SU1305146A1 - Method for determining temperature of coke heat treatment - Google Patents

Description

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This invention relates to carbon-based materials technology, in particular, coke quality control. The aim of the invention is to improve the accuracy of determination.

In order to implement the method, a reference curve is required, which is made before the heat treatment of the batches.

The construction of the reference curve is carried out as follows.

A sample of non-heat-treated coke is sampled, divided into equal parts, crushed and scattered on the appropriate sieve to obtain the desired fraction. The samples thus obtained are placed in a graphite crucible and heat treated in an inert gas medium in the range of 800-2800 through 100-200 ° C. Heat treatment to 1200–1300 ° C is carried out in a furnace with silicon heaters, and in a furnace with graphite heaters (for example, in a Tamman furnace). The heating rate was 10 K / min, the exposure time at the final temperature was 1 h. After cooling, each sample was divided into several parts.

For all weights, the true density is determined according to GOST. Headecane is used as the immersion liquid, and ethanol is used as the washing liquid. For each sample, the results of several changes determine the average density value corresponding to a certain heat treatment temperature.

According to the measurement results for all the samples, the density curve is plotted

nosti.ot temperature Then measure

Editor N. Gunko Order 1381/20

Compiled by S. Kohan

Tehred A. Kravchuk Proof-reader I. Erdeyi

Mintage 588

Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Rauschska nab. D. 4/5

Production and printing company, Uzhgorod, st. Project, 4

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mud density according to the proposed method for the production batch.

Example 1. i kg of oil pyrolysis coke, obtained under a hard regime, is crushed and sieved to obtain a fraction of 1.6-1.25 mm, divided into 11 parts, each placed in a graphite crucible and heat treated in a sieve furnace and furnace Tamman at 1000-1400 C. After that, the density is determined by hexadecane with preliminary washing with ethanol. The dependence of density on heat treatment temperature is built, this value is determined for the production batch of coke, in this case it is equal to 1.859, which according to the calibration dependence corresponds to the heat treatment temperature of 1248 ° C. The accuracy of determining the temperature of heat treatment (when comparing, a certain temperature of heat treatment, with the temperature of heat treatment of the charge,

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Sa, calcined in a laboratory furnace with an accurate temperature measurement) is ± 7 ° C, labor costs 16 hours.

Claims (1)

Invention Formula The method for determining the temperature of heat treatment of coke by measuring the pycnometric density of a sample, comparing it with a reference density-temperature curve and determining the desired temperature, in that, in order to improve the determination accuracy, the sample is pre-rinsed with ethanol liquids use hexadecane. Subscription