Fly ash product sintering furnace and method and formula thereof

Abstract

The invention discloses a fly ash product sintering furnace, which comprises a furnace body, a tower grate type discharge ventilation device, a diversion ring, an annular air pipe and an air induction apparatus, wherein the furnace body is provided with a furnace inner shell and a furnace outer shell; a furnace chamber for containing a material is formed in the furnace inner shell; the upper end of the furnace chamber is an ignition end, and the lower end of the furnace chamber is an air induction end; the tower grate type discharge ventilation device is rotatably arranged at the bottom end of the furnace chamber and supports the material in the furnace chamber; the diversion ring is of cylindrical shape and arranged between the furnace inner shell and the furnace outer shell; the annular air pipe is arranged around the outside of the furnace body and provided with an air induction port and multiple ventilation pipelines connected with the furnace outer shell; the air induction apparatus is connected with the air induction port; the diversion ring and the furnace inner shell form a passage; and the high-temperature air in the furnace chamber flows in the passage along the outer side of the furnace inner shell and is used for secondarily heating the furnace chamber. The invention also discloses a sintering method applicable to the sintering furnace. The invention also provides a formula of the fly ash ceramsites applicable to the sintering furnace and the sintering method.

Description

technical field [0001] The invention relates to a sintering furnace for fly ash products, a sintering method for fly ash products and a formula for fly ash ceramsite. Background technique [0002] As a lightweight aggregate, fly ash ceramsite is a kind of artificial lightweight aggregate made of fly ash as the main raw material through metering, batching, molding and sintering. Fly ash ceramsite is generally spherical, rough and hard, and has strong durability in terms of frost resistance, water absorption, stability, softening coefficient, etc., and the concrete made of fly ash ceramsite is better than natural stone The concrete produced is strong. Therefore, fly ash ceramsite has been widely used to prepare high-strength lightweight concrete for various purposes. According to needs, plain ceramsite concrete and prestressed ceramsite concrete of different grades can be prepared, and construction methods such as prefabrication, cast-in-place, sliding formwork, and mechanic...

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Problems solved by technology

[0007] Our country has already used sintering machines and rotary kilns to sinter fly ash ceramsite precedents, but due to the performance limitations of the equipment itself, low production efficiency, high energy consumption, and serious environmental pollution, it has not been able to form a large scale.

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