Search

CN-121981593-A - Method for improving thermal performance of metallurgical coke

CN121981593ACN 121981593 ACN121981593 ACN 121981593ACN-121981593-A

Abstract

The invention discloses a method for improving thermal performance of metallurgical coke, which adopts a full-flow technical scheme for improving thermal performance of metallurgical coke by systematic thinking, synergistic thinking and linkage thinking, and is capable of improving coke quality essentially, scientifically and effectively improving thermal performance of metallurgical coke on the premise of stably controlling cost, thereby expanding coking coal resources, saving and protecting high-quality coking coal, optimizing coal blending technical structure, reducing coking coal blending cost, playing a positive pushing role on stable and efficient production of a blast furnace, and generating great economic benefit and good social benefit. Solves the technical problems of insignificant effect of improving the thermal performance of metallurgical coke, rapid increase of coal blending cost and unsmooth production of blast furnaces.

Inventors

  • JIANG XIN

Assignees

  • 内蒙古包钢钢联股份有限公司

Dates

Publication Date
20260505
Application Date
20251229

Claims (9)

  1. 1. A method for improving the thermal properties of metallurgical coke comprising: Step 1, determining systematic thinking, and implementing systematic methods and steps; Step2, clear cooperative work and linkage cooperation Step 3, dialyzing the action mechanism of coal blending and coking, and essentially improving the thermal state performance of metallurgical coke by structural thinking from the principle; The basic principle of coking and coal blending is that a colloid body with gas, solid and liquid phases coexisting in the coal pyrolysis process has cohesiveness and can be adhered with surrounding solid coal particles to be adhered together to form the colloid body; the coking process of coking coal is the action between active substances and inert substances, the coke strength is related to the form and content of the active substances and also related to the form and content of the inert substances, the interval between the conversion temperature ranges of the colloid bodies which are coexistent with gas, solid and liquid in the pyrolysis process of each single coal of the coking raw materials can be mutually overlapped, and the time of the plastic range of the coal in the pyrolysis process is prolonged; Step 4, detecting, analyzing and researching the properties and performances of various single coals used for coking and blending, and mainly analyzing and researching the performance indexes of the coking single coals influencing the thermal state performance of metallurgical coke; The property indexes of each single coal used for coking and blending coal at least comprise, but are not limited to ash content, sulfur content, volatile matters, bonding index G, maximum thickness Y of a colloid body, strength CSR after reaction, ash component catalytic index MIC, gibbs maximum fluidity alpha max, lithology standard deviation SR and Ocima expansion degree b; step 5, preliminarily determining a coking and coal blending technical scheme; Step 6, verifying a coal blending ratio test coke oven and analyzing and researching the performance and quality of test coke; step 7, verifying and testing coke performance quality analysis and research optimization coal blending technical scheme according to a coal blending ratio test coke oven; step 8, verifying an optimized coal blending ratio test coke oven and analyzing and researching the performance and quality of test coke; step 9, optimizing the semi-industrial test technical research of the coal blending technical scheme; Step 10, analyzing and researching the performance and quality of semi-industrial test coke; step 11, determining a scientific and economic optimized coal blending technical scheme according to analysis and research of the performance quality of semi-industrial test coke; Step 12, optimizing the industrial production of the coal blending technical scheme; The metallurgical coke produced in the industrialized production exhibits comprehensive quality detection and analysis, and indexes of detection and analysis at least comprise ash, sulfur content, moisture, thermal performance CRI, CSR, crushing strength M40, wear resistance M10, porosity, pore wall thickness and metallurgical coke ash components; Step 13, optimizing a temperature system, a coking time system and a pressure system and strictly executing operation rules of four systems in a coke oven production system; step 14, quenching mode and standardized operation thereof; Step 15, implementation of external intervention measures and means; The use of boron-based or titanium-based passivating agents in the coke quenching process for improving the thermal performance of metallurgical coke; step 16, verifying the using effect of the metallurgical coke blast furnace; and 17, curing the result experience, summarizing the experience, and curing the result.
  2. 2. The method for improving the thermal performance of metallurgical coke according to claim 1, wherein in the step 6, the coal blending ratio verification test is performed on the metallurgical coke to be smelted by performing comprehensive quality detection analysis, and indexes of detection analysis at least comprise ash, sulfur content, moisture, thermal performance CRI, CSR, crushing strength M40, wear resistance M10, porosity and pore wall thickness.
  3. 3. The method for improving the thermal properties of metallurgical coke according to claim 2, wherein the technical parameters and the correlation thereof of the test coke which influence the thermal properties of the metallurgical coke are determined in a mass analysis.
  4. 4. The method for improving the thermal performance of metallurgical coke according to claim 3, wherein the technical parameters of the test coke subjected to the key analysis mainly comprise thermal performance CRI, CSR, crushing strength M40, wear resistance M10, porosity, pore wall thickness and coke ash composition.
  5. 5. The method for improving thermal performance of metallurgical coke according to claim 1, wherein in step 16, the effect of improving thermal performance of metallurgical coke is verified by determining the effect of using the blast furnace, the effect of improving thermal performance of metallurgical coke is comprehensively calculated and evaluated, the quality requirement and cost control of metallurgical coke are determined, and the quality performance index and cost control requirement of metallurgical coke are determined according to the quality requirement and cost control requirement of metallurgical coke.
  6. 6. The method for improving thermal properties of metallurgical coke according to claim 5, wherein the verification of the effect of the blast furnace is focused on the yield of the blast furnace, the utilization coefficient of the blast furnace and the fuel ratio of the blast furnace.
  7. 7. The method for improving thermal performance of metallurgical coke according to claim 1, wherein the determination of the blending solution in both step 7 and step 11 is performed by detecting and analyzing the properties of the optimized blending solution and the optimized blending solution, including, but not limited to, ash, sulfur, volatile matter, bond index G, maximum thickness of colloid Y, post-reaction strength CSR, ash component catalytic index MIC, gibbs maximum fluidity αmax, lithofacies standard deviation SR, and Ownian expansion b.
  8. 8. The method for improving the thermal performance of metallurgical coke according to claim 1, wherein the coal blending ratio verification test and the semi-industrialization test in the step 8 and the step 10 are performed with comprehensive quality detection analysis on the metallurgical coke, and the indexes of the detection analysis at least comprise ash content, sulfur content, moisture content, thermal performance CRI, CSR, crushing strength M40, wear resistance M10, porosity, pore wall thickness and metallurgical coke ash component.
  9. 9. The method for improving the thermal performance of metallurgical coke according to claim 1, wherein the reasons and measures for improving the thermal performance of metallurgical coke are analyzed in the preliminary scheme, the optimized coal blending technical scheme and the optimized coal blending technical scheme.

