Methylene blue adsorption testing method of bentonite

A test method and technology of bentonite, which are applied in the direction of material analysis by chemical reaction of materials and material analysis by observing the influence on chemical indicators, can solve the problems of low measurement accuracy, prolonged test process, repeated titration, etc. Accurate results, reduced labor intensity, and improved accuracy

Inactive Publication Date: 2010-08-18
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0008] The invention provides a method for testing the blue absorption of bentonite, which solves the problems that the existing detection method is complicated in operation, low i

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  • Methylene blue adsorption testing method of bentonite
  • Methylene blue adsorption testing method of bentonite
  • Methylene blue adsorption testing method of bentonite

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Effect test

Embodiment 1

[0048] Embodiment 1: the determination of bentonite blue absorption

[0049] 1. Solution processing steps: heat the mixed solution of 0.2g bentonite sample, 20mL of sodium pyrophosphate solution with a mass fraction of 1%, and 50mL of distilled water, stop heating after the solution is boiled for 5 minutes, and stir until the solution is evenly dispersed;

[0050] Two. Form the mixed solution step: the daily bentonite blue amount test value is 38mL, and the first methylene blue titration is estimated to be 30mL, quantitatively pipetting 30mL of pure methylene blue solution with a mass percentage concentration of 0.2% in the processed bentonite sample solution and Stir to form a mixture, go to step 4;

[0051] 3. Quantitative pipetting reagent step: quantitatively pipette the pure methylene blue solution with a mass percentage concentration of 0.2% in the treated bentonite sample solution and stir to form a mixed solution; control the methylene blue according to the area ratio ...

Embodiment 2

[0055] Embodiment 2: Determination of effective bentonite content in clay old sand

[0056] 1. Solution processing step: heat the mixed solution of 5 g of clay old sand, 20 mL of sodium pyrophosphate solution with a mass fraction of 1%, and 50 mL of distilled water, and stop heating after the solution is boiled for 5 minutes, and stir until the solution is evenly dispersed;

[0057] 2. The step of forming a mixed solution: the daily test value of the blue absorption amount of old sand is 85mL, and the first methylene blue titration is estimated to be 70mL, quantitatively pipette 70mL of pure methylene blue solution with a mass percentage concentration of 0.2% into the treated old sand solution And stir to form a mixture, go to step 4;

[0058] 3. Quantitative pipetting reagent step: quantitatively pipette the pure methylene blue solution with a mass percentage concentration of 0.2% in the treated old sand solution and stir to form a mixed solution, and control the area ratio T...

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Abstract

The invention relates to a methylene blue adsorption testing method of bentonite, which belongs to the field of methods for testing components of clay sand casting material, and solves the problems that a traditional detection method is quite complicated to operate, has lower determination precision, may titrate repeatedly and causes longer testing process. The testing method sequentially comprises a sample solution treatment step, a mixed solution forming step, a quantitative reagent shifting step, a drop spot image acquisition step and an image processing step. Aiming at bentonite methylene blue adsorption testing on a casting production line and the effective bentonite content determination in clay sand, the methylene blue adsorption testing method of bentonite can be realized on a computer, artificially and manually inputs an initial titration value, fully automatically sets and works, automatically acquires drop spot images and judges the final titration destination, can automatically calculate the methylene blue adsorption of bentonite and the effective bentonite content determination in clay sand, has accurate results, reduces the labor intensity of an experimenter, and improves the accuracy in judging the titration destination.

Description

technical field [0001] The invention belongs to a method for testing material components of casting clay sand, and in particular relates to a method for testing the blue absorption capacity of bentonite, which is used for testing the blue absorption capacity of bentonite and the effective bentonite content of old clay sand in a foundry production line. Background technique [0002] In the production of clay sand casting, according to the fact that montmorillonite minerals in bentonite can adsorb dyes such as methylene blue, while non-bonding materials such as dust, sand particles, and burned dead bentonite do not adsorb or absorb methylene blue dyes in a very small amount. Blue absorption test and determination of effective bentonite content in old sand. [0003] At present, there are three methods for the determination of bentonite blue absorption: [0004] The first method is to use pure manual titration according to the national standard detection method of the "Casting ...

Claims

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Application Information

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IPC IPC(8): G01N21/79
Inventor 樊自田龙威胡雪婷
Owner HUAZHONG UNIV OF SCI & TECH
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