Energy-saving roasting method in formwork investment casting

A technology of investment casting and mold shell, which is applied in the field of investment casting mold shell roasting and energy saving, and can solve the problems of reduced electrical efficiency and increased equipment cost

Inactive Publication Date: 2011-09-21
应万才
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the evaporation and decomposition of water in the mold shell, the resistance wire will have a hydrogen embrittlement effect, and the addition of a protective cover to protect the resistance wire will increase the cost of the equipment and further reduce the electrical efficiency

Method used

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  • Energy-saving roasting method in formwork investment casting
  • Energy-saving roasting method in formwork investment casting
  • Energy-saving roasting method in formwork investment casting

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] Using the heat storage of various metal liquid metal casting mold shells with a casting temperature of 1500°C and a specific heat capacity of 0.837 or above, the dewaxed mold shells are dried and roasted to achieve no or less energy consumption.

[0021] A continuous formwork heat exchange furnace 2 with good thermal insulation performance, 15 meters in length, and double-layer roller support trays is used. The mold shells to be dried and roasted are placed in the tray 1 of the upper track of the furnace in the state of being cast; the mold shells after casting molten steel are placed in the tray 1 of the lower roller table; Under the conditions of radiation and radiation, sufficient heat exchange is carried out. There is a spare electric heating element at the discharge end of the mold shell, so that it can be used when the new furnace...

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Abstract

The invention discloses an energy-saving roasting method in formwork investment casting. The method is characterized in that a dewaxed formwork is dried and roasted by using accumulated heat of the formwork after liquid metal casting. The method has the advantages of high system heat efficiency, low energy consumption and low cost.

Description

technical field [0001] The invention relates to an energy-saving method for baking mold shells of investment casting. Background technique [0002] Regardless of using water glass, ethyl silicate or silica sol alone as a binder, or two kinds of composite investment casting, the mold shell must be dried at low temperature and fired at 900-1100°C after wax loss to make it ceramic. To meet the requirements of improving strength and increasing air permeability. At present, most factories in China use coal heating for formwork drying and roasting, but they have to be abandoned because the environmental protection cannot meet the standards; natural gas cannot be widely used because the supply is not guaranteed; therefore, most factories are using or planning to use electric heating. In the actual operation of electric heating drying and roasting formwork, due to the low thermal efficiency of the system, the power consumption is about 300-500KHW / ton of molten steel, which is about...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/12B22C9/04
Inventor 应万才施智宏
Owner 应万才
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