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A process for producing active lime

A technology of active lime and process method, applied in the field of active calcium production, can solve the problems of low gas utilization rate, high heat consumption, low limestone pre-decomposition rate, etc., and achieve the effect of improved optimization

Active Publication Date: 2016-01-06
米长山
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Problems solved by technology

And this method solves the problems of low limestone pre-decomposition rate, low gas utilization rate and high heat consumption when producing active lime

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  • A process for producing active lime

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Embodiment Construction

[0018] Before launching the embodiment of the present invention, it is necessary to analyze the problems existing in the traditional calcined limestone process in the past and even now: the pre-decomposition rate of limestone in the traditional vertical preheater can reach up to 30%, and the remaining 70% is decomposed in the rotary kiln Calcined. The rotary kiln is an open-type calcination equipment. The limestone is continuously tumbling in the rotary kiln, which is conducive to the uniform calcination of the large and small particle size limestone. o The calcination temperature of C, because the lime kiln has no kiln skin protection, the surface temperature of the simplified body is as high as 300 o Above C, the heat dissipation loss of the cylinder is about 150kcal / kg·Ca0, accounting for about 13% to 15% of the total heat consumption of the system. The preheater is mainly based on convective heat transfer. Although the heat exchange area is large, the requirements for flu...

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Abstract

The invention relates to a technique method for producing active lime. The technique method comprises the following steps: firstly pulverizing raw material limestone, so as to enable the raw material not to enter a preheater in a blocky manner. In the follow-up primary calcination and curing calcinations stages, the traditional equipment and production technique are incomparable with the completely curing results generated by the continuous calcination procedures through the preheater, an external kiln splitter and a rotary kiln; furthermore, through an insulating layer structure and a protruding structure on the surface of an inner cavity of the rotary kiln, the insulating property of the rotary kiln is superior to the conventional technology, powder can be sufficiently stirred evenly through protrusions on the inner cavity of the rotary kiln in the production process of the rotary kiln, so that the optimization of the calcination effects can be improved.

Description

technical field [0001] The invention relates to a method for producing active calcium through technical means such as vertical mill, preheater, decomposition outside the kiln, and gas-fired rotary kiln, especially a process for producing active lime. Background technique [0002] The active lime rotary kiln system has the advantages of high output, good and stable lime quality, and the ability to calcine small-grained limestone. my country's lime production industry has undergone great changes, with the introduction of rotary kilns from Krauss-Maffei from Germany, Mitsubishi from Japan, and Metso from the United States; The sleeve kiln of the company, the double girder kiln and "beam bridge" sleeve kiln of Italy Fukas company, and the double "D" kiln of Italy Sim company, the suspension kiln of German Boli Hughes company, the Italian Frieda company The beam kiln of Japan Sumitomo Co., Ltd. coke kiln. At the same time as the introduction, domestically developed rotary kilns, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B2/02C04B2/10
Inventor 米长山霍殿龙米振超郭海山郭琪刘忠岳
Owner 米长山