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Determination method for chloride ion content of temper rolling liquor for steel plate rolling

A technology of chloride ion content and determination method, which is applied in the field of determination of chloride ion content in solution, can solve problems such as unbearable for enterprises, and achieve the effects of reducing economic losses, accurate test results, and small errors

Inactive Publication Date: 2008-12-31
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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Problems solved by technology

This method has high accuracy, but in iron and steel enterprises, the determination of radioisotopes requires additional expensive testing equipment, which makes it difficult for enterprises to afford

Method used

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  • Determination method for chloride ion content of temper rolling liquor for steel plate rolling
  • Determination method for chloride ion content of temper rolling liquor for steel plate rolling
  • Determination method for chloride ion content of temper rolling liquor for steel plate rolling

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specific Embodiment

[0027] A method for measuring the content of chloride ions in a leveling solution for steel plate rolling, wherein the leveling solution mainly contains chloride ions, nitrite and some organic alcohols,

[0028] Weigh 10 g of the rolling leveling liquid sample, and the weighing accuracy is accurate to 0.0001 g. Put the sample in a 100ml porcelain crucible and dry it in an oven at 105°C to remove the moisture in the sample. Then move it to a muffler furnace at 800°C and burn it for 1 hour to remove organic matter and nitrite in the sample. Among them, organic alcohol is converted into carbon dioxide and water, and nitrite is decomposed into metal oxides, gaseous nitric oxide and oxygen. The sample is taken out and cooled and then transferred to a 100ml beaker, and the crucible is rinsed with double distilled water until the volume of the solution is 50ml, the beaker with the sample is placed in an ultrasonic oscillator, and the ultrasonic oscillation process is performed for 1...

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Abstract

The invention relates to a chloride ion measuring method of leveling liquid that is used in steel plate rolling, which is implemented according to following steps: firstly, a certain amount of the leveling liquid sample to be measured is placed into a porcelain crucible which is placed into a baking oven for drying; secondly, the dried sample is placed into a retort furnace so as to be cauterized, and then taken out and cooled; thirdly, the sample that is processed by the second step and the crucible are rinsed by secondary distilled water, rinsed liquid is added into a sample solution until a certain volume value is reached, and ultrasonic oscillation is used for dissolving the chloride ions of the sample in the water; fourthly, a certain amount of the solution that is processed by the oscillation and contains the chloride ions is filtered by a filter paper, a filtered solution is collected, the chloride ion content in the filtered solution is measured by the Mohr volumetric method, and simultaneously a same amount of the secondary distilled water is used for blank titration, and the final chloride ion content in the leveling liquid can be obtained by computation. The chloride ion measuring method of the invention has the advantaged of simplicity and low test cost.

Description

technical field [0001] The invention relates to a method for measuring the content of chloride ions in a solution, in particular to a method for measuring chloride ions in a leveling solution used in steel plate rolling. Background technique [0002] The leveling liquid is a process medium that must be used in the steel plate rolling process. Due to its direct contact with the steel plate, its quality directly affects the surface quality of the steel plate. In particular, the content of inorganic chloride ions should be controlled as low as possible. Generally, the control value of inorganic chloride ions in leveling liquid products is less than 180 μg / g. However, since the leveling fluid is compounded from a variety of chemical raw materials, as long as any one of the raw materials is mixed with chloride ions, the quality of the leveling fluid product will be affected. However, there is no specific method for the accurate determination of chloride ions in leveling liquid p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/79G01N1/28G06F19/00
Inventor 蒋文捷刘韵秋
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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