Description

Method for improving thermal performance of metallurgical coke Technical Field The invention belongs to the technical field of detection, and particularly relates to a method for improving thermal performance of metallurgical coke. Background The metallurgical coke is a core raw material for steel production of national economy supporting basic industry, is a heat source, a reducing agent, a material column framework and a penetrating agent for blast furnace smelting production, is the most important regulating means in the blast furnace production process, has irreplaceability, and plays an important role in guaranteeing and supporting the development of the steel industry. In recent years, along with the development and progress of blast furnace smelting technology, particularly the rapid development of large-scale blast furnace volume, high-wind-temperature technology and blast oxygen-enriched coal injection technology, coke is taken as a framework of a material column in the blast furnace, so that the ventilation and liquid permeation effects in the blast furnace are more outstanding. The quality of coke, particularly the reactivity of the coke and the strength after reaction have great influence on the modern blast furnace smelting process, and become a key factor for limiting the stable, balanced, high-quality and high-efficiency production of molten iron of a blast furnace, and the knowledge of the importance of the coke and the parameter index of the coke in the iron making and coking industries depend on the unprecedented height. The main way to improve the thermal state performance of metallurgical coke is to add scarce and precious high-quality coking coal, fat coal and the like in the coking process of blending coal, so that the cost of coking and blending coal can be greatly increased, and the valuable non-renewable disposable coking coal source is greatly wasted. The coking coal variety in China has unreasonable structure, wherein the main coking coal resources such as fat coal, coking coal and the like have less reserves, and the structural contradiction is very prominent. Meanwhile, coking coal varieties are uneven in structure and uneven in regional distribution, and are mainly distributed in North China and south China coal-bearing strata. The improvement of the smelting strength of the blast furnace and the objective requirement of economic benefit put forth higher demands on the thermal performance of metallurgical coke, but the thermal performance improving means under the conventional thinking generally adopts simple and high-quality fat coal and coking coal proportion increasing, but is not good for the current situation of coking resources in China with poor high-quality resources, and meanwhile, only the proportion of high-quality fat coal and coking coal with relatively high price is increased, the overall thinking solution of systematic, synergistic and linkage thinking is not realized, even the reaction mechanism of the thermal performance of the coke is not completely clarified, the effect is necessarily very small, the cost of coal blending is increased sharply, the blast furnace production is not smooth, and how the thermal performance of the metallurgical coke is improved through the combined synergistic effect of a plurality of means such as the coal blending coking mechanism, the coal blending structure optimization, the metallurgical coke production flow, the external intervention and the like. Disclosure of Invention In order to solve the technical problems, the invention aims to provide a method for improving the thermal state performance of metallurgical coke. The invention relates to a method for improving the thermal state performance of metallurgical coke, which is characterized in that the core principle is determined by system thinking, cooperative linkage, mechanism is first, performance is based, production guarantee condition is the basis, external intervention is auxiliary, and blast furnace verification is core; The invention relates to a method for improving the thermal state performance of metallurgical coke, which is characterized in that the improvement of the thermal state performance of the metallurgical coke is definitely a systematic engineering, the systematic thinking is determined, and the systematic method and steps are implemented; the process of improving the thermal performance of the metallurgical coke needs cooperative combat and linkage coordination, and it is difficult for any party to ensure that the thermal performance of the metallurgical coke is effectively, economically and stably improved without effort; the method comprises the steps of firstly dialyzing the action mechanism of coal blending and coking, clearly and clearly clarifying the mechanism in the coal blending and coking process, structurally improving the thermal performance of the metallurgical coke by the structural thought, detecting and analyzing and researching the prope