SU1402895A1 - Method of determining tendency of coals to self-ignition - Google Patents

Method of determining tendency of coals to self-ignition Download PDF

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Publication number
SU1402895A1
SU1402895A1 SU853962049A SU3962049A SU1402895A1 SU 1402895 A1 SU1402895 A1 SU 1402895A1 SU 853962049 A SU853962049 A SU 853962049A SU 3962049 A SU3962049 A SU 3962049A SU 1402895 A1 SU1402895 A1 SU 1402895A1
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USSR - Soviet Union
Prior art keywords
samples
tendency
coals
minutes
determining
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Application number
SU853962049A
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Russian (ru)
Inventor
Павел Петрович Зайцев
Лариса Павловна Панченко
Олег Иосифович Прокопало
Евгений Михайлович Панченко
Евгений Витольдович Кучис
Original Assignee
Ростовский государственный университет им.М.А.Суслова
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Priority to SU853962049A priority Critical patent/SU1402895A1/en
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Publication of SU1402895A1 publication Critical patent/SU1402895A1/en

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Abstract

Изобретение относитс  к исследованию пожароопасности материалов путем определени  их физических свойств и предназначено дл  определени  склонности каменных углей к самовозгоранию. Цель изобретени  - уменьшение трудоемкости, упрощение прогнозировани . Цель достигаетс  пол ризацией образцов при их одновременном нагреве, вьщержке при данной температуре и последующем охлаждении. Склонность к самовозгоранию определ етс  соотношением знаков зар да поверхности образцов и пол ризующих электродов. (Л сгThe invention relates to the investigation of the fire hazard of materials by determining their physical properties and is intended to determine the tendency of the coals to spontaneously ignite. The purpose of the invention is to reduce the labor intensity, simplifying the prediction. The goal is achieved by polarizing the samples while heating them simultaneously, keeping them at a given temperature and then cooling them. The tendency to spontaneous combustion is determined by the ratio of the signs of the charge on the surface of the samples and the polarizing electrodes. (L cr

Description

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; Изобретение относитс  к исследованию пожароопасности материалов путем определени  их физических свойст1р и предназначено дл  определени  склонности каменных углей к самовозгоранию .; The invention relates to the study of the fire hazard of materials by determining their physical properties and is intended to determine the tendency of coal to spontaneously ignite.

Целью изобретени   вл етс  уменьшение трудоемкости, упрощённа прогнозировани .The aim of the invention is to reduce the labor intensity, simplified prediction.

Способ реализуетс  следующим образом .The method is implemented as follows.

j Из испытываемых углей приготавли- |вают образцы в виде дисков диаметром ;15 мм и толщиной 2 мм. Полученный об- |разцы помещают между накладными металлическими электродами из нержавею- 1цей стали и подвергают действию посто нного злектрического пол  напр - женностью 11-13 кВ/см при нагреве до 80-100 С в течение 20-30 мин, выдержке образцов при зтой температуре в течение 50-60 мин и охлаждении до Комнатной температуры в течение 20- 30 минсj Prepare samples in the form of discs with a diameter of; 15 mm and a thickness of 2 mm. The obtained samples are placed between the superimposed metal electrodes of stainless steel and subjected to a constant electric field of 11–13 kV / cm when heated to 80–100 ° C for 20–30 min, holding the samples at this temperature. for 50-60 minutes and cooled to room temperature for 20-30 minutes

Потенциал внешнего электрического Пол  ( пол ризованных образцов определ ют компенсационным методом с точностью ±1 В. По знаку i определ The potential of the external electric field (the polarized samples are determined by the compensation method with an accuracy of ± 1 V.

5 0 5 5 0 5

ют склонность углей к самовозгоранию: образцы углей, у которых знак if совпадает со знаком накладного пол ризующего электрода, обладает склонностью к самовозгоранию; образцы углей, у которых знак tf противоположен знаку накладного пол ризующего электрода, не склонны к самовозгоранию.Coal inclination to spontaneous combustion is typical: coal samples in which the if sign coincides with the sign of the surface polarizing electrode have a tendency to spontaneously ignite; Coal samples, in which the tf sign is opposite to the sign of the surface polarizing electrode, are not prone to spontaneous combustion.

Claims (1)

Формула изобретени Invention Formula Способ определени  склонности каменных углей к самовозгоранию путем нагрева и,измерени  физических характеристик образцов одинаковой геомет рической формы, отличающий- с   тем, что, п целью уменьшени  трудоемкости, упрощени  прогнозировани , образцы подвергают действию nor сто нного электрического пол  напр женностью 1-13 кВ/см при нагреве до 80-JOO°C в течение 20-30- мин, вьщер- живают образцы при этой температуре в i течение 50-60 мин, охлаждают до комнатной температуры в течение 20-30 мин и измер ют потенциал внешнего электрического пол  пол ризованных образцов, по знаку-которого определ ют склонность углей к самовозгоранию.The method for determining the propensity of coals to spontaneous combustion by heating and measuring the physical characteristics of samples of the same geometric shape, characterized in that, in order to reduce labor intensity, simplify prediction, the samples are exposed to a normal electric field of 1-13 kV cm when heated to 80-JOO ° C for 20-30 minutes, sample is imbedded at this temperature for i 50-60 minutes, cooled to room temperature for 20-30 minutes and the potential of the external electric field is measured ri samples, the sign of which determines the tendency of coal to spontaneously ignite.
SU853962049A 1985-10-02 1985-10-02 Method of determining tendency of coals to self-ignition SU1402895A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU853962049A SU1402895A1 (en) 1985-10-02 1985-10-02 Method of determining tendency of coals to self-ignition

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101271053B (en) * 2007-12-07 2011-01-26 辽宁工程技术大学 Self-ignition fatalness decision method of coal
CN104297322A (en) * 2014-10-30 2015-01-21 太原理工大学 Electrochemical measurement method for coal spontaneous combustion tendency

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Временна инструкци по определению склонности твердых веществ и материалов к тепловому самовозгоранию. М., ВНИИПО, 1970, К 18-20. Авторское свидетельство СССР № J045099, кл. G 01 N 25/50, 1983. . *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101271053B (en) * 2007-12-07 2011-01-26 辽宁工程技术大学 Self-ignition fatalness decision method of coal
CN104297322A (en) * 2014-10-30 2015-01-21 太原理工大学 Electrochemical measurement method for coal spontaneous combustion tendency
CN104297322B (en) * 2014-10-30 2016-08-17 太原理工大学 A kind of electrochemical determination method of coal ignitability

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