Wireless Monitoring Of Heat Flux Intensity Of Blast Furnace Cooling Stave And Analysis Of Furnace Bottom Erosion

Blast furnace longevity is an important issue in the field of iron-making,while the erosion status of hearth and bottom is the key factor to limit the life of the blast furnace.The research of the hearth and bottom erosion is of great significance to the longevity of the blast furnace.In the process of blast furnace production,cooling wall heat flux directly reflects the erosion status of bottom and hearth,and the temperature difference between the inlet and outlet of the cooling tower is an important parameter to calculate the heat flux.This article uses SimpliciTi network protocol to design a wireless monitoring system of the water temperature difference and heat flux in blast furnace cooling wall based on micro controller of CC1110 for the erosion analysis of hearth and bottom.The design of water temperature difference and thermal load wireless monitoring system should consider three core issues: First,high-precision,field data show heat flux data changes at least 35W/m2 and erosion error of about 7mm if the cooling wall temperature changes 0.02?,Therefore,high-precision temperature measurement for the safe production of blast furnace is essential.Second,low power,wireless temperature measurement instrument is supplied power by lithium cell,it's not easy to replace the battery instrument because of the bad environment in blast furnace site,therefore,the system hardware and software design must be based on the principle of energy-saving,as far as possible to extend the battery life.Third,reliability,there is not only and high temperature but also dust,gas,baffle and a variety of strong electromagnetic interference,therefore,we must ensure timely and accurate data transmission.The cooling wall heat flux is a condition for analyzing the erosion status of the hearth and bottom,which cannot completely reflect the erosion profile of hearth and bottom.Based on the theory of thermodynamic analysis,a two-dimensional erosion model of the hearth of the hearth is established based on the finite element method to analyze erosion status of hearth and bottom by using the heat flux and the thermocouple heat flow in the lining.Analysis result shows that heat flux in blast furnace cooling wall can analyze the extent of average erosion in a range of height.With the development of blast furnace longevity technology,the lining of hearth and bottom is more and more inclined to overall and uniform erosion.Therefore,in the case of thermocouple damage and can't be replaced in time,the design method by combining heat flux in blast furnace cooling wall and heat flow of thermocouple can be a more comprehensive reflection of erosion situation of the hearth and bottom.