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Analysis method for gold content of gold-containing ore sample

An analysis method and technology for gold content, applied in the field of analysis of gold content of gold-bearing ore samples, can solve the problems of scattered distribution, inaccurate detection results, and low gold content of gold-bearing ore samples, so as to reduce data fluctuation and expand sampling range. Effect

Pending Publication Date: 2021-10-26
江西省地质调查研究院
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  • Abstract
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Problems solved by technology

[0007] The purpose of the present invention is to address the above-mentioned defects and deficiencies, solve the technical problems in the prior art that the gold content of gold-containing ore samples is extremely low and scattered, and the ore samples cannot truly represent the gold content of the ore, resulting in inaccurate detection results. Analytical method of gold content in gold ore samples

Method used

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  • Analysis method for gold content of gold-containing ore sample
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  • Analysis method for gold content of gold-containing ore sample

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Effect test

Embodiment 1

[0031] In a sulfide-poor gold ore, except for the precious metal natural gold, the content of other metal minerals is extremely low. The analysis sample was prepared by conventional methods, and the gold content was tested for 15 times. The gold content was between 24.09-29.92g / t Between them, the average was 27.04g / t, with a deviation of -10.91% to 16.50%. Adopt the method of the present invention, 1-7kg arbitrary weight sample grinds ore respectively to account for 80% to -0.074mm, after the sorting of Nielsen separator, gravity separation concentrate and gravity separation tailings are according to formula α=(G 1 *β 1 +(G-G 1 )*β 2 ) / G, 8 tests show that the gold content is between 25.68-30.87g / t, the average grade is 28.28g / t, and the deviation is -9.19% to 6.22%. The gold-bearing ore samples should be used to analyze the samples The preparation method reduces the deviation of the gold analysis results of the gold-bearing ore.

Embodiment 2

[0033] In a certain polysulfide gold ore, in addition to the precious metal natural gold, the ore has a high sulfur content. The analysis sample was prepared by a conventional method. After repeated 13 times to detect the gold content, the gold content was between 1.22-2.1g / t. The average was 1.72g / t with a variance of -29.20% to 21.88%. Adopt the method of the present invention, 1-7kg random weight sample grinds ore respectively to account for 50% to -0.074mm, after being sorted by Nielsen separator, gravity separation concentrate and gravity separation tailings are according to formula α=(G 1 *β 1 +(G-G 1 )*β 2 ) / G, 12 tests show that the gold content is between 1.6-1.98g / t, the average grade is 1.78g / t, and the deviation is -10.28% to 12.15%. The gold-bearing ore sample should be used to analyze the sample With the preparation method, the deviation of the gold analysis result of the gold-bearing ore is obviously reduced.

Embodiment 3

[0035] In a gold-bearing polymetallic ore, in addition to the precious metal silver-gold ore and natural gold, the metal minerals pyrite, galena and sphalerite are relatively high. The analytical sample was prepared by the conventional method, and the gold content was tested 21 times. The gold content was between 5.74-9.48g / t, with an average value of 7.43g / t and a deviation of -22.76% to 37.26%. Adopt the method of the present invention, 1-7kg arbitrary weight sample grinds ore respectively to -0.074mm and accounts for 75%, after sorting through Nelson separator, gravity separation concentrate and gravity separation tailings are according to formula α=(G 1 *β 1 +(G-G1 )*β 2 ) / G, 13 tests show that the gold content is between 6.99-10g / t, the average grade is 8.59g / t, and the deviation is -18.60% to 16.45%. With the preparation method, the deviation of the gold analysis result of the gold-bearing ore is obviously reduced.

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Abstract

The invention discloses an analysis method for the gold content of a gold-bearing ore sample, which comprises the following steps of: crushing and weighing the gold-bearing ore sample to be detected, sorting out reselected concentrate and reselected tailings through reselection equipment, analyzing the gold content of the reselected concentrate and the reselected tailings through a gold content detection method respectively, and determining the gold content of the gold-bearing ore sample after the results of the reselected concentrate and the reselected tailings are processed. The gold content of the reselected concentrate is detected by the fire assaying method according to the weight suitable for fire assaying method detection. According to the invention, a division process step is avoided, and the sampling range of the gold-containing ore sample to be detected is expanded, so that the detection result is accurate and real. Since the gold ore is different from other ores, the gold content is relatively low and the gold is scattered in the ores, a representative detection result is difficult to obtain if an existing detection method is adopted. The positive deviation and the negative deviation of the detection result of the conventional method represented by the embodiment of the invention are respectively 16-38% and 9-18%, and compared with the existing detection method, the method disclosed by the invention can reduce 75% of data fluctuation to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of ore content analysis, in particular to an analysis method for gold content of a gold-bearing ore sample. Background technique [0002] The content of gold in nature is extremely low, which makes it difficult to guarantee the representativeness and uniformity of gold-bearing ore samples during the preparation process. This characteristic of gold-bearing ores makes the reproducibility of the analysis results of the current detection methods poor. Ultimately, it is impossible to accurately determine the gold grade of gold-bearing ore samples, and it is difficult to guide gold mine exploration or comprehensive evaluation of gold-bearing mines in a timely manner. [0003] The preparation of analytical samples during the test of gold-bearing ore samples is based on the "Quality Management Standards for Geological and Mineral Resources Laboratory Testing" (DZ / T 0130.2-2006), which was first published and implem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/2028
CPCG01N33/2028
Inventor 陈军刘亮丁力潘峰岗黄六老周渝王学田董菁黄军
Owner 江西省地质调查研究院
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