A Method for Determination of Batch Weight in Blast Furnace Batch Distribution Process

Abstract

The invention relates to a method for determining the batch weight of materials in the blast furnace material distribution process. For the blast furnaces used in the ironmaking process of different metallurgical enterprises, the furnace capacity, furnace throat diameter, pig iron output, air volume, oxygen enrichment rate, and pressure difference are used as basic reference data. Determine the batch weight of the blast furnace, where the batch weight of the blast furnace ore adopts the formula OER BW =W+α×LR+β×LHZJ+δ×STCL+ε×FL+φ×FYL+η×YC is determined: the batch weight of blast furnace coke is determined by the formula COKE BW =Y+ρ×ORE BW Determination: The present invention determines the reasonable material batch weight of the blast furnace according to the furnace conditions of different blast furnaces in the daily smelting production process and with reference to a number of operating parameters; it can realize the implementation of the most reasonable material distribution system for the blast furnace, improve the gas utilization rate, and reduce fuel consumption. Ensure that the furnace condition is stable and smooth, so as to achieve the best smelting effect.

Description

technical field [0001] The invention relates to the technical field of blast furnace ironmaking, in particular to a method for determining batch weight in the blast furnace material distribution process. Background technique [0002] With the continuous development and progress of the times, the blast furnace, one of the core equipment of the smelting process, has also shown a trend of large-scale and automatic control compared with the past. More and more new equipment and optimized operation methods are used in the daily smelting of blast furnaces In the work, the blast furnace still occupies the most dominant position in ironmaking production. [0003] The blast furnace is operated on the basis of the classic principle of "lower part adjustment, combined with upper and lower part adjustment". Therefore, an appropriate adjustment system is of great significance to blast furnace production. In specific production practice, it is reflected in fuel consumption and daily outp...

AI Technical Summary

Problems solved by technology

For example, starting from the equipment aspect, by optimizing the distribution device, in order to achieve the most reasonable blast furnace distribution system (such as Chinese patent: "fork arm type bellless blast furnace distribution device", patent No. CN102363823A; "blast furnace top distribution device", patent No. CN101701271A; "Blast Furnace Bellless Distributor", Patent No. CN101173320; "A Blast Furnace Roof Distributor", Patent No.: CN102827976A, etc.), these inventions and creations, through the use of optimized distributor box, chute, chute suspension and other devices The design achieves the effects of flexible material distribution, high operation precision, reliable operation, convenient use and maintenance, and extended service life. However, this new technology only improves the equipment of the material distribution system, and does not mention the batch weight of the material during the blast furnace material distribution process. how to set

What's more, by optimizing and adjusting various operating techniques in the material distribution process, the optimization of the material distribution effect has been achieved (such as the Chinese patent "Blast Furnace Material Distribution Method", Patent No. CN102994670A; "Blast Furnace Chute Multi-ring Distribution Method", patent No. CN101250602; "Blast Furnace Bellless Furnace Roof Distribution Method", Patent No. CN101285108; "Blast Furnace Bellless Furnace Top Multi-Ring Matrix Distribution Center Coking Method", Patent No. CN101880739A, etc.), the above-mentioned inventions and creations have adopted the optimization of furnace charge drop point, to achieve Different methods such as precise control of the radial ore-coke ratio achieve the purpose of opening the center, stabilizing the edge, and activating the hearth, while also increasing the CO in the gas. 2 content, saving energy and reducing production costs, but it does not involve how to reasonably set the batch weight parameters of the charge

There are also (such as the Chinese patent "Blast Furnace Distributing Method for Improving Sinter Utilization Efficiency", Patent No. CN104131120A; "A Distributing Method for Blast Furnace Pellets", Patent No. CN1104789720A; "A Bellless Distributing Method for Blast Furnace Stability and Proceeding" , Patent No. CN103966373A; "A Distributing Method for Improving the Utilization Rate of Blast Furnace Gas", Patent No. CN104928420A, etc.), although the above-mentioned invention can obtain a stable burden drop and air flow distribution, improve the long-term stability of the blast furnace, and effectively improve the blast furnace gas Utilization rate reduces the cost of ironmaking, but similarly, it does not explain how to establish the batch weight

[0006] In some public documents at home and abroad, (such as the article "Shaogang No. 2 blast furnace batch heavy smelting test analysis" in the journal "Ironmaking", 2000, volume 19, issue 2, 32; Research on the batch weight characteristic number of the top material distribution operation", 2011, volume 46, issue 6, 13, etc.), all discuss the importance of the batch weight parameter in the blast furnace ironmaking production process, and also affect the volume of the batch tank, furnace The relationship between the throat diameter, the position of the material surface platform, the height of the furnace roof support structure, etc. These documents are all based on a single point of view, and fail to provide specific and appropriate batch weight parameters for different blast furnaces under different furnace conditions, that is, they fail to realize the establishment of the most reasonable upper material distribution system.