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Tandem column soak test device

A test device and column leaching technology, applied in the field of serial column leaching test devices

Active Publication Date: 2012-07-11
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And these are the defective places of existing column immersion test device

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach

[0035] The patent of the present invention provides a series column leaching test device for simulating on-site ore heap leaching. image 3 After the installation of the device is completed, liquid distribution is carried out every day according to the parameters of the concentration of the immersion solution, oxidant concentration, liquid distribution strength, liquid-solid ratio, and liquid distribution time set by the test. At the same time, the leaching rate of useful metals, The consumption of leaching agent and oxidant, as well as parameters such as pH and Eh can be detected to determine the time-varying law of parameters such as useful metal ion concentration, pH, Eh, residual acidity, and oxidant concentration at different depths during the on-site ore heap leaching process.

[0036] If you need to understand the leaching rate of useful metals at various depths of the ore heap, the consumption of leaching agents and oxidants, and the changes in parameters such as pH and...

Embodiment 1

[0042] The prepared uranium ore samples with a particle size of 1-2mm and a uranium grade of 0.177% were evenly packed into four unit columns with an inner diameter of 88mm. The height of the uranium ore columns was 250mm, and a layer of granular Quartz sand with a diameter of 1-2mm and a thickness of 30mm. Then place four unit columns on a layered bench to form a serial column immersion test device. The liquid-solid ratio of 0.1L / kg is used for distributing liquid every day. The concentration of sulfuric acid in the immersion liquid is 5-20g / L, and the initial sulfuric acid concentration is 20g / L. Then adjust the concentration of sulfuric acid according to the change of pH value to make the later pH Keep it between 1-2. The liquid distribution time is 8 hours per day, and the liquid distribution strength is 20.55L / h m 2 , The leaching time is 35d. The sampling time of each unit column is 4-4.5 hours after the liquid spraying every day. The total leachate was sampled befor...

Embodiment 2

[0044] The prepared uranium ore sample with a particle size of 3-4mm and a uranium grade of 0.177% is evenly loaded into four unit columns with an inner diameter of 88mm. The height of the uranium ore column is 250mm, and a layer of granular Quartz sand with a diameter of 3-4mm and a thickness of 30mm. Then place four unit columns on a layered bench to form a serial column immersion test device. Use a liquid-solid ratio of 0.1L / kg to distribute the liquid every day. The concentration of sulfuric acid in the immersion solution is 5-20g / L, and the initial sulfuric acid concentration is 20g / L. Then adjust the concentration of sulfuric acid according to the change of pH value to keep the pH in the later stage. Between 1-2. The liquid distribution time is 8 hours per day, and the liquid distribution strength is 20.55L / h m 2 , The leaching time is 35d. The sampling time of each unit column is 4-4.5 hours after the liquid spraying every day. The total leachate was sampled before ...

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Abstract

The invention provides a tandem column soak test device. The tandem column soak test device is formed by connecting n unit columns in series, wherein a unit column comprises a communicating hole (1), a sealing cover (2), quartz sand (3), a sealing groove (4), a test ore (5), an organic glass column pipe (6), a flange (8), a perforated plate (9), a buffer space (10) and a communicating pipe (11); the sealing cover (2) is connected to the upper part of the organic glass column pipe (6) by the sealing groove (4) and can be opened; the buffer space (10) is connected to the lower part of the organic glass column pipe (6) by the flange (8), and the middle part of the buffer space is spaced by using the perforated plate (9); small round holes are arranged on the perforated plate (9), and the aperture of each of the small round holes is determined according to the particle size of the test ore; and the unit columns are connected in series by inserting the communicating pipe (11) of the previous unit column into the communicating hole (1) of the next unit column. According to the tandem column soak test device provided by the invention, the change of parameters such as the leaching rates of useful metals at different depths of an ore pile in a field dump leaching process, the consumption amounts of a leaching agent and an oxidant, the pH, the Eh and the like can be simulated, and reasonable process parameters in the field dump leaching process are determined. The tandem column soak test device is simple in structure, low in manufacturing and maintenance cost, convenient to take samples and easy to operate.

Description

technical field [0001] The invention belongs to the field of leaching mining, and in particular relates to a method of simulating and predicting on-site single-pile leaching, single-pile leaching followed by heap-turning leaching, single-pile leaching followed by string-heap leaching, and single-pile leaching followed by pile-on-pile leaching. The leaching rate, pH, Eh, leaching agent and oxidant concentration of useful metals at the bottom and at different depths change with time, and the series column leaching test device to determine the reasonable process parameters of on-site heap leaching. [0002] The invention also belongs to the field of environmental protection, and specifically relates to a method for simulating and predicting the removal rate of harmful metals at different depths, pH, Eh, leaching agent and oxidant concentration, etc. Changes over time, and a series column leaching test device for determining reasonable process parameters for on-site heap leaching....

Claims

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Application Information

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IPC IPC(8): C22B3/04C22B3/02
CPCY02P10/20
Inventor 丁德馨李广悦叶勇军胡南扶海鹰宋键斌王永东
Owner NANHUA UNIV
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