A kind of fly ash clinker sintering method
A sintering method and fly ash technology, applied in the field of clinker sintering, can solve the problems of high production cost, difficulty in adapting to large-scale production requirements, and low heat exchange efficiency, and achieve the effects of reducing burden, avoiding loss, and high thermal efficiency
Active Publication Date: 2015-11-18
SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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Problems solved by technology
[0016] In order to solve the above technical problems, the purpose of the present invention is to provide a method for sintering fly ash clinker, which solves the problems in the prior art that it is difficult to adapt to large-scale production requirements, low heat exchange efficiency, and high production cost.
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[0068] Such as figure 2 As shown, it mainly includes preheater 1, sintering kiln 2, cooler 3, hot blast stove 4, air heat exchanger 5, bag filter I6, fan I7, cyclone dust collector 8, bag filter II9, fan Ⅱ10, dust collection storage bin 11, ammonia absorption system 12, etc., the specific structure is as follows:
[0069] The raw material enters the preheater 1, the outlet of the preheater 1 is connected to the feed end of the kiln tail of the sintering kiln 2, and the air outlet of the preheater 1 is connected to the cyclone dust collector 8;
[0070] The discharge end of the kiln head of the sintering kiln 2 is connected to the inlet of the cooler 3 and the hot air pipe of the hot blast stove 4, and the output of the cooler 3 is the sintered clinker;
[0071] The flue gas inlet of the air heat exchanger 5 is connected to the air outlet of the cooler 3, and the flue gas outlet of the air heat exchanger 5 is connected to the bag filter Ⅰ6; the fresh air inlet of the air heat...
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The invention relates to a fly ash clinker sintering technology, especially relates to a clinker sintering method applied to the process for preparing alumina by fly ash-ammonium sulfate sintering method, and the method solves the problems that the prior art has the difficulties for meeting large-scale production requirements, and low heat exchange efficiency, high production cost, etc. The method comprises the following steps: clean hot air prepared by hot-blast stove is used as a heat source for sintering clinker; raw materials prepared from fly ash and ammonium sulfate enters from a preheater into a sintering kiln; raw materials in the preheater are preheated by the sintering kiln tail gas; the sintering kiln tail gas is cooled and enters into an ammonia gas absorption system; the raw material is sintered into clinker in the sintering kiln, and the clinker enters into a cooling machine and is cooled by cold air, and after heating, the cold air enters into a hot-blast stove for preparing clean hot air. The invention can satisfy large-scale industrial production, and avoid loss by generation of ammonia gas in sintering, and effectively recycle heat in the system, and thereby realizing energy saving and consumption reduction.
Description
technical field [0001] The invention relates to a fly ash clinker sintering technology, in particular to a clinker sintering method applied in the "fly ash-ammonium sulfate sintering process for producing alumina". Background technique [0002] In the "fly ash-ammonium sulfate sintering method to produce alumina process", ammonium sulfate and fly ash react in the clinker sintering kiln to produce clinker (mainly ammonium aluminum sulfate and silicon slag) and ammonia gas, which needs to be recycled. . Once the heat source contains carbon dioxide, the carbon dioxide will react with ammonia in the ammonia absorption system to form ammonium bicarbonate, resulting in the loss of ammonia. [0003] At present, there are two corresponding sintering technologies, that is, the indirect external heating reaction kiln technology and the patent 201120263968.5 "a sintering rotary kiln device for producing alumina from fly ash in a low-temperature ammonia process". [0004] "Indirect ex...
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IPC IPC(8): C01F7/02
Inventor 王亮郑绪滨张文
Owner SHENYANG ALUMINIUM MAGNESIUM INSTITUTE