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Method for detecting specific area of iron oxide powder

A technology of iron oxide powder and specific surface area, which is applied in the direction of measuring devices, individual particle analysis, scientific instruments, etc., can solve problems affecting economic benefits, etc., and achieve the effects of increasing selling prices, rapid detection, and reducing emissions

Inactive Publication Date: 2010-09-01
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is no suitable equipment and standard detection method for the detection of the specific surface area of ​​iron oxide powder, it has a lot of adverse effects on the sales of iron oxide powder, especially the difference between the sales price of iron oxide powder per ton tested and untested. More than 50 yuan, directly affect the economic benefits of the enterprise

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0017] The GeminiV2380 specific surface area measuring instrument produced in the United States is used, and liquid nitrogen, nitrogen and helium with a purity greater than 99.5% are prepared in advance. Then carry out detection according to the following steps and methods:

[0018] 1. Put the extracted iron oxide powder in the batch to be tested into an oven, and dry it at 150°C for 1 hour for degassing treatment;

[0019] 2. Weigh 1.5g of degassed iron oxide powder as a test sample;

[0020] 3. Pour the weighed sample into the analysis tube, and press it manually to ensure that there is no gap between the sample particles;

[0021] 4. Connect the analysis tube containing the sample to the clamp of the specific surface area measuring instrument, and evacuate the inside of the analysis tube into a vacuum;

[0022] 5. Put the beaker containing liquid nitrogen on the cup holder of the specific surface area measuring instrument, start the cup holder switch, and raise the beaker...

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Abstract

The invention relates to a method for detecting the specific area of iron oxide powder, which comprises the following steps: pouring 1.5g of deaerated iron oxide powder into an analyzer tube, and vacuumizing the analyzer tube; raising the beaker filled with liquid nitrogen until all the sample in the analyzer tube is submerged under the liquid level of the liquid nitrogen; and injecting helium gas into the analyzer tube to apply pressure, selecting five pressure points within the range of 150-780 mmHg, and analyzing each point for 8 minutes, wherein the average value of the five detection points is the final detection value of the specific area. By implementing the invention, the detection accuracy and precision completely meet the user requirements and standard requirements, thus the invention provides a new way and method for detecting the specific area of iron oxide powder. Therefore, the invention realizes step control on the iron oxide powder and selling according to quality, and can increase the selling price by over 50 yuan per ton.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy inspection, and in particular relates to a method for detecting the specific surface area of ​​iron oxide powder. Background technique [0002] Iron oxide powder is a by-product obtained after cold-rolling waste acid treatment. This black-red powdery substance has been widely used in the construction industry, industrial coatings, plastics, inks, magnetic materials and other fields. The specific surface area of ​​iron oxide powder refers to the surface area of ​​fine particles of a certain quality sample, generally in the range of 0.001-1000m 2 / g between. The specific surface area index of iron oxide powder will directly affect the stability, shading, fluidity, material strength and chemical properties of the substance. Since there is no suitable equipment and standard detection method for the detection of the specific surface area of ​​iron oxide powder, it has a lot of adverse effects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/10
Inventor 张国龙宋立伟赵宇董玲宛春枫
Owner ANGANG STEEL CO LTD
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