following steps: selecting and installing the detection apparatus and performing detection, wherein the performing detection includes the steps of: preparing detection, manufacturing a paper tube, manufacturing a filter paper bar, manufacturing an asbestos round cushion, installing a coal cup, performing coal sample reduction, feeding the coal sample into a furnace, starting detection, and measuring obtained data. The apparatus is composed of: a comprehensive control cabinet, a precision electronic balance, a furnace body, a furnace body support, the coal cup, a coal cup support, a colloid layer measurement system, a pressurizing system, a volume curve measurement system, an upper-part structural support and a pressure controlling system. According to the invention, during detection of the thickness of a coal colloid layer and a volume curve, expansion pressure, heat absorption and release peak temperature, weight loss amount and weight loss rate are detected, so that the detection method includes many detection indexes and achieves more comprehensive detection result, thereby forming a detection method linkage mechanism. The detection method is high in precision of a result, is strong in reliability, and can show the property characteristics of coking coal, semi-coke and mature coke in a coke oven.

Description

technical field [0001] The invention relates to a method and a device for evaluating the quality of coking coal used in coke ovens, in particular to a method for detecting coal pyrolysis-coking behavior and a device thereof. Background technique [0002] There are many factors that determine the quality of blast furnace coke. In the current production of box-type coke ovens, under the condition that many factors have been fixed, the quality of coke mainly depends on the properties of raw coal. Coal is a rare complex substance in the world, and most of the coal used for coking is humic coal in the metamorphic stage of bituminous coal. The genetic factors that determine the properties of coal are very complex and are still unclear. They can be roughly divided into two genetic stages, namely, the geobiochemical action stage and the geophysical and chemical action stage. The former evaluation index is the total content of inert components ΣI, and the latter The evaluation index...

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Problems solved by technology

[0016] (1) The Y value measured by the glial layer index is 9.8×10 4 The Pa constant pressure test cannot fully simulate the pressure change of the coke oven wall on the coal; the detection index is mainly based on the number of colloids, and the detection index is less; the detection temperature is 250 ° C ~ 730 ° C, and the temperature range is relatively large It is narrow and cannot fully reflect the whole process of coal coking; the detection of the upper and lower layers of the colloidal layer depends on the operator's hand feeling, which requires strong experience

[0017] (2) The amount of samples detected by the Aurora expansion degree, the basic fluidity and the caking index are very small. Because coal is a heterogeneous substance, the detection error is large and the representativeness is poor; The b value is exaggerated, and the b value cannot be detected for coals with high and low metamorphic degrees; the basic fluidity test for strong caking coals is exaggerated, and it is not easy to determine the liquid phase generated during the heating process; the caking index needs to be applied to meet the requirements The standard anthracite coal, because the measurement conditions are not exactly the same, the comparability is poor

Though this measuring instrument has coal quality detection part function, can not reach the purpose of the present invention

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