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Digestion method of metallurgical materials and detection method

A material and alkali metal technology, applied in the field of digestion and detection of metallurgical materials, can solve problems such as vessel corrosion, achieve the effects of reduced dosage, wide application fields, and simple requirements for experimental equipment

Active Publication Date: 2012-07-11
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, there may be elemental metals such as iron, nickel, and aluminum in the sample, which can easily lead to alloying reactions with precious vessels such as platinum crucibles at high temperatures, causing serious corrosion to the vessels

Method used

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  • Digestion method of metallurgical materials and detection method
  • Digestion method of metallurgical materials and detection method
  • Digestion method of metallurgical materials and detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Digestion of titanium ore samples

[0041] Weigh 0.1 titanite sample (hereinafter referred to as No. 1 sample) and place it in a container, add 20 mL of hydrochloric acid solution for heating and digestion until the reaction is basically completed, and after the solution emits uniform large bubbles, filter it with slow filter paper while it is hot, and use 20 mL of 80 ℃ hot water, rinse the container and wash the residue several times a small amount, and collect the filtrate in a 200mL volumetric flask. Place the washed residue in a platinum crucible, heat it to 450°C in a muffle furnace to fully ash the residue, then take it out and cool it to room temperature; then add 0.1g of lithium tetraborate, and stir and mix well with the residue, re- Put it into a muffle furnace and melt it at 950°C for 20 minutes; after cooling, add 7mL of concentrated hydrochloric acid to boil for leaching, then combine with the above-mentioned collected filtrate and dilute to the original ...

Embodiment 2

[0045] The metallurgical material sample containing refractory oxides to be digested according to Example 2 is a titanium slag sample. Take 0.3g sample (hereinafter referred to as sample No. 2) and digest it with 15mL of nitric acid, wash the residue with 15mL of 100°C hot water, collect the filtrate in a 100mL volumetric flask; incinerate the residue at 600°C, add 0.3g of sodium peroxide, and Melt at 800°C for 15 minutes, boil and extract with 8 mL of concentrated nitric acid, combine with the filtrate collected above, and dilute to volume with water. In addition, the titanium slag samples were digested and detected in the same manner as in Example 1.

Embodiment 3

[0047] The metallurgical material sample containing refractory oxides to be digested according to Example 3 is a ferro-titanium sample. Take 1.0g sample (hereinafter referred to as sample No. 3) and digest it with 15mL hydrochloric acid, wash the residue with 15mL hot water at 60°C, collect the filtrate in a 100mL volumetric flask; incinerate the residue at 250°C, add 0.5g lithium tetraborate, and Melt at 700°C for 25 minutes, boil and extract with 10mL of concentrated hydrochloric acid, combine with the filtrate collected above, and dilute to volume with water. In addition, the ferro-titanium sample was digested and detected according to the same method as that of Example 1.

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Abstract

The invention discloses a digestion method of metallurgical materials. The digestion method comprises the steps of: putting the metallurgical materials into a container, adding hydrochloric acid or nitric acid into the container, reacting under the heating condition, filtering a reaction solution after reaction is finished, collecting filtrate and cleaning residues; putting the cleaned residues in a platinum crucible, and heating to 250-600 DEG C for ashing treatment; after complete ashing of the residues, cooling to room temperature, then adding an alkali metal salt solvent, stirring uniformly, heating the mixture stirred uniformly to be 700-1050 DEG C, melting for 10-30 min, cooling, then adding 5-10ml concentrated hydrochloric acid or concentrated nitric acid, boiling, leaching, and obtaining a solution for melting the residues; and combining the filtrate with the solution for melting the residues and obtaining a digested solution. The digestion method is wide in application field, is simple in requirements on experiment instruments, and can be effectively applied in a laboratory equipped with various instruments.

Description

technical field [0001] The invention relates to a sample digestion method and a detection method, more specifically, the invention relates to a metallurgical material digestion method and a detection method. Background technique [0002] In order to realize the comprehensive utilization of vanadium-titanium ore, iron ore and other resources and improve the quality of products, and to control the pollution caused by the introduction of impurity elements in the production processes such as smelting, vanadium extraction, and titanium extraction, it is necessary to accurately detect metallurgical materials. The content of each impurity element. [0003] Existing sample analysis techniques, except for dry methods such as emission spectroscopic analysis, usually first digest the sample to make a solution before performing the measurement. Sample digestion is the first analysis step after sample crushing. The purpose of sample digestion is to convert solid samples into analytical ...

Claims

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Application Information

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IPC IPC(8): G01N1/38G01N1/44
Inventor 成勇胡金荣袁金红肖军彭慧仙
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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