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Method and device for measuring expansion and contraction properties of production coal

A technology of expansion and contraction and measurement method, which is applied in the direction of measuring devices, material thermal analysis, instruments, etc., can solve the problem of huge cost, and achieve the effect of reducing fuel consumption, reducing damage and improving quality of blast furnace

Active Publication Date: 2020-05-22
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the lack of oil resources in our country, the dependence on foreign countries exceeds 40%. In order to alleviate the lack of oil, many scientific researchers have carried out research on the use of coal for liquefaction to produce industrial oil, but the cost of this process is quite huge.

Method used

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  • Method and device for measuring expansion and contraction properties of production coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Put 2000g of coal samples with Ad content of 6%, Vd content of 25% and 80% of the coal samples to be measured with a particle size less than 3mm into a stainless steel tube 1Cr18Ni9Ti with an inner diameter of 100 mm and a height of 300 mm. Cardboard, the coal sample to be measured is naturally piled up to a density of 820 kg / m3 to become a coal block to be measured; after treatment, the coal block to be measured together with the cardboard is taken out of the stainless steel tube and placed in a vertical heating furnace with an inner diameter of 200mm. Heating was controlled by program, and the heating rate was 1°C / min. During the heating process, when the coal material reaches a certain temperature in the furnace, the coal sample begins to expand and contract. Diameter value, the maximum expansion rate of the coal block to be measured is calculated to be 52%, and the maximum shrinkage rate is 35%.

Embodiment 2

[0035]Put 2000g of coal samples with 80% Ad content and 27% Vd content and 80% particle size less than 3mm to be measured into a 1Cr18Ni9Ti stainless steel tube with an inner diameter of 100 mm and a height of 300 mm. Cardboard, the coal sample to be measured is compacted to a density of 1080 kg / m3 to become a coal block to be measured; after treatment, the coal block to be measured together with the cardboard is taken out of the stainless steel tube and placed in a vertical heating furnace with an inner diameter of 200mm. Heating was controlled by program, and the heating rate was 2°C / min. During the heating process, when the coal material reaches a certain temperature in the furnace, the coal sample begins to expand and contract. Diameter value, the maximum expansion rate of the coal block to be measured is calculated to be 61%, and the maximum shrinkage rate is 42%.

Embodiment 3

[0037] Put 1500g of coal samples to be measured with 10% Ad content and 28% Vd content and 83% particle size less than 3mm into a 1Cr18Ni9Ti stainless steel tube with an inner diameter of 100 mm and a height of 300 mm. Cardboard, the coal sample to be measured is naturally piled up to a density of 820 kg / m3 to become a coal block to be measured; after treatment, the coal block to be measured together with the cardboard is taken out of the stainless steel tube and placed in a vertical heating furnace with an inner diameter of 200mm. Heating was controlled by program, and the heating rate was 3°C / min. During the heating process, when the coal material reaches a certain temperature in the furnace, the coal sample begins to expand and contract. Diameter value, the maximum expansion rate of the coal block to be measured is calculated to be 89%, and the maximum shrinkage rate is 56%.

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Abstract

The invention relates to the field of coking coal quality detection, and in particular, relates to a method and device for determining the expansion and shrinkage performance of coal. The method for determining the expansion and shrinkage performance of the coal for production comprises the steps: selecting a to-be-determined coal sample as a to-be-determined coal block with standard size; and heating the to-be-determined coal block to a standard heating temperature, recording sizes of the coal block at various stages in the heating process, and calculating to obtain the maximum expansion rate and the maximum shrinkage rate of the to-be-determined coal block. The device for determining the expansion and shrinkage performance of the coal for production comprises a heating furnace, a coal sample supporting plate, a positioning push plate, a push rod and a temperature controller; a moving pair is formed between the push rod and the furnace wall of the heating furnace, and the push rod is provided with a scale. The expansion and shrinkage process behaviors of pyrolysis of the coal for production in a carbonization chamber are simulated, and the real change conditions of matching coal in the coking carbonization chamber are reflected, so that the expansion and shrinkage performance of the coal for production is tested, guidance is provided for mutual cooperation of the coal for coking production, and thus the matching coal production cost can be reduced and the production quality of coke is increased.

Description

technical field [0001] The invention relates to the field of coking coal quality detection, in particular to a method and device for measuring coal expansion and contraction properties. Background technique [0002] my country has abundant coal resources, and in the process of energy utilization, the dependence on coal is relatively large. Coal workers have carried out many aspects of coal processing and utilization. Among them, the most widely used method is to use coal for high-temperature dry distillation to produce coke (CN1171807A, CN1465656A) for blast furnace ironmaking production. In addition, due to the lack of oil resources in my country, more than 40% of our country depends on foreign countries. In order to alleviate the lack of oil, many scientific researchers have carried out research on the use of coal for liquefaction to produce industrial oil, but the cost of this process is quite huge. In addition, coal gasification is also used to obtain synthesis gas (CN...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/00
CPCG01N25/00
Inventor 王玉明毛晓明胡德生钱晖徐万仁
Owner BAOSHAN IRON & STEEL CO LTD
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