{"id":1366,"date":"2026-06-26T17:44:21","date_gmt":"2026-06-26T12:44:21","guid":{"rendered":"https:\/\/alfa-lab.net\/?p=1366"},"modified":"2026-07-10T18:15:05","modified_gmt":"2026-07-10T13:15:05","slug":"column_test","status":"publish","type":"post","link":"https:\/\/alfa-lab.net\/en\/column_test\/","title":{"rendered":"Column test"},"content":{"rendered":"
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TECHNOLOGICAL TESTS<\/h4>\t\t\t\t<\/div>\n\t\t\t\t
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Column test<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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The column test makes it possible to assess the recoverability of metals, reagent consumption, and ore leaching behavior under conditions close to production.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Industrial model<\/h3>

The method creates conditions that are as close as possible to the leaching process in production.<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t

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Samples from 50 kg<\/h3>

Large ore samples loaded into laboratory columns are used for testing.<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t

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Solution control<\/h3>

The productive solution is selected and analyzed daily for key technological indicators.<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t

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Evaluation of extraction<\/h3>

The results allow us to clarify the degree of metal recovery and the need for reagents.<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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About the method<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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The column test is a technological test of ores for leaching by seepage. The method allows you to create laboratory conditions that are as close as possible to the industrial process, and to obtain data for assessing the recoverability of metals and the need for reagents.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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For preliminary tests, samples weighing from 50 kg are used. The ore mixture with a known mass is loaded into the leaching column, after which a low-intensity leaching solution is fed from above. The solution seeps through the ore mass and is collected in a separate container.<\/p>

Each portion of the production solution is monitored by volume and analyzed for precious metal content, pH level, and cyanide concentration. Such measurements allow you to track the dynamics of the process and evaluate the change in leaching indicators over time.<\/p>

The procedure continues until the metal content in the production solution stabilizes at low concentrations or further leaching ceases to make practical sense. After the tests are completed, the ore is washed, extracted from the column, dried and sent for analysis of the residual content of precious metals.<\/p>

If necessary, the material is further dispersed into fractions to determine the distribution of the desired elements. The final recovery rate is calculated based on data on the starting material, accumulated productive solutions, and spent ore.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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What tasks are used for<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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