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Method for producing enamel nodular graphite cast iron

A technology for ductile iron pipes and production methods, which is applied in the field of production of enamelled ductile iron pipes, can solve the problems that the cement layer is easy to fall off, affects the appearance, and the cast iron pipes are easy to rust, and the method is simple and practical, ensuring drinking water safety and production efficiency high effect

Inactive Publication Date: 2008-09-03
田金洁
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] Many office buildings and residential buildings use ductile iron pipes as water supply pipes. Because cast iron pipes are easy to rust, the inner wall of general water supply cast iron pipes is coated with a cement protective layer, but the cement layer is easy to fall off after being bumped, and it is also easy to pollute and carry bacteria. Pollution of water quality, serious blockage of pipes
At the same time, the installation of cast iron pipes in the interior space of the room also affects the appearance

Method used

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Embodiment Construction

[0013] The method of the invention adopts the national standard ductile iron pipe as a base material to produce ductile iron water supply pipes, and is particularly suitable for producing ductile iron water supply pipes with flanges. When producing ductile iron pipes with flanges, the flanges are sprayed with a primer like the outer wall of the cast iron pipe.

[0014] A specific formula of the bottom glaze in terms of weight percentage is: borax: 28.6%, quartz: 26.2%, feldspar: 22.3%, sodium silicate 3.8%, fluorite: 7.0%, antimony oxide: 12.1%. After mixing, the total weight is 100%.

[0015] A specific formula of the surface glaze in terms of weight percentage is: borax: 36.2%, quartz: 28.8%, feldspar: 10.7%, sodium silicate 6.6%, titanium oxide: 17.7%. After mixing, the total weight is 100%.

[0016] The method of the invention is suitable for producing enamelled ductile iron pipes with an inner diameter of 100-600 mm and a length of 4-6 meters. The matching elbows, tees...

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Abstract

The invention relates to a production method for enamel ductile cast iron pipe, particularly suitable for producing ductile cast iron water supply pipe with flange; the invention aims to extend the service life of the enamel ductile cast iron pipe, beautify the appearance, and make the enamel ductile cast iron pipe non-toxic and sterile. The method comprising the following steps: soaking cleaning with aulfuric acid solution and then drying; preparing ground coat and surface glaze respectively to spraying, putting a ductile cast iron pipe into a enamel stove, and tapping after high-temperature sintering; and naturally cooling.

Description

technical field [0001] The invention relates to a production method of an enamel ductile iron pipe. Background technique [0002] Many office buildings and residential buildings use ductile iron pipes as water supply pipes. Because cast iron pipes are easy to rust, the inner wall of general water supply cast iron pipes is coated with a cement protective layer, but the cement layer is easy to fall off after being bumped, and it is also easy to pollute and carry bacteria. Pollution of water quality, serious will also block the pipeline. At the same time, the installation of cast iron pipes in the interior space of the room also affects the appearance. Contents of the invention [0003] The object of the present invention is to overcome the disadvantages of the above-mentioned prior art, and provide a production method of an enamelled ductile iron pipe with long service life, beautiful appearance, aseptic and non-toxic. [0004] The invention adopts the ductile iron pipe as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23D5/04C23D3/00
Inventor 田金洁
Owner 田金洁
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