Method of controlling coke quality with high proportion weakly caking coal

Abstract

The invention discloses a method for controlling the coke quality of high-proportion weakly coking coal. The method comprises the following steps: (1) measurement of gelatinous layer index; (2) matched coal granularity control; (3) industrial index control of matched coal; (4) coking process behavior index; and (5) coking coal microstructure index control. According to the method, the scientific and reasonable control method is provided for top-loaded coke oven of 6 meters or above for producing high-quality coke with low cost, the most key factors, namely coke microstructure coordination control and coking process behavior, influencing the coke quality are subjected to coordination control; in the top loaded coking process of a coke oven of 6 meters or above, when the matched coal has a coarse particle embedding structure which is more than 35%, the blending quantity of weakly coking coal is 30-40%; when the matched coal has a coarse particle embedding structure of more than30% and equal to or smaller than 35%, the blending quantity of the weakly coking coal is 20%-30%, the obtained coke has the characteristics that CSR is more than 66%, M40 is more than 86% and M10 is smaller than 6.2%, and can meet the requirement of large-size blast furnace of 3000m<3>.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a method for controlling the quality of coke with high proportion and weak caking coal. Background technique [0002] For quite a period of time in my country, blast furnace ironmaking is still the mainstream process, and the quality of coke is crucial to the large-scale blast furnace and the progress of ironmaking technology. In order to meet the smooth running and large-scale development of blast furnaces, the coking industry has formed a coal blending principle of high-quality coking coal with scarce resources, and the weak coking coal with nearly 50% of cheap resource reserves is rarely used, resulting in high coal blending costs. , which is seriously contrary to the status quo of resources. Therefore, under the premise of stable coke quality, increasing the use of weakly coking coking coal with low price, low ash and low sulfur resource reserves will help r...

AI Technical Summary

Problems solved by technology

In order to meet the smooth running and large-scale development of blast furnaces, the coking industry has formed a coal blending principle of high-quality coking coal with scarce resources, and the weak coking coal with nearly 50% of cheap resource reserves is rarely used, resulting in high coal blending costs. , which is seriously contrary to the status quo of resources

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