Method for calculating reactivity and post-reaction strength of alkali-rich coke in high-titanium blast furnace

Abstract

The invention discloses a method for calculating reactivity and post-reaction strength of alkali-rich coke in a high-titanium blast furnace, and belongs to the technical field of metallurgical production processes. According to the calculation method, the reactivity and the post-reaction strength of the alkali-rich coke in the blast furnace can be rapidly calculated, and the performance indexes of the coke in the blast furnace can be simply and efficiently judged. The calculation method comprises the following steps: firstly, measuring coke reactivity CRI and post-reaction strength CSR of the alkali-rich coke by taking the prepared alkali-rich coke as a sample through an actual test, defining a relationship between alkali metal concentration and coke performance in a target blast furnace through regression analysis in combination with alkali metal concentration obtained in an alkali-rich coke preparation process to obtain a formula 1 of CRI = f (CK, CNa) and a formula 2 of CSR = f (CK, CNa), and then collecting the current potassium income, sodium income, molten iron daily output and coke daily consumption of a target blast furnace, calculating the steam concentrations CK and CNa of alkali metals K and Na formed in the blast furnace, and finally substituting the alkali metal concentration data CK and CNa into formulas 1 and 2 to calculate the reactivity CRI and post-reaction strength CSR of alkali-rich coke in the blast furnace.

Description

technical field [0001] The invention relates to a calculation method, in particular to a calculation method for the reactivity and post-reaction strength of alkali-rich coke in a high-titanium type blast furnace, and belongs to the technical field of metallurgical production technology. Background technique [0002] Blast furnace is currently the most efficient process equipment for iron oxide reduction and the main producer of raw materials for steelmaking process. If there is a problem in the production process, it will delay and affect the normal progress of the entire production process. The coke used in blast furnace ironmaking not only acts as a reducing agent and exothermic agent in the blast furnace, but also acts as the skeleton of the material column. In order to achieve better technical and economic indicators for blast furnace operation, coke for smelting, commonly known as metallurgical coke, must have appropriate chemical and physical properties, including ther...

AI Technical Summary

Problems solved by technology

However, due to the high temperature, high pressure, closed complex and harsh environment inside the blast furnace in the actual production process, it is difficult to monitor the metallurgical process in real time. Therefore, it is necessary to detect the quality change of the coke in the blast furnace after it is rich in alkali and take timely measures Making adjustments is crucial for the stable and direct operation of the blast furnace

However, there are few domestic and foreign studies on the quality change of coke after alkali enrichment in the blast furnace, and the practicability is poor.

At the same time, due to the existence of TiC, TiN, and Ti(C,N), the separation of slag and iron in high-titanium blast furnaces is more difficult than ordinary blast furnaces, and is more affected by abnormal furnace conditions. Currently, the quality of alkali-rich coke in high-titanium blast furnaces There are fewer calculation methods for changes, so developing a calculation method for the reactivity and post-reaction strength of alkali-rich coke in a high-titanium blast furnace has become a technical problem urgently to be solved by those skilled in the art

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