Method for stabilizing specific surface area of grinding powder

A specific surface area and grinding technology, which is applied in cement production, grain processing, etc., can solve the problems of manpower and material resources consumption, energy waste, control lag, etc., and achieve the effect of reducing labor intensity, improving control effect, and ensuring smooth operation

CN106824481AActive Publication Date: 2017-06-13CNBM HEFEI POWDER TECH EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-06-13

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Abstract

The invention discloses a method for stabilizing a specific surface area of grinding powder, and belongs to the technical field of cement roller press pregrinding. The method comprises the steps as follows: S1, acquiring the specific surface area of the grinding powder and a rotating speed of a powder concentrator, S2, determining pure lag time and inertia process duration from adjustment of the rotating speed of the powder concentrator to variation of the specific surface area of the grinding powder, S3, determining a prediction time domain and a control time domain, S4, establishing an optimization objective function and solving the optimization objective function to obtain optimal variation quantity of the rotating speed of the powder concentrator within the control time domain, S5, calculating a control value of the rotating speed of the powder concentrator in a next step to control operation of the powder concentrator, and S6, substituting a measured value of the rotating speed of the powder concentrator in a next step and a feedback value of the specific surface area of the grinding powder in a next step into the optimization objective function at a next moment and then circularly performing S4-S5. According to the method, the rotating speed of the powder concentrator is adjusted in real time by variation quantity of the specific surface area of the grinding powder and a rotating speed of a circulating fan, so that the specific surface area of the grinding powder is stabilized near a set value; and smooth operation of equipment is facilitated.
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Description

Technical field

[0001] The invention relates to the technical field of cement roller press pre-grinding, and in particular to a method for stabilizing the specific surface area of ​​the powder body. Background technique

[0002] The purpose of the roller press pre-grinding system is to grind relatively coarse raw materials (mainly clinker, mixed with a certain amount of slag, gypsum and other mixed materials) into relatively fine raw materials. The main equipment of the system is: batching system, conveying system, V-type static air classifier, roller press system, powder separator, circulating fan, high-efficiency cyclone dust collector.

[0003] The working process of the system is: the main equipment of the batching system is a quantitative dosing scale. Each raw material has a corresponding dosing scale. The frequency converter of the quantitative dosing scale controls the feeding amount and ratio of various raw materials. The conveying system includes a belt conveyor and a ho...

Examples

Embodiment Construction

[0030] In order to further explain the features of the present invention, please refer to the following detailed description and drawings of the present invention. The attached drawings are for reference and explanation purposes only, and are not used to limit the protection scope of the present invention.

[0031] Such as Figure 1 to Figure 2 As shown, this embodiment discloses a method for stabilizing the specific surface area of ​​the powder body, including the following steps S1 to S6:

[0032] S1, real-time collection of the specific surface area of ​​the powder body and the speed of the separator;

[0033] In practical applications, first use an online particle size analyzer installed in the grinding head to sample the incoming powder in real time, and detect the specific surface area of ​​the incoming powder, and read the speed of the separator in real time from the frequency converter.

[0034] S2. Determine the pure lag time and inertia process time for the speed of the powd...