A method of distributing blast furnace material according to the particle size of the raw fuel into the furnace

Abstract

The invention relates to a method for blast furnace material distribution according to the furnace entering raw fuel particle diameter. Through the calculation on the mass of each batch of furnace entering ores, the total ring number of ore material distribution in each time, the mass of each bath of furnace entering coke, and the total ring number of the coke material distribution in each time, the method of determining how to perform blast furnace material distribution operation according to the self equipment of the blast furnace and the furnace entering raw fuel conditions in the daily production process of the blast furnace is realized. When the blast furnace daily material distribution operation is performed according to the method provided by the invention, the blast furnace raw fuel uses coke or ores; the most reasonable blast furnace material distribution of different furnace materials can be realized; the coal gas utilization rate is improved; the fuel consumption is reduced;the blast furnace conditions are stabilized; the effect of lowering the iron making production cost is further reached.

Description

technical field [0001] The invention belongs to the technical field of ironmaking, and in particular relates to a method for distributing materials for a blast furnace according to the particle size of the raw fuel fed into the furnace. Background technique [0002] For metallurgical enterprises, ironmaking consumption accounts for about 70% of the entire technological process. Therefore, reducing ironmaking process costs, especially reducing fuel consumption, is of great significance to enterprises. As we all know, there are two key factors that determine the cost of the blast furnace process, the conditions of the raw materials and fuels into the furnace and the operation system of the smelting process. In order to reduce the daily production cost, it is necessary to start from the optimization and improvement of the daily operation of the blast furnace. [0003] As one of the important adjustment means of the blast furnace, the upper furnace top material distribution sys...

AI Technical Summary

Problems solved by technology

[0004] Regarding the blast furnace material distribution process system, although there are many concerns at home and abroad, most of these are achieved by improving the design of the chute or starting from the ore-coke ratio in the material distribution process, or from the reasonable furnace top material surface. Starting from the shape of the charge, there are few discussions on the influence of the particle size of the charge on the distribution of the blast furnace, and the technical elaboration on the relationship between the distribution system and the particle size of the charge is even rarer.

For example, many patents start from the improvement of material distribution equipment, and optimize the design of the chute to achieve a reasonable drop point of the charge, such as: the Chinese patent "Blast Furnace Top Distributor without Bell" Publication No. CN102827975A; the patent "Blast Furnace Top Distribution Device" publication No. CN101701271A, Patent "Blast Furnace Bellless Distributor" Publication No. CN101173320A, these technologies are all through optimizing the material or design of the existing bellless distributor to achieve the purpose of simplifying the process, flexible distributing and convenient maintenance, and It has also achieved certain results in practical applications, but none of these inventions mentioned the relationship between the charging device and the charging material. Therefore, it is still debatable whether the best charging effect can be achieved for different charging conditions. place

Another thing is to improve the way of distributing materials, such as increasing the amount of sintered ore with small particle size, combining multi-ring distributing with coke in the center, or adjusting the order of adding ore and coke, or forming unique materials such as funnel-shaped surface and center steamed buns. Blast furnace material surface and other methods to achieve optimized distribution of blast furnace, such as: Chinese patent "Blast furnace charge distribution method" publication number CN104152614A, patent "Blast furnace funnel-shaped material surface distribution method" publication number CN105112590A, patent "Blast furnace chute multi-ring distribution method" Publication No. CN101250602A, Patent "Blast Furnace Bellless Roof Multi-ring Matrix Distribution Method" Publication No. CN101845528A, Patent "Blast Furnace Distribution Method" Publication No. CN102994670A. These technologies achieve reasonable distribution by optimizing the order of distribution and improving the shape of the material surface. purpose, it has a certain effect in actual production, but this type of invention is also able to take into account the relationship between the distribution device and the charge, so in actual use, it is still possible to achieve the best utilization effect.

Or further inventions and creations aimed at the types of charge, such as: Chinese patent "Bellless Blast Furnace High-Proportion Pellet Furnace Charge Structure Distribution Method" Publication No. CN102021255A, patent "Bellless Furnace Top Blast Furnace Using High Zinc Content Raw Materials Distributing Method for Blast Furnace Gas" Publication No. CN102010922A, Patent "A Distributing Method for Blast Furnace Pellets" Publication No. CN104789720A, "A Distributing Method for Improving Blast Furnace Gas Utilization" Publication No. CN104928420A, using coke, pellets, high-grade lump ore and Due to the different rolling characteristics of sinter ores, the material distribution is carried out separately, so as to stabilize the upper air flow of the blast furnace, improve the utilization rate of blast furnace gas, and reduce the cost of pig iron. This kind of technology also has certain practical significance for the distribution of blast furnace materials. There is a large difference, only starting from the type of charge, in order to fundamentally solve the problem of the suitable drop point of the charge, therefore, in practical applications, there is still a large difference in achieving the best effect of the charge.

There are also some literatures that can be consulted at home and abroad, such as: "Journal of Iron and Steel Research", "Influence of Parameters of Combined Tank Type Bellless Material Distribution Equipment on the Material Drop Point", 2010, Volume 22, Issue 7, 21; ""Development of Mathematical Model of Multi-ring Distribution on Bellless Furnace Top", 2008, Vol. 43, No. 12, No. 20; "Steel" "Exploration and Practice of the Law of Blast Furnace Bellless Top Furnace Distribution", 2006, Vol. 41, No. 5 , 7, etc. These documents mention the optimization of the distribution method and the establishment of the corresponding mathematical model, which has certain reference significance for the establishment of a reasonable distribution system and the improvement of the gas utilization rate of the blast furnace. However, it must also be pointed out that such documents None of them discussed the relationship between the charging device and the charge, nor did it mention the correlation between the particle size of the charge and the blast furnace charge, so there are certain limitations in the adjustment of the blast furnace charge distribution system

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