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Method for continuously determining zinc content and iron content of zinc concentrate

A determination method and technology of iron content, applied in the direction of measuring device, preparation of test samples, color/spectral characteristic measurement, etc., can solve the problems of large interference, high cost, long analysis time, etc., to ensure accuracy and easy operation , The effect of simplifying the experimental procedure

Inactive Publication Date: 2017-09-05
CHANGCHUN GOLD RES INST
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  • Application Information

AI Technical Summary

Problems solved by technology

To solve a series of problems such as long analysis time, high cost and large interference in the determination of zinc and iron

Method used

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  • Method for continuously determining zinc content and iron content of zinc concentrate
  • Method for continuously determining zinc content and iron content of zinc concentrate
  • Method for continuously determining zinc content and iron content of zinc concentrate

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0054] Determination of the standard sample BY0110-1 (the standard value of zinc content is 42.98%, the standard value of iron content is 4.13%):

[0055] 1) Weigh 0.20g (accurate to 0.0001g) sample into a 400mL beaker, add a small amount of water to moisten it, add 1g of ammonium fluoride, 15mL of concentrated hydrochloric acid, cover with a watch glass, heat and dissolve for 5min to drive away hydrogen sulfide;

[0056] 2) Take off the beaker, add 10mL concentrated nitric acid, continue to heat and dissolve for 5min, take off the beaker to cool, add 5mL sulfuric acid (diluted according to the volume ratio of 98% concentrated sulfuric acid and water 1:1), continue to heat to about 2mL, remove and cool ;

[0057] 3) Add 20mL of dilute sulfuric acid (diluted according to the volume ratio of 98% concentrated sulfuric acid to water: 1:9), heat to dissolve the salts, remove and rinse the watch glass and cup wall with water;

[0058] 4) Add 4-5g of ammonium chloride and 5mL of amm...

experiment example 2

[0085] Measure for standard sample GBW07168 (standard value of zinc content is 52.70%, standard value of iron content is 6.39%), assay method is identical with embodiment 1, and measurement result is as follows: zinc content is 52.46%, and iron content is 6.32%.

Embodiment 3

[0087] Unknown sample 1 is measured, and the measuring method is the same as that of Example 1, and the measuring results are as follows: the zinc content is 46.75%, and the iron content is 6.16%.

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Abstract

The invention belongs to the technical field of mineral content analysis, and discloses a method for continuously determining the zinc content and the iron content of zinc concentrate in order to solve the tediousness of two sample dissolving processes needed by individual determination. The method comprises the following steps: decomposing a sample by using hydrochloric acid, nitric acid, ammonium fluoride and sulfuric acid, adding ammonia water, separating the obtained precipitate, processing the obtained filtrate, determining zinc through using a Na2EDTA complexing titration technology, processing the obtained precipitate, and determining iron by using the Na2EDTA complexing titration technology. The method is very convenient to operate. Compared with existing other continuous titration methods, the method using the same standard EDTA solution in the invention has the advantages of simplification of the experiment program, reduction of the experiment cost, increase of the test speed of the sample, effective increase of the working efficiency, few experiment interference factors, and increase of the accuracy.

Description

technical field [0001] The invention belongs to the technical field of mineral content analysis, in particular to a continuous determination method for zinc and iron in zinc concentrate. Background technique [0002] Iron is one of the main components in zinc concentrate, and it is also an important component that affects the flotation index and the quality of zinc concentrate. Therefore, the determination of zinc and iron in zinc concentrate is necessary. There are many separate determination methods for zinc and iron, such as the national standard GB / T8151.1-2012 Determination of Zinc Content by Chemical Analysis Method of Zinc Concentrate, GB / T 8151.3-2012 Determination of Iron Content by Chemical Analysis Method of Zinc Concentrate, etc. However, it is a waste of time and cost to measure separately in actual production, and the sample dissolution methods of these two methods are very similar, so it is of great significance to invent a simple method that can simultaneousl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/31G01N1/38G01N1/44
CPCG01N1/38G01N1/44G01N21/3103G01N21/78G01N2021/786
Inventor 杨凤萍穆岩
Owner CHANGCHUN GOLD RES INST
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