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Novel method for detecting arsenic content in ore

A detection method and content technology, applied in the field of detection of arsenic content in ores, can solve the problems of affecting the measurement results, too many reagents, time-consuming, etc., and achieve the effects of improving the efficiency of laboratory analysis, reducing analysis costs, and accurate detection results

Inactive Publication Date: 2019-11-29
YUNNAN HUALIAN ZINC & INDIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Potassium bromate titration and sodium hypophosphite volumetric method have a long operation process in the determination process, and factors such as difficult control of electric furnace temperature and unclean washing affect the accuracy of the determination results; arsenic antimony molybdenum blue photometric method requires more reagents , easy to be polluted, the absorption time is long, and the incomplete absorption will affect the measurement results. The highly toxic arsenic trioxide is used in the determination process of these two analysis methods
Take a mining company in the south as an example: the amount of arsenic samples that need to be analyzed in geology, mining, and mineral processing processes is about 30,000 per year. Using traditional methods to analyze arsenic elements is cumbersome, time-consuming, and labor-intensive. The annual analysis of arsenic elements requires The cost is about 1.2 million yuan, resulting in a great waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: the detection method of arsenic content in a kind of new ore, comprises the following steps:

[0021] Step A: Melting the arsenic-containing ore

[0022] First crush the arsenic-containing ore and pass it through a 200-mesh sieve. Take 0.8g of sodium peroxide and spread a layer on the bottom of the corundum crucible as a base. Accurately weigh 0.2g of the arsenic-containing ore and place it on top of the sodium peroxide, then weigh 0.7 g sodium peroxide spread a layer to cover;

[0023] Then heat the corundum crucible at 700°C for 10-15 minutes to melt the mixture of ore and sodium peroxide;

[0024] Step B: Dissolving

[0025] Add 40mL of water to the molten mixture, and add 15mL of analytically pure hydrochloric acid to dissolve it;

[0026] Step C: using an inductively coupled plasma emission spectrometer to detect the arsenic content in the solution;

[0027] Step C specifically includes: establishing a standard working curve, and configuring stand...

Embodiment 2

[0032] Embodiment 2: the detection method of arsenic content in a kind of new ore, comprises the following steps:

[0033] Step A: Melting the arsenic-containing ore

[0034] First crush the arsenic-containing ore and pass through a 200-mesh sieve. Take 0.5g of sodium peroxide and spread a layer on the bottom of the corundum crucible as a base. Take 0.20g of mixed powder and spread a layer to cover it. Then take 0.9g of sodium peroxide and spread a layer. layer cover;

[0035] Then heat the corundum crucible at 700°C for 14 minutes to melt the mixture of ore and sodium peroxide;

[0036] Step B: Dissolving

[0037] Add 40mL of water to the molten mixture, and add 10mL of analytically pure hydrochloric acid to dissolve it;

[0038] Step C: using an inductively coupled plasma emission spectrometer to detect the arsenic content in the solution.

[0039] The same batch of ore was used to carry out the above measurement 10 times in parallel. In this embodiment, the average arse...

Embodiment 3

[0042] Embodiment 3: the detection method of arsenic content in a kind of new ore, comprises the following steps:

[0043] Step A: Melting the arsenic-containing ore

[0044] First crush the arsenic-containing ore and pass it through a 200-mesh sieve. Take 0.6g of sodium peroxide and spread a layer on the bottom of the corundum crucible as a base. Take 0.2g of the arsenic-containing ore powder under the sieve and put it on the sodium peroxide, and then weigh 1.0g of the over- Cover with a layer of sodium oxide;

[0045] Then heat the corundum crucible at 700°C for 10 minutes to melt the mixture of ore and sodium peroxide;

[0046] Step B: Dissolving

[0047] Add 40mL of water to the molten mixture, and add 13mL of analytically pure hydrochloric acid to dissolve it;

[0048] Step C: using an inductively coupled plasma emission spectrometer to detect the arsenic content in the solution;

[0049] The same batch of ore was used to carry out the above measurement 10 times in pa...

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Abstract

A novel method for detecting arsenic content in ore relates to the field of ore detection. The method comprises the following steps: A, melting arsenic-containing ore; B, dissolving; and C, detection.The element determining speed is high, a detection result is accurate, operation is simple, the labor intensity of laboratory technicians is greatly reduced, and the test analysis efficiency is improved.

Description

technical field [0001] The invention relates to the field of ore detection, in particular to a new detection method for arsenic content in ore. Background technique [0002] In the field of ore analysis and detection, the content of arsenic element is almost one of the elements that must be detected. The determination of arsenic in ore: from sodium hypophosphite volumetric method, arsenic antimony molybdenum blue photometric method to potassium bromate titration method. Potassium bromate titration and sodium hypophosphite volumetric method have a long operation process in the determination process, and factors such as difficult control of electric furnace temperature and unclean washing affect the accuracy of the determination results; arsenic antimony molybdenum blue photometric method requires more reagents , easy to be polluted, the absorption time is long, and the incomplete absorption will affect the measurement results. The highly toxic arsenic trioxide is used in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/44G01N27/64
CPCG01N1/44G01N27/64
Inventor 白家源李纯浪杨绍辉颜忠国杨再云
Owner YUNNAN HUALIAN ZINC & INDIUM