The article considers a mathematical model of the combustion zone of a blast furnace working with the use of the injection of coal-dust fuel. In this model, two subsystems were identified: (1) subsystem of heating the particles of coal dust and volatiles released in the combustion zone; (2) subsystem of heat exchange and combustion processes in the tuyere. A two-dimensional velocity field of gas in the combustion zone was investigated. The combustion processes are considered as a set of simultaneously developing phenomena of coke burning in a layer, single pieces of coke and particles of coal dust. The model includes the following equations: total gas mass balance, gas component mass balance, gas heat balance, movement of coal dust particles, and heat balance of coal dust particles. The model calculates maximum burning temperature in the combustion zone, the distance from the cut of the tuyere to the focus of combustion, the length of the oxygen combustion zone, gas temperature, the content of gas phase components, and the degree of carbon burnout of pulverized coal at the outlet of the tuyere combustion zone. An information-modeling system has been developed. It allows for the investigation of the influence of combined blast characteristics, the properties of coke and coal-dust fuel, the geometric dimensions of tuyeres, and other factors on the temperature fields and concentrations of components of the gas phase in the combustion zone. The model also helps to select a rational mode of pulverized coal that will ensure completeness of its combustion in the tuyere combustion zone. The main functions of the program are as follows: representation of results of calculation in form of tables and diagrams, storage of options of basic data in a database, and export of results of calculation to Microsoft Excel. Conclusions were made on the reduction of the combustion temperature in the combustion zone and the approach of the focus of combustion to the tuyere when pulverized coal was injected. The authors also have established the need to use coals with certain quality characteristics and place where coal dust was introduced into the blast stream.

中文翻译：

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高炉风口煤粉燃料喷射信息建模系统的研制

本文考虑了使用煤粉燃料喷射工作的高炉燃烧区的数学模型。在该模型中，确定了两个子系统：（1）加热燃烧区释放的煤尘和挥发物颗粒的子系统；(2) 风口换热和燃烧过程子系统。研究了燃烧区气体的二维速度场。燃烧过程被认为是一组同时发生的焦炭燃烧层、单块焦炭和煤尘颗粒的现象。该模型包括以下方程：总气体质量平衡、气体组分质量平衡、气体热平衡、煤尘颗粒的运动和煤尘颗粒的热平衡。该模型计算燃烧区的最高燃烧温度、风口切口到燃烧焦点的距离、氧气燃烧区的长度、气体温度、气相组分的含量以及碳的燃尽程度。风口燃烧区出口处的煤粉。已经开发了一个信息建模系统。它允许研究组合鼓风特性、焦炭和煤粉燃料的特性、风口的几何尺寸以及其他因素对温度场和燃烧区气相组分浓度的影响。该模型还有助于选择合理的煤粉模式，以确保其在风口燃烧区燃烧的完全性。该程序的主要功能如下：以表格和图表的形式表示计算结果，将基本数据选项存储在数据库中，以及将计算结果导出到 Microsoft Excel。对煤粉喷入时燃烧区燃烧温度的降低和燃烧焦点向风口的逼近进行了总结。作者还确定需要使用具有特定质量特征的煤以及将煤尘引入鼓风气流的位置。对煤粉喷入时燃烧区燃烧温度的降低和燃烧焦点靠近风口的问题进行了总结。作者还确定需要使用具有特定质量特征的煤以及将煤尘引入鼓风气流的位置。对煤粉喷入时燃烧区燃烧温度的降低和燃烧焦点向风口的逼近进行了总结。作者还确定需要使用具有特定质量特征的煤以及将煤尘引入鼓风气流的位置。