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A dynamic leaching residue sampling device

A sampling device and residue technology, applied in the field of chemical extraction experiments, can solve the problems of consuming a large amount of shower solution, cumbersome procedures, and uneconomical

Active Publication Date: 2019-04-23
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention solves the technical problems that the existing leaching experimental system needs to consume a large amount of leaching solution, is uneconomical, and has cumbersome procedures.

Method used

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  • A dynamic leaching residue sampling device
  • A dynamic leaching residue sampling device
  • A dynamic leaching residue sampling device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, the dynamic leaching residue sampling device of the present invention includes a leaching column 1 and a sample holder 2 placed in the leaching column. The leaching column 1 is made of transparent plexiglass, which can observe the water-rock reaction process and progress in real time during the experiment. The sample holder 2 is made of polytetrafluoroethylene, which is in the shape of a cylindrical cone with a thick top and a thin bottom. The diameter of the upper end is slightly smaller than the inner diameter of the leaching column, and a diversion hole (not shown in the figure) is left at the bottom. PTFE has strong acid and alkali resistance, good stability, and is not easy to react with the leaching solution, and does not pollute the sample; the cylindrical cone-shaped design with a thick top and a thin bottom makes the leaching solution dripped into the surface sample in a planar shape During the infiltration process, it can fully cont...

Embodiment 2

[0043] 2.1 Selection of weathering index

[0044] Using chemical alteration index (CIA) and silicon aluminum ratio (SiO 2 / Al 2 o 3 ) and other two geochemical weathering indicators to judge the weathering characteristics of dynamic leaching residues.

[0045] (1) CIA

[0046] CIA is used to quantitatively evaluate the degree of weathering of feldspar silicate components, and its expression is:

[0047] CIA=[Al 2 o 3 / (Al 2 o 3 +CaO*+Na 2 O+K 2 O)]×100

[0048] In the formula, each oxide is the number of moles (mol); CaO* is the CaO in the silicate phase, and Ca needs to be deducted if the sample contains carbonate or phosphate. In practice, when CaO(mol)≥Na 2 At O(mol), CaO*=Na 2 O; when CaO(mol)2 When O (mol), CaO*=CaO.

[0049] During the chemical weathering process, with the decomposition of feldspar-like silicate minerals, base ions such as Ca, Na, and K gradually leached away, Al was enriched in the weathered residue, and the CIA value showed an increasing ...

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Abstract

The invention discloses a dynamic leaching residue sampling device which comprises a leaching column and sample accommodating devices placed in the leaching column. A spray head is installed at the upper end of the leaching column, and a liquid discharging conduit is installed at the lower end of the leaching column. Sample loading tables are installed in the leaching column, the number of the sample loading tables is an integer larger than or equal to 1, and on each sample loading table, one sample accommodating device is placed. The sample loading tables are provided with flow guide holes. The bottoms of the sample accommodating devices are provided with flow guide holes. The device is in an identical leaching system, sampling of dynamic leaching residue of a tested sample is finished along with leaching process, leachate is saved, and a parallel leaching system does not need to be manufactured. The device is simple, easy to operate and good in repeatability, and technicians can learn and master the dynamic leaching residue sampling device easily.

Description

technical field [0001] The invention belongs to the technical field of chemical extraction experiments, in particular to a dynamic leaching residue sampling device. Background technique [0002] In supergene geochemical research, relying entirely on the development characteristics of field weathering profiles, it is sometimes difficult to truly reveal the elemental geochemical behavior and mineralogy alteration mechanism during rock weathering. The reason is: in the process of rock weathering to form a weathering profile, as the weathering fluid penetrates downward, the fine-grained mineral components (such as colloidal particles) leached from the upper part of the profile are deposited in the lower part of the profile; in addition, the lateral migration of the weathering fluid It may also lead to the introduction of exogenous components into the weathering profile. Due to the deposition of foreign substances in the weathering profile, the true information of the elemental ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/20G01N1/34
CPCG01N1/20G01N1/34
Inventor 冯志刚马强韩世礼胡杨段先哲谢焱石陈亮
Owner NANHUA UNIV
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