A method for automatically adding water to sintering mixture

Abstract

The invention discloses a sinter mixture automatic water adding device and method, and belongs to the technical field of sintering machine mixture water adding devices and methods. A sinter mixture is subject to automatic water adding. According to the technical scheme, a microwave moisture instrument is added at the position, in front of a mixing machine, of a mixing belt, a sealing cover is additionally arranged at the position above a site material field material with an infrared water instrument, a material flattening device is mounted at the position, behind the mixing machine, of a discharging belt, a pressurizing tank is additionally arranged on a nitrogen blowing pipeline used by the infrared water instrument, and a digital environment temperature measuring instrument is mounted on the wall of a workshop. The automatic water adding method comprises following steps of dry material value calculation, water adding flow calculation, same-area water adding flow timing and quantitative rapid compensation correction, frequency conversion water feeding pump frequency output calculation and valve opening degree calculation. After the device and method are implemented, mixture bin sticking and starting and the shutdown top and tail number are obviously reduced, the sintering product tact is stabilized to the maximum degree, generation of sintering waste materials caused by unstable water adding is avoided, and stable running of the sintering production is ensured.

Description

technical field [0001] The invention relates to a method for automatically adding water to a sintering mixture, and belongs to the technical field of equipment and methods for adding water to a sintering mixture. Background technique [0002] At present, the moisture control of sintering mixture in most iron and steel plants in my country mostly adopts on-site manual water adding technology. The water adding system consists of three parts: primary mixer water adding system, secondary mixer water adding system and some auxiliary equipment. Each system is composed of an electric regulating valve, an electromagnetic flowmeter, and an infrared water measuring device is installed at the outlet of the primary and secondary mixers to detect the moisture value. The process of adding water is to determine the amount of water to be added by looking at the experience of the workers in the water post and on-site observation of the degree of dryness and wetness of the mixture at the outl...

AI Technical Summary

Problems solved by technology

[0003] The infrared moisture meter in the existing system is easily affected by the mineral color and wet solubility of the fired material. For example, the iron mixture is affected by the structure of the raw material, and there are many mineral color spectrums, which will affect the accuracy of the reference wavelength collection of the infrared analyzer. In addition, due to the change of day and night light and the change of water vapor density on site, the intensity of infrared reflected light changes, and the change of infrared reflected light intensity causes the change of the measured value of the moisture content of the mixture, thus affecting the measurement accuracy.

[0004] The current on-site manual water adding technology can only roughly calculate and set the amount of water added manually. Due to the influence of factors such as the difference in water content of the material and the fluctuation of the total feeding amount, the water content cannot be accurately calculated, and the fluctuation cannot be eliminated, resulting in relatively large fluctuations in the moisture content of the mixture. Big

If the moisture content of the mixture is too high or too low, the granulation effect of the mixture will be deteriorated, the air permeability of the sintered mixture will be deteriorated, the sintering process will be deteriorated, the sintering yield will be reduced, and the return of ore will be increased. What is more serious is Mistakes in manual water pumping caused the water in the mixture to be too dry and too wet, which seriously deteriorated the sintering process, and the sintering end point could not be controlled, resulting in vicious accidents such as secondary combustion and agglomeration of sinter on the ring cooler or freezing of wet materials on the ring cooler in winter

[0005] In addition, when the sintering machine is turned on and off, the moisture in the head and tail of the mixture is not easy to control, and the process requirements should be controlled according to the principle of dryness, so as to prevent the accident of sticking and hanging materials in the buffer bin.

However, the water content of the mixed material is too dry. During the material storage process in the buffer bin after starting up, the fan-shaped valve of the round roller is not evenly discharged, and the sintering head and tailings will be formed due to poor material distribution. These sintering ores will affect the quality of the overall sintering ore. Form a certain impact, seriously affect the indicators of sinter

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