Method for reducing conductivity of inorganic reclaimed sand
A technology for reclaiming sand and electrical conductivity, applied in chemical instruments and methods, machinery for cleaning/processing of casting materials, water/sludge/sewage treatment, etc. Problems such as increased conductivity of recycled sand
Pending Publication Date: 2021-04-02
南阳仁创再生资源有限公司
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- Abstract
- Description
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- Application Information
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Problems solved by technology
However, due to the Na on the surface of inorganic old sand 2 SiO 3 It can be dissolved in water during the regeneration process, and the residue will be hidden in the water in the form of ions, which will accumulate more and more, and the repeated use of circulating water will cause the conductivity of the reclaimed sand to rise rapidly, making it impossible to reuse
At present, there are no relevant reports on reducing the conductivity of circulating water during the wet regeneration of inorganic sand.
Method used
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Embodiment 1
[0052](1) Inorganic old sand wet regeneration:
[0053]1 Inorganic Old Sand is crushed to 20 mesh or less, and it is sent to the old sand material warehouse to be regenerated.
[0054]2 Inorganic Old Sand Pass, from the old sand mold bin to the ultrasonic washing area, and the concentration of 1 mol / L is added to the sand water mixture by the PLC control solenoid, and the pH is controlled at 6 to 8. Ultrasonic washing zone is provided with 20 ultrasonic vibrators, and the ultrasonic frequency is 40 kHz, and a stirred rotor is also provided with a rotational frequency of 120 r / min. The sand is 1: 1.2, the washing time is 6 min.
[0055]3 After the ultrasonic washing is completed, the sand and first sewage are obtained by the sand water separation device. The grain enters the stirred washing area for rinsing, the washing time is 3 min, and the sand water ratio is 1: 1.2.
[0056]4 After the mixing is washed, the sand is separated into the drying area through the sand water separation device, ...
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Abstract
The invention provides a method for reducing conductivity of inorganic reclaimed sand. The method comprises the following steps: carrying out wet reclamation on inorganic used sand, and treating sewage generated in the reclamation process: carrying out flocculent precipitation on the sewage, adding a chemical precipitator for precipitation, and removing inorganic ions through a reverse osmosis membrane to obtain circulating water. The ion concentration in the circulating water is relatively low, and the circulating water is used as reclaimed water, so that the conductivity of the inorganic reclaimed sand can be maintained at a relatively low level. The sludge obtained in the sewage treatment process can be directly used as a raw material for preparing ceramsite. The whole process is zero-emission, and realizes green circular economy of waste materials.
Description
Technical field[0001]The present invention relates to the field of resource recovery, and more particularly to a method of reducing an inorganic regenerative sand conductivity.Background technique[0002]Green Environmental Casting Development is an important industrial upgrade direction for the development of the foundry industry. At the same time, the inorganic binder material replaces the traditional resin material is also a key component of the casting industry upgrade. Since the main ingredient of the inorganic binder is modified NA2SiO3In addition, adding ingredients in the sand sand to SiO2, Al2O3Metal oxides consisting of reinforced powders, micro-nanoscale organic smooth, no large amount of smoke and irritating odor during the casting of metal liquid, which has a very obvious environmental advantage. In recent years, inorganic sand has been gradually applied to the cast aluminum engine cylinder head in the domestic market, and the main auto parts such as steering fees, and th...
Claims
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IPC IPC(8): C02F9/04B22C5/00C04B28/00C02F101/10
CPCC02F9/00B22C5/00C04B28/00C02F1/5236C02F1/56C02F1/001C02F1/281C02F1/441C02F2101/10C04B18/0418C04B18/14C04B18/08
Inventor 包羽冲尹海军冯俊龙李卓情唐品
Owner 南阳仁创再生资源有限公司