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Method for determining sulfur content in iron ore by combustion iodometry

A technology of combustion iodometric method and sulfur content, which is applied in the direction of chemical analysis by means of combustion, etc. It can solve problems such as the influence of sulfur content measurement results, the flow rate is not easy to control, and the oxygen flow rate is unstable, so as to achieve stable, accurate and reliable measurement results , Reduce energy consumption, and stabilize the airflow speed

Active Publication Date: 2012-12-12
WUHU XINXING DUCTILE IRON PIPES
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Problems solved by technology

However, the flow rate of bottled oxygen is not easy to control, and the instability of oxygen flow rate will affect the measurement results of sulfur content in ore samples; secondly, the use of bottled oxygen is relatively close to the open flame of the tube furnace, which has potential safety hazards

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  • Method for determining sulfur content in iron ore by combustion iodometry

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Embodiment Construction

[0016] Combine figure 1 As shown, the method for determining the sulfur content in iron ore by the combustion iodometric method of the present invention is illustrated by the following examples:

[0017] (1) First, weigh 0.2000 grams of iron ore sample, place the iron ore sample in a porcelain boat, add an appropriate amount (about 1.0-1.5 grams) of copper oxide flux, and open the tube furnace 1 Rubber stopper, put the porcelain boat into the porcelain tube 2 of the tube furnace, push the porcelain boat to the high temperature part of the porcelain tube 2 with a long hook, and immediately plug the rubber stopper on the porcelain tube 2;

[0018] (2) After preheating the porcelain boat for 1.5-2 minutes, immediately turn on the switch of the micro air pump 3. In this embodiment, the micro air pump 3 uses the micro air model ACO-8500A produced by Guangdong Raoping Huanggang Xixin Power Plant The pump has a voltage of 6VDC, a power of 5W, an exhaust volume of 6L / min, a pressure of 0....

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Abstract

The invention relates to a method for determining the sulfur content in iron ore by a combustion iodometry and belongs to the material test or analysis technology. According to the method, an iron ore test sample is placed in a porcelain boat and is put into a 1200-1300 DEG C tubular furnace to be heated for 1.52 minutes, a miniature air pump is started, exhausted air is introduced into the tubular furnace for sufficient burning, the burnt mixed gas is introduced into starch absorption liquid, the blue color of the starch absorption liquid starts to fade away, then, potassium iodate standard solution is immediately used for dripping into the starch absorption liquid, the blue color is recovered, when the color fading of the starch absorption liquid is slow, the dripping speed of the otassium iodate standard solution is decelerated until the color of the starch absorption liquid is same as the original blue color and is not changed, the miniature air pump is closed, the porcelain boat is taken out, the milliliter number of the dripped otassium iodate standard solution is read, and the sulfur content is calculated according to a formula S percent=T(V-V0) / W*100percent. The method has the advantages that the determined result of the sulfur content of the ore test sample is accurate and stable, the measurement process is safe, and no potential safety hazard exists.

Description

Technical field [0001] The present invention relates to a technology for testing or analyzing materials by measuring their chemical or physical properties. Specifically, it relates to a method for measuring sulfur content in iron ore by using an air pump to burn iodine content with air as a carrier. Background technique [0002] Sulfur in iron ore samples generally exists in three forms: sulfur in sulfates, sulfur in sulfides and a small amount of elemental sulfur. When the sulfur content in iron ore is less than or equal to 2%, the combustion iodine method is applicable. [0003] The combustion iodometric method is used to determine sulfur by using a combustion method to decompose iron ore samples. That is, the iron ore sample is placed in a porcelain boat, and then the porcelain boat is placed in a tube furnace that has been heated to 1200-1300°C. Oxygen is introduced to convert all forms of sulfur in the iron ore sample into sulfur dioxide gas. Escape and absorb with wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/12
Inventor 丁连萍周颂红
Owner WUHU XINXING DUCTILE IRON PIPES
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