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Method for determining element content in ferroalloy and pretreatment method for its sample

A technology of sample pretreatment and element content, which is applied in the preparation of test samples, measuring devices, instruments, etc., can solve the problems of complex melting operation, high cost of chemical reagents, protracted process, etc., so as to achieve easy mastery and operation , less consumption of pharmaceutical reagents, less reaction conditions and less demanding effects

Active Publication Date: 2018-06-12
PANGANG GROUP RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powder pressing method of XRF cannot meet the requirements of accurate and quantitative determination of the content of ferroalloy elements, and the method of preparing glass flakes by melting must be pretreated by fire or wet method to convert ferroalloys into oxides or solid salts, and then melt and digest at high temperature , the sample preparation operation is complicated, the steps are increased, the process is prolonged, the error is increased, and the melting operation is complicated and demanding, the cost of the chemical reagents used is high and there are many types, the sample must be melted and digested and effectively demoulded and crystallized to form a glass with a smooth surface and no cracks crystal

Method used

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  • Method for determining element content in ferroalloy and pretreatment method for its sample
  • Method for determining element content in ferroalloy and pretreatment method for its sample
  • Method for determining element content in ferroalloy and pretreatment method for its sample

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Embodiment 1 adopts the inventive method to measure the content of each element in ferrovanadium ferroalloy

[0042] Alkaline mixed flux is formulated according to anhydrous sodium carbonate: anhydrous boric acid=1:1 composition ratio, namely weighing 500g anhydrous sodium carbonate and 500g boric acid are mixed together and crushed, ground and mixed, and the amount of flux is sample quality 10 times. Weigh 5.0g of alkaline mixed flux and 0.5g of the ferrovanadium sample to be tested and mix them evenly in filter paper, wrap and fold the filter paper and place them in a graphite-bottomed crucible, and melt and react in a muffle furnace at 900°C for 25 minutes.

[0043] The melted and digested ferrovanadium sample was cooled to remove the attached graphite powder, crushed, ground, mixed and sieved with a 0.125mm sieve with a tungsten carbide mortar, and the molten sample was reprocessed to prepare a powder state. The basic mixed flux prepared by the above-mentioned anhy...

Embodiment 2

[0045] Embodiment 2 adopts the inventive method to measure the content of each element in ferro-niobium ferroalloy

[0046] Except for the following differences, all the others adopt the same method as in Example 1 to carry out the preparation of powder tablets and the determination of elemental components in Example 2: the detection object of Example 2 is a niobium-iron alloy sample; Anhydrous sodium carbonate: anhydrous boric acid=2:1 composition ratio preparation, promptly weigh 1000g anhydrous sodium carbonate and 500g boric acid and mix together and crush, grind and mix, and flux consumption is 20 times of sample quality; Take 20.0g of mixed flux and 1.0g of ferroniobium sample to be tested, and melt at 1000°C for 20min. The powder compression condition is 10s under the pressure of 18 tons. The results of the content of each element in the alloy are shown in Table 4.

Embodiment 3

[0047] Embodiment 3 adopts the inventive method to measure the content of each element in ferrosilicon class ferroalloy

[0048] Except for the following differences, all the others adopt the same method as in Example 1 to carry out the powder tablet preparation and element composition determination of Example 3: the detection object of Example 3 is a ferrosilicon-like ferroalloy sample; Anhydrous sodium carbonate: anhydrous boric acid = 1:1 composition ratio, the amount of flux is 15 times the mass of the sample; weigh 15.0g of the mixed flux and 1.0g of the ferroniobium sample to be tested, and melt at 950°C for 22min. The powder compression condition is 8s under the pressure of 16 tons. The results of the content of each element in the alloy are shown in Table 3.

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Abstract

The invention relates to a method for measuring element content in iron alloy and a sample pretreatment method thereof, belonging to the field of element detection and analysis. The first technical problem to be solved by the present invention is to provide a sample pretreatment method for determining element content in ferroalloy. The sample pretreatment method for determining element content in ferroalloy of the present invention comprises the following steps: a. Melting reaction: melting the ferroalloy sample with an alkaline mixed flux to obtain molten balls or frits; wherein, the alkaline mixed flux is made of Composed of anhydrous sodium carbonate and anhydrous boric acid; b. Grinding: crush, grind and sieve the molten ball or frit obtained in step a to obtain powder; c. Tablet pressing: use alkaline mixed flux as a substrate, and grind b The powder obtained in the step is pressed into a sheet to obtain a pretreated sample of the ferroalloy sample. The method of the invention has the characteristics of simplicity, quickness, easy operation, less substrate interference factors, high quantitative measurement accuracy and precision, and the like.

Description

technical field [0001] The invention relates to a method for measuring element content in iron alloy and a sample pretreatment method thereof, belonging to the field of element detection and analysis. Background technique [0002] Ferroalloy is an intermediate alloy composed of iron element and one or more other elements. It is mainly used to remove oxygen, sulfur, nitrogen, etc. from molten steel during iron and steel smelting, or to add alloy elements to the steel according to the requirements of the steel composition. To improve the structural properties of steel, and to add to molten iron before cast iron casting to improve the crystal structure of castings, or as a basic raw material for titanium alloys. There are many kinds of ferroalloy products, commonly used ones include ferro-vanadium, ferro-niobium, ferrosilicon, silicomanganese, ferro-manganese, ferro-molybdenum, and ferro-titanium. The production and manufacture of ferroalloy products and its application in met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N23/223
Inventor 成勇
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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