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Method for detecting content of barium carbonate in witherite

A detection method, witherite technology, applied in the field of chemical detection, can solve the problems of high analysis results, separation of barium sulfate and silicate, etc., and achieve the effect of large detection range, simple and easy-to-learn detection method, and good stability

Inactive Publication Date: 2019-08-06
玉溪新兴钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because witherite contains a small amount of impurities such as calcium carbonate, silicate and barium sulfate, this method cannot separate barium sulfate and silicate, and calcium ions will react with sulfuric acid to form calcium sulfate precipitates, and the two impurities will lead to analysis results high

Method used

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  • Method for detecting content of barium carbonate in witherite
  • Method for detecting content of barium carbonate in witherite
  • Method for detecting content of barium carbonate in witherite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Determination of barium carbonate content in witherite 1# sample

[0038] A. Sample preparation: crush and grind witherite 1# to a particle size of ≤0.125mm, and dry in an oven at a constant temperature of 135°C±5°C for 1.5h;

[0039] B. Prepare the following reagents and solutions: 1+1 hydrochloric acid solution, potassium dichromate solution with a concentration of 20g / L, acetic acid-ammonium acetate buffer solution with pH=4~5, 0.1% methyl red indicator, concentration 100g / L L sodium hydroxide solution, silver nitrate solution with a concentration of 17g / L; the reagents and water used, unless otherwise specified, refer to analytical reagents and third-grade water not lower than those specified in GB / 6682; test The reagents and solutions used in the test are all prepared according to the provisions of GB / T603-2002 "Preparation of Preparations and Products Used in Chemical Reagent Test Methods";

[0040] C. Determination:

[0041] 1) Sample dissolution: Weigh 0.5001g...

Embodiment 2

[0054] Determination of barium carbonate content in witherite 2# sample

[0055] A. Sample preparation: crush and grind witherite 2# to a particle size of ≤0.125mm, and dry in an oven at a constant temperature of 135°C±5°C for 1.8h;

[0056] B. Prepare the following reagents and solutions: 1+1 hydrochloric acid solution, potassium dichromate solution with a concentration of 20g / L, acetic acid-ammonium acetate buffer solution with pH=4~5, 0.1% methyl red indicator, concentration 100g / L L sodium hydroxide solution, silver nitrate solution with a concentration of 17g / L; the reagents and water used, unless otherwise specified, refer to analytical reagents and third-grade water not lower than those specified in GB / 6682; test The reagents and solutions used in the test are all prepared according to the provisions of GB / T603-2002 "Preparation of Preparations and Products Used in Chemical Reagent Test Methods";

[0057] C. Determination:

[0058] 1) Sample dissolution: Weigh 0.5000g...

Embodiment 3

[0071] Determination of barium carbonate content in witherite 3# sample

[0072] A. Sample preparation: crush and grind witherite 3# to a particle size of ≤0.125mm, and dry in an oven at a constant temperature of 135°C±5°C for 2 hours;

[0073] B. Prepare the following reagents and solutions: 1+1 hydrochloric acid solution, potassium dichromate solution with a concentration of 20g / L, acetic acid-ammonium acetate buffer solution with pH=4~5, 0.1% methyl red indicator, concentration 100g / L L sodium hydroxide solution, silver nitrate solution with a concentration of 17g / L; the reagents and water used, unless otherwise specified, refer to analytical reagents and third-grade water not lower than those specified in GB / 6682; test The reagents and solutions used in the test are all prepared according to the provisions of GB / T603-2002 "Preparation of Preparations and Products Used in Chemical Reagent Test Methods";

[0074] C. Determination:

[0075] 1) Sample dissolution: Weigh 0.50...

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Abstract

The invention discloses a method for detecting the content of barium carbonate in witherite. The method comprises steps of sample preparation, reagent and solution preparation, barium sulfate sedimentremoving, barium chromate sediment generation, barium chromate sediment filtering and drying, and analysis result calculation and the like. The detecting method has a large detection range; influences on the detection result by impurities like barium sulfate, silicate and calcium carbonate can be eliminated effectively; the detection result has high stability, reproducibility and accuracy; and the detecting method is simple and is easy to learn and no high requirement on the analysis staff is needed. The method has the broad application prospects and has the important significance in evaluating the witherite quality grade and omprehensive application.

Description

technical field [0001] The invention belongs to the technical field of chemical detection, and in particular relates to a detection method for barium carbonate content in witherite. Background technique [0002] Witherite is another barium-containing mineral resource in nature except barite, and its main component is BaCO 3 , and contains a small amount of impurities such as calcium carbonate, silicate and barium sulfate, and is widely used in iron and steel metallurgy, glass, pigments, enamel, paint, rubber, coatings, welding rods, pyrotechnics, electronics and other industries and the manufacture of barium salts. of which BaCO 3 As an active ingredient in witherite, its quantitative analysis is of great significance for evaluating the quality grade and comprehensive application of witherite. Therefore, it is particularly important to establish an analysis method for BaCO3 content in witherite. [0003] Currently, BaCO in witherite 3 There is no corresponding national s...

Claims

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Application Information

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IPC IPC(8): G01N5/00G01N21/82
CPCG01N5/00G01N21/82
Inventor 严海吴光耀邹荣曹重何飞宏周攻敏段家华赵卫东钱海涛
Owner 玉溪新兴钢铁有限公司
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