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A kind of bentonite quality evaluation method

A technology of quality evaluation and bentonite, which is applied in the direction of measuring devices, material analysis using radiation diffraction, instruments, etc., can solve the problems of not evaluating the core indicators of bentonite, and achieve the effect of simple and reliable evaluation method and strong applicability in industrial production

Active Publication Date: 2022-04-22
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above method can only indirectly judge the quality of bentonite, not the core index for evaluating bentonite

Method used

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  • A kind of bentonite quality evaluation method
  • A kind of bentonite quality evaluation method
  • A kind of bentonite quality evaluation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Embodiment 1, choose the natural bentonite of a certain city in Liaoning, according to the K determined by the test method of GB / T20973-2007 Appendix A cation exchange capacity and exchangeable cation content + 、Na + , Ca 2+ , Mg 2+ cation calculations.

[0074] Before sodium treatment

[0075] + =9.37mmol / 100g

[0076] + =31.13mmol / 100g

[0077] CEC （折合Na+总量） = + +2× +2× =71.63 mmol / 100g.

[0078] After sodium treatment

[0079] + =35.39mmol / 100g

[0080] + =19.82mmol / 100g

[0081] CEC （折合Na+总量） = + +2× +2× =75.03 mmol / 100g.

[0082] According to the characteristics of montmorillonite, the CEC in the middle of the montmorillonite sheet is usually in the range of 60-120mmol / 100G, which is equivalent to Na before and after sodium treatment. + The total deviation is 4.53%, and the natural bentonite quality grade of embodiment 1 is relatively poor.

[0083] The interlayer distance d was measured by X-ray diffraction method (001)...

Embodiment 2

[0084] Embodiment 2, choose the natural bentonite of a certain city in Jilin, according to the K determined by the test method of GB / T20973-2007 Appendix A cation exchange capacity and exchangeable cation content + 、Na + , Ca 2+ , Mg 2+ The cation calculation:

[0085] Before sodium treatment

[0086] + =13.29mmol / 100g

[0087] + =39.52mmol / 100g

[0088] CEC （折合Na+总量） = + +2× +2× =92.33 mmol / 100g.

[0089] After sodium treatment

[0090] + =76.21mmol / 100g

[0091] + =8.56mmol / 100g

[0092] CEC （折合Na+总量） = + +2× +2× =93.33 mmol / 100g.

[0093] According to the characteristics of montmorillonite, the CEC in the middle of the montmorillonite sheet is usually in the range of 60-120mmol / 100G, which is equivalent to Na before and after sodium treatment. + The total deviation is 1.07%, and the natural bentonite quality grade of embodiment 2 is medium.

[0094] The interlayer distance d was measured by X-ray diffraction method (001) is 1.3...

Embodiment 3

[0095] Embodiment 3, choose the natural bentonite of a city in Inner Mongolia, the K measured according to the test method of GB / T20973-2007 appendix A cation exchange capacity and exchangeable cation content + 、Na + , Ca 2+ , Mg 2+ cation calculations.

[0096] Before sodium treatment

[0097] + =22.35mmol / 100g

[0098] + =55.16mmol / 100g

[0099] CEC （折合Na+总量） = + +2× +2× =132.67 mmol / 100g.

[0100] After sodium treatment

[0101] + =76.53mmol / 100g

[0102] + =24.96mmol / 100g

[0103] CEC （折合Na+总量） = + +2× +2× =126.45mmol / 100g.

[0104] According to the characteristics of montmorillonite, the CEC in the middle of the montmorillonite sheet is usually in the range of 60-120mmol / 100G, which is equivalent to Na before and after sodium treatment. + The total deviation is 4.91%, and the bentonite quality grade of embodiment 3 is higher.

[0105] The interlayer distance d was measured by X-ray diffraction method (001) is 1.29 nm, and the...

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Abstract

The invention discloses a bentonite quality evaluation method. Adopt equivalent cation exchange capacity to be used for evaluating core index of bentonite quality; Described equivalent cation exchange capacity will K + 、Na + , Ca 2+ , Mg 2+ The total amount of cations is converted to Na + Total amount; one price of K + 、Na + The amount of cation substances are converted into a unit of Na + amount, divalent Ca 2+ , Mg 2+ The amount of the cation substance is converted into two units of Na respectively + Quantity; equivalent to Na + The total amount is K + 、Na + , Ca 2+ , Mg 2+ Cationic converted Na + The sum of the amount; the degree of sodium treatment is used as an auxiliary judgment for evaluating the core index of bentonite quality; the degree of sodium treatment of bentonite is determined by the layer spacing d of the layered structure of montmorillonite (001) The measurement calculates the sodiumization rate, the sodiumization rate is represented by the symbol N, and the calculation formula of the sodiumization rate is as follows: N=(‑333.3d (001) +516.6)%. The present invention proposes that the quality judgment index of bentonite has great consistency in the quality judgment of bentonite in different application fields.

Description

technical field [0001] The invention relates to a bentonite quality evaluation method, which is suitable for the quality evaluation method of bentonite application fields such as metallurgical pellets, oil drilling, feed addition, and construction. Background technique [0002] Bentonite ore is an important mineral resource variety in non-metallic ore, known as "universal clay". Bentonite is a clay rock whose main component is montmorillonite, and its accurate name should be montmorillonite clay. China's bentonite mineral resources are rich and widely distributed, and bentonite mines have been produced in 26 provinces and regions across the country. [0003] According to the types of cations that can be exchanged between the montmorillonite layers, it is divided into calcium-based, sodium-based, hydrogen-based, aluminum-based montmorillonite, also commonly known as calcium-based bentonite, sodium-based bentonite, etc., of which calcium-based bentonite accounts for 80% of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/207G16C20/10
CPCG01N23/20G16C20/10G01N2223/056G01N2223/1016
Inventor 杨大兵陈勇
Owner WUHAN UNIV OF SCI & TECH
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