Regenerative precoated sand roasting furnace

Abstract

The invention relates to the technical field of precoated sand roasting energy conservation, and discloses a regenerative precoated sand roasting furnace. The regenerative precoated sand roasting furnace comprises a body, wherein a combustion chamber is arranged in the body, an igniter facing the interior of the combustion chamber is installed on the body, the regenerative precoated sand roastingfurnace comprises a feeding chamber fixed to one side of the body, one side of the combustion chamber communicates with the feeding chamber, the side, away from the feeding chamber, of the combustionchamber communicates with a preheating bag, and the preheating bag communicates with a waste gas pipe; a baffling channel is arranged in the feeding chamber, and a preheating cavity communicating withthe waste gas pipe is formed in the side wall of the feeding chamber; and the preheating cavity communicates with the waste gas pipe. The regenerative precoated sand roasting furnace is simple in structure, waste gas exhausted from the combustion chamber is fed into the feeding chamber to preheat sand, the sand with a certain temperature enters the combustion chamber, heat consumption in the combustion chamber can be reduced, then use of natural gas is reduced, and the roasting cost of the sand is reduced.

Description

technical field [0001] The invention relates to the technical field of coated sand roasting and energy saving, and specifically discloses a regenerative coated sand roasting furnace. Background technique [0002] Coated sand is the molding sand or core sand whose surface is covered with a layer of solid resin film. The preparation process of coated sand has two kinds of cold method and hot method: the cold method dissolves the resin with ethanol, and adds urotropine during the sand mixing process, so that the two are coated on the surface of the sand grains, and the ethanol volatilizes to obtain the coated sand. Coated sand: roast the sand to a certain temperature by thermal method, add resin to melt it, coat the resin on the surface of the sand by stirring, add urotropine aqueous solution and lubricant, cool, crush and sieve to obtain the coating Sand and coated sand are mainly used for steel castings and iron castings. [0003] When preparing coated sand by thermal metho...

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Problems solved by technology

[0003] When preparing coated sand by thermal method, the roasting furnace is used to roast the sand grains. When the sand grains enter the roasting furnace, they are cold sand grains. The cold sand grains need to consume more heat in the roasting furnace from low temperature to high temperature. Therefore, the consumption in the roasting furnace The amount of natural gas will increase, which will lead to an increase in the cost of sand roasting

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