High-proportion coal blending and coking method

Abstract

The invention relates to a high-proportion coal blending and coking method, wherein the coal blending varieties for coking used in the method comprises gas coal, fat coal, coking coal, lean coal and one third of coking coal. The coking method comprises the following steps: A. crushing raw coals separately, wherein crushed particle grade is less than 3mm, and the coal with particle size being lessthan 2mm accounts for more than 60% of the raw coal; and B. carrying out basic coal blending coking on the raw coals obtained in step A, wherein anhydrous ash-free basis volatile matter (Vdaf) of thebasic coal blending quality is 26.0-30.0%, the averagely maximum reflectance (MMR) of vitrinite is 1.0-1.1%, ash content (Ad) is less than 10.1%, total sulfur (St, d