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Purification and activation method of secondary and tertiary diatomite for preparing diatom ooze

An activation method and diatomite technology, applied in the directions of silicon oxide, silicon dioxide, etc., to achieve the effect of increasing adsorption effect, reducing emission and avoiding environmental pollution

Inactive Publication Date: 2017-08-08
JILIN JIANZHU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to solve the problem of diatomite purification and activation in the existing diatom ooze used in the above-mentioned, and a purification and activation method of diatomite for preparing diatom ooze is provided, aiming at improving the pore size of the diatom shell And to stimulate its activity, so that the second and third grade diatomite can play its advantages in the application of diatom mud

Method used

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  • Purification and activation method of secondary and tertiary diatomite for preparing diatom ooze
  • Purification and activation method of secondary and tertiary diatomite for preparing diatom ooze
  • Purification and activation method of secondary and tertiary diatomite for preparing diatom ooze

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Experimental program
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Effect test

Embodiment 1

[0017] 1) Grind the raw diatomite ore of the second and third grades for 15 minutes, and set the speed of the ball mill to 200r / min to obtain 250-mesh powdered diatomite;

[0018] 2) Take 100 grams of powdered diatomaceous earth from step 1) and add water to disperse according to solid: liquid = 1:3, then add 0.8L of 60% concentrated sulfuric acid, put it into a constant temperature 60°C reaction kettle and stir at a constant speed, the stirring rate is 300r / min, stirring time is 1h, washed with water to neutral PH=7, filtered the washed diatomaceous earth, put it in an oven at 80°C for 6 hours, and cooled to room temperature to obtain pickled diatoms earth;

[0019] 3) Put the pickled diatomite in step 2) in a high-temperature furnace, pump the furnace into an anaerobic state, and then fill it with equal-pressure nitrogen protection, set the initial temperature to 50°C, and the heating rate to 5°C / min, the anaerobic heat activation temperature is 600°C, and the anaerobic h...

Embodiment 2

[0021] This embodiment is prepared by the commonly used aerobic thermal activation method

[0022] 1) Grind the raw diatomite ore of the second and third grades for 15 minutes, and set the speed of the ball mill to 200r / min to obtain 250-mesh powdered diatomite;

[0023] 2) Take 80 grams of powdered diatomite from step 1) and add water to disperse according to solid: liquid = 1:3, then add 0.64L of 60% concentrated sulfuric acid, put it into a constant temperature 60°C reactor and stir at a constant speed at a rate of 300r / min, stirring time is 1h, washed with water to neutral PH=7, filtered the washed diatomaceous earth, put it in an oven at 80°C for 6 hours, and cooled to room temperature to obtain pickled diatoms earth;

[0024] 3) Put the pickled diatomite in step 2) in a high-temperature furnace for aerobic heat activation treatment, set the initial temperature to 50°C, the heating rate is 5°C / min, and the aerobic heat activation temperature is 600°C. The aerobic therm...

Embodiment 3

[0026] 1) First, grind the secondary and tertiary diatomite raw ore machine for 10 minutes, and adjust the speed of the ball mill to 200r / min to obtain 250 mesh powdery diatomite;

[0027] 2) Take 200 grams of powdered diatomite from step 1) and add water to disperse according to solid: liquid = 1:2.5, then add 1.5L of 50% concentrated sulfuric acid, put it into a constant temperature 60°C reaction kettle and stir at a constant speed, the stirring rate is 300r / min, stirring time is 2h, washed with water to neutral PH=7, filtered the washed diatomaceous earth, put it in an oven at 80°C for 6h, cooled to room temperature, and obtained pickled diatom earth;

[0028] 3) Put the pickled diatomite in step 2) in a high-temperature furnace, pump the furnace into an anaerobic state, and then fill it with equal-pressure nitrogen protection, set the initial temperature to 50°C, and the heating rate to 5°C / min, the anaerobic heat activation temperature is 400°C, and the anaerobic heat ...

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Abstract

The invention discloses a purification and activation method of secondary and tertiary diatomite for preparing diatom ooze. A specific research method is characterized by firstly purifying diatomite, adjusting the pore diameter of the diatomite to improve adsorption performance of the diatomite, then carrying out oxygen-free thermal activation treatment on the diatomite, improving pozzolanic activity of the diatomite, fully using micro-aggregate effect and the pozzolanic activity of the diatomite, and improving the durability and the strength of the diatom ooze. Through the method, the purification and the activation of the diatomite used as functional filler of the diatom ooze are researched; the research results show that the content of SiO2 in the purified and activated diatomite is not less than 80%, the average particle size is 5-7 microns, the specific surface area is 25-30m<2> / g, the whiteness is 70-85%, and the pozzolanic activity index is not less than 78%. Through the purification and activation method of the secondary and tertiary diatomite for preparing the diatom ooze, the requirements of the non- pollution technology are met; the reasonable utilization of resources is ensured.

Description

technical field [0001] The invention discloses a purification and activation method of second and third grade diatomite used for preparing diatom mud, and relates to a novel purification and activation method of second and third grade diatomite specially used for the production of diatom mud, belonging to The technical field of non-metallic ore purification. [0002] technical background [0003] With the gradual improvement of people's requirements for the coordination of indoor environment and air quality, a kind of indoor air conditioning not only has the functions of purifying indoor air, adjusting indoor humidity, antibacterial and anti-mildew, but also can prepare different textures and colors on the decorative wall. , the functional diatom mud interior wall environmental protection decoration material known as the "breathing wall", quickly occupied the wall material market. As of May 2017, there were more than 500 domestic brand diatom mud manufacturers. However, the ...

Claims

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Application Information

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IPC IPC(8): C01B33/12
CPCC01B33/12C01P2002/72C01P2004/03C01P2004/61C01P2006/12C01P2006/60C01P2006/80
Inventor 肖力光庞博
Owner JILIN JIANZHU UNIVERSITY
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