Method and device for quickly dehydrating investment casting mould materials

Abstract

The invention provides a method and a device for quickly dehydrating investment casting mould materials. The method comprises the following steps of: storing water-containing mould materials in a storing and stirring vat, heating the water-containing mould materials to the temperature of between 70 and 120 DEG C with stirring, conveying the water-containing mould materials to a vertical type vacuum dehydrating tower by using a conveying pipe and a heat-insulated pump for dehydration, and before conveying the water-containing mould materials, preheating the conveying pipe, the heat-insulated pump and the vertical type vacuum dehydrating tower to the temperature of between 70 and 120 DEG C by using a heating system arranged between the storing and stirring vat and the vertical type vacuum dehydrating tower while heating the water-containing mould materials; and in the dehydrating process, filtering the water-containing mould materials by using a 40 to 80-mesh filter, conveying the water-containing mould materials in the vertical type vacuum dehydrating tower provided with filling materials or tower trays from a liquid distributing sprayer on the top part of the vertical type vacuum dehydrating tower for dehydration by using the heat-insulated pump and the conveying pipe, discharging air and vapor in the vertical type vacuum dehydrating tower by using a vacuum pump on the upper part of the vertical type vacuum dehydrating tower while dehydrating, and keeping the vacuum degree in the tower 0.03 to 0.1Mpa; and keeping the temperature in the tower between 70 and 120 DEG C, and periodically discharging the dehydrated mould materials on the bottom part of the tower by using a conveying pump, wherein the discharged mould materials can be reused as the investment casting mould materials after deslagging treatment. The method has the advantages of energy conservation, emission reduction and high application value.

Description

1. Technical field [0001] The invention relates to a rapid dehydration method for recovering investment casting mold material, which solves the problems of long processing time, high energy consumption, low efficiency and large space occupied by equipment in the existing static dehydration treatment method. 2. Background technology [0002] In the process of investment casting (also known as investment casting), melting and losing the casting (dewaxing) is one of the main processes. There are many methods of dewaxing, such as organic solvent method, hot water dewaxing method, high pressure steam dewaxing method, flash dewaxing method, microwave dewaxing method, hot sand dewaxing method, etc. The most widely used method is the high-pressure steam dewaxing method, which is also the mainstream of the current investment casting dewaxing method. It has the advantages of good shell quality and high wax recovery rate. However, there are often 5% to 15% water in the old mold materi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a rapid dehydration method for recovering investment casting mold materials, so as to solve the problems of low processing efficiency and high energy consumption in the above-mentioned prior art

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