VRH-CO2 method intelligent hardened sodium silicate sand test device

CN119528162AActive Publication Date: 2025-02-28ANHUI UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202411692848.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-25
Publication Date
2025-02-28
Estimated Expiration
2044-11-25

AI Technical Summary

Technical Problem

In the VRH experiment, CO2 wasted severely, water glass was used too much, and the sand mold was hardened unevenly, which affected the quality and performance of the mold.

Method used

A VRH-CO2 method intelligent hardening water glass sand test device was designed, and the pressure reduction, heating and flow of CO2 gas was controlled by MCGS equipment to achieve efficient utilization and recovery of CO2. The reaction process was monitored in real time with the vacuum studio and sensor to ensure the uniformity of sand hardening.

Benefits of technology

It effectively reduces CO2 waste and water glass usage, improves the rate of CO2 reaction with water glass, and ensures the uniformity of sand hardening and the quality and performance of casting.

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Abstract

The invention belongs to the technical field of casting, and particularly relates to a VRH-CO2 method intelligent hardened sodium silicate sand testing device. The device comprises a CO2 gas source with a pressure reducing valve group, a heater, a vacuum pump, a vacuum chamber and a CO2 recovery buffer tank, the CO2 gas source with the pressure reducing valve group is connected with the vacuum chamber through a pressure reducer, a manual air inlet valve, a heater, a CO2 air inlet electromagnetic valve and a CO2 flow meter; the vacuum chamber is connected with a CO2 recovery buffer tank through a vacuum pump and a CO2 recovery electromagnetic valve; the CO2 recovery buffer tank is connected with the vacuum chamber through a CO2 inlet electromagnetic valve, a one-way valve and a CO2 flow meter; the MCGS equipment is in signal connection with devices of the second part, the third part and the fourth part and can control a flow meter, a pressure reducer and a recovery electromagnetic valve to adjust the introduced CO2, so that the CO2 fully reacts with the water glass, and the reaction efficiency is improved; according to the present invention, the used CO2 is recycled, the whole reaction process can be intelligently monitored in real time, the structure is simple, the operation is reliable, the damage is not easy, the reaction rate of the CO2 and the water glass can be improved, and the water glass addition amount and the carbon emission are reduced.
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Citation Information

Patent Citations

  • Method for reducing alkali metal accumulation on casting modeling of water-glass sand to reduce emission of waste sand

    CN109570442A

  • Device for CO2 blowing hardening of sodium silicate-bonded sand in foundry

    CN115673251A

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    CN1225299A

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    CN203699929U

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