Method for determining ammonium vanadate moisture

An ammonium vanadate and moisture technology, applied in the field of measuring the moisture of ammonium vanadate, can solve the problems of inability to immediately guide drying production, inaccurate results of measuring moisture, long drying and dehydration time, etc., and achieves short measuring time, short heating time, The effect of low heating temperature

Inactive Publication Date: 2010-10-13
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1, the drying time is long, and the drying production cannot be guided immediately; 2, the result of measuring moisture is inaccurate
Because the drying time is too long, it can only be considered by experience that the ammonium vanadate has been completely dehydrated, and basically the weight of the ammonium vanadate after drying does not change in operation. Therefore, when the water content of ammonium vanadate changes, it is very It is easy to produce errors, and to accurately measure the water content, it is necessary to repeatedly dry and dehydrate ammonium vanadate. The required drying and dehydration time is very long, which is rarely done in actual detection and analysis operations; 3. The drying temperature is too high
Because too long drying time is required, in order to improve the drying efficiency, the drying temperature is often increased, and if the temperature is high, the ammonium vanadate may be decomposed, making the measurement results inaccurate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 200g of ammonium polyvanadate and place it evenly on the tray of a box-type microwave oven. The thickness of the ammonium polyvanadate layer is about 10mm. Set the microwave heating temperature to 100°C and the heating time to 10min. Start the microwave oven to heat the ammonium polyvanadate. Dehydration, after the set time, the microwave oven stops heating, takes out the tray, weighs the ammonium polyvanadate, and the ammonium polyvanadate weight is 121.25g;

[0020] Put the ammonium polyvanadate back into the box-type microwave oven, set the heating temperature of the microwave oven to 90°C, and set the heating time to 8 minutes. Start the microwave oven to heat and dehydrate the ammonium polyvanadate. After the set time, the microwave oven stops heating, and the material is taken out. Pan, weighs ammonium polyvanadate, obtains ammonium polyvanadate weight and is 116.12g;

[0021] Put the ammonium polyvanadate back into the box-type microwave oven, set the heati...

Embodiment 2

[0024] Weigh 150g of ammonium polyvanadate and place it evenly on the tray of a box-type microwave oven. The thickness of the ammonium polyvanadate material layer is about 8.5mm. Heating and dehydration, after the set time, the microwave oven stops heating, takes out the tray, weighs the ammonium polyvanadate, and obtains a weight of 108.96g of ammonium polyvanadate;

[0025] Put the ammonium polyvanadate back into the box-type microwave oven, set the heating temperature of the microwave oven to 80°C, and set the heating time to 7 minutes. Start the microwave oven to heat and dehydrate the ammonium polyvanadate. After the set time, the microwave oven stops heating, and the material is taken out. Pan, weighs ammonium polyvanadate, obtains ammonium polyvanadate weight and is 108.96g;

[0026] Ammonium polyvanadate weight no longer changes, so the water content of this ammonium polyvanadate sample is 150-108.96=41.04g, and this ammonium polyvanadate water percentage composition i...

Embodiment 3

[0028] Weigh 100g of ammonium polyvanadate and place it evenly on the tray of a box-type microwave oven. The thickness of the material layer is about 8.0mm. After setting the time, the microwave oven stopped heating, took out the tray, weighed the ammonium polyvanadate, and obtained the ammonium polyvanadate weight as 82.37g;

[0029] Put the ammonium polyvanadate back into the box-type microwave oven, set the heating temperature of the microwave oven to 70°C, and set the heating time to 5 minutes. Start the microwave oven to heat and dehydrate the ammonium polyvanadate. After the set time, the microwave oven stops heating and takes out the material. Pan, weighs ammonium polyvanadate, obtains ammonium polyvanadate weight and is 82.37g;

[0030] Ammonium polyvanadate weight no longer changes, so the water content of this ammonium polyvanadate sample is 100-82.37=17.63g, and this ammonium polyvanadate water percentage is (17.63 / 100)*100%=17.63% .

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Abstract

The invention relates to a method for detecting ammonium vanadate, belonging to inorganic chemical field. Technical problem solved is to provide a method for detecting ammonium vanadate quickly and accurately. The method for detecting ammonium vanadate comprise steps of: a, placing the test ammonium vanadate with weight A in micro oven, processing first heating to hydrate for the ammonium vanadate; b, recording weight of the ammonium vanadate after first heating to hydrate as A<1>; c, processing second heating to hydrate for the ammonium vanadate; d, recording weight of the ammonium vanadate after second heating to hydrate as A<2>; e, if A<2> =A<1>, water containing percentage content q of the ammonium vanadate = ((A-A<2> / A)*100%; if A<2><A<1>, repeating steps c, d until weight of the ammonium vanadate after hydration is equal to that of previous hydration. The method of the invention can be applied to measuring water of the ammonium vanadate, which has wide application foreground.

Description

technical field [0001] The invention relates to a method for measuring the water content of ammonium vanadate, which belongs to the field of inorganic chemistry. Background technique [0002] At present, vanadium metallurgical production is first to extract ammonium vanadate (including ammonium metavanadate and ammonium polyvanadate) by water method from vanadium-containing raw materials, and then use ammonium vanadate as raw material to produce subsequent vanadium products such as vanadium oxide and vanadium nitride and vanadium alloys. And the production of follow-up product has strict requirement to the moisture of ammonium vanadate raw material, and generally, the lower water content is better, and in the production process of ammonium vanadate, owing to technical reasons such as vanadium extracting process, can contain a large amount of moisture (up to 60 % or more), therefore, it is necessary to dry the hydrated ammonium vanadate, and detect the water content of the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04G01N1/44
Inventor 张帆孙朝晖刘武汉王小江王英杨雄
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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