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Method for detecting coke air hole characteristics

A detection method and technology of coke, which is applied in the detection of coke pore characteristics, in the field of detection of coke pore characteristics, can solve the problems of complicated operation, huge equipment, and pore damage, and achieve small equipment size, convenient operation and good repeatability Effect

Inactive Publication Date: 2013-03-20
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

This method needs to make coke light sheet, the equipment is huge and the operation is complicated
[0005] The above three methods of Chinese standard method cannot obtain the distribution of pores. Although the latter two methods can obtain the distribution of pores, the latter two methods need to make coke slices. During the production process, many medium and micro pores are destroyed. Pores are a specific test plane, so the representativeness of coke porosity detection is not strong

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  • Method for detecting coke air hole characteristics
  • Method for detecting coke air hole characteristics
  • Method for detecting coke air hole characteristics

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Embodiment Construction

[0027] The present invention is used to measure the porosity and pore distribution of coke produced by three different manufacturers, and at the same time, the porosity and pore distribution of the same coke are measured by scanning microscopy. Among them, the automatic nitrogen adsorption instrument adopts AUTOSORB-1-C-TCD from Quanta Company of the United States. The specific implementation steps are as follows:

[0028] Take 200g of each of the three coke samples, put them in a drying oven, and dry them at 105°C for 120min. After cooling, weigh 1-2g of the samples for use.

[0029] First, install the clean empty sample tube in the degassing station of the instrument, and vacuum degass it for 5±1 minutes. After the degassing is completed, backfill it with helium, remove the sample tube and immediately cover it with a rubber stopper, and weigh it. Put the coke sample into the sample tube, put the sample tube into the heating bag, fix it with a metal heating bag, and then ins...

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Abstract

The invention provides a method for detecting coke air hole characteristics. The method comprises the following step of: measuring the total volume of air holes contained in coke samples per unit mass by utilizing an automatic nitrogen absorption instrument, and then combining with real coke sample volumes, thereby obtaining the air hole rate of the coke samples. Capillary condensation phenomenon and volume equivalent exchange principle are utilized for determining pore diameter distribution by a gas absorption method, namely, liquid nitrogen amount filled in tested holes are equivalent to the volumes of holes. The method for detecting coke air hole characteristics provided by the invention is convenient to operate, is small in device volume, and has good repeatability.

Description

technical field [0001] The invention belongs to the field of detection of iron-making raw materials, in particular to a method for detecting the pore characteristics of coke, which is suitable for detecting the pore characteristics of coke. Background technique [0002] Coke is an important raw material for blast furnace ironmaking, and the pore characteristics of coke are one of the main factors determining the performance of coke [0003] The pore characteristics of coke mainly include porosity and pore distribution. At present, there are three detection methods for coke pore characteristics: national standard measurement method, image analyzer measurement method and scanning microscope method. [0004] National Standard Determination Method: GB / T 4511.1-2008 "Measurement Method for True Relative Density, False Relative Density and Porosity of Coke". This method requires a large amount of coke samples, and the degree of automation is not high. The error is larger. Image...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 国宏伟苏步新张建良任山邢相栋王春龙卢伟佳曹维超白亚楠李新宇
Owner UNIV OF SCI & TECH BEIJING
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