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Method for determining sulfur content in iron ore by combustion iodometry

A combustion iodometric method and sulfur content technology, which is applied in the direction of chemical analysis by combustion, can solve the problems of influence of sulfur content measurement results, difficult flow rate control, unstable oxygen flow rate, etc., and achieve stable, accurate and reliable measurement results. , The effect of reducing energy consumption and stable airflow speed

Active Publication Date: 2015-06-17
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 Shown, combustion iodometric method of the present invention measures sulfur content method in iron ore, set forth by the following examples:

[0017] (1) First weigh 0.2000 grams of the 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 into 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, turn on the switch of the micro-air pump 3. In the present embodiment, the micro-air pump 3 selects the model of ACO-8500A produced by Guangdong Raoping Huanggang Xixin Mechanical Power Plant. The pump has a voltage of 6VDC, a power of 5W, an exhaust air volume of 6L / min, a pressure of 0.03MPa, a wei...

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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 invention relates to a technique for testing or analyzing materials by means of measuring their chemical or physical properties, in particular to a method for measuring sulfur content in iron ore by using an air pump with air as a carrier combustion iodometric method. Background technique [0002] There are roughly three forms of sulfur in iron ore samples: sulfur in sulfate, sulfur in sulfide and a small amount of elemental sulfur. When the sulfur content in the iron ore is less than or equal to 2%, the combustion iodometric method is applicable. [0003] Combustion iodometric determination of sulfur is the use of combustion method to decompose iron ore samples. The iron ore sample is placed in a porcelain boat, and then the porcelain boat is placed in a tube furnace heated to 1200-1300°C, and oxygen is introduced to convert all forms of sulfur in the iron ore sample into sulfur dioxide gas. Escape, absorb with water, make it generate sulfurous ...

Claims

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Application Information

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