Method for soft measurement of iron ore sintering process state

A sintering process and soft measurement technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of lack of theoretical basis and universality in the value of set temperature.

Active Publication Date: 2015-11-11
CENT SOUTH UNIV
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Problems solved by technology

The value of the set temperature in this method lacks a theoretical basis, and it will vary due to different production conditions in practical applications, so it is not universal

Method used

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  • Method for soft measurement of iron ore sintering process state
  • Method for soft measurement of iron ore sintering process state
  • Method for soft measurement of iron ore sintering process state

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0036] In this embodiment, the soft measurement method for the state of the iron ore sintering process is based on the temperature division standards and moving characteristics of each zone (drying zone, combustion zone, and sintering zone) of the iron ore sintering material layer, based on the exhaust gas temperature detected online, using The segmental fitting method calculates the position of exhaust gas temperature rise point (TRP), inflection point (BRP) and sintering end point (BTP) (such as figure 1 ), and divide the state interval according to the statistical characteristics of each parameter to characterize the state of the sintering process. μ represents the mean value of the process state parameters in a certain period of time, σ represents the standard deviation, and the state is divided as follows:

[0037] Table 1 Division of process states...

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Abstract

The invention discloses a method for soft measurement of an iron ore sintering process state. The method comprises the following steps of rearranging bellows waste gas temperature within a period of time, adopting curve fitting according to different subsections in the sintering process, and respectively calculating the positions of a waste gas temperature rising point TRP, an inflection point BRP and a sintering terminal point BTP. According to a provided sintering process state parameter soft measurement model, the moving law of a sintering material on a sintering trolley is considered; the bellows waste gas temperature within a period of time is rearranged, the curve fitting is adopted according to the different subsections in the sintering process, and the process state parameters TRP, BRP and BTP are solved respectively. The changes of the TRP and BTP obtained through calculation have a time sequence property, and the actual production conditions can be reflected more accurately.

Description

technical field [0001] The technology of the invention belongs to the technical field of soft measurement of iron ore sintering process parameters, and in particular provides a soft measurement method for the state of sintering process. Background technique [0002] Iron ore sintering is the first process of modern iron and steel enterprises. The stability of its production process has an important impact on the stability and technical and economic indicators of blast furnace ironmaking and even the entire iron and steel production. Theoretically speaking, the state of the sintering process mainly includes the gas permeability state and the thermal state. Due to the characteristics of production, these parameters are difficult to directly detect online. Therefore, the accurate characterization of the state of the sintering process becomes the core link of the stable optimal control. [0003] The sintering end point (BTP) is the earliest and most commonly used method. The si...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16G06F17/50
Inventor 范晓慧陈许玲甘敏黄晓贤姜涛李光辉郭宇峰杨永斌袁礼顺杨桂明黄柱成张元波李骞
Owner CENT SOUTH UNIV
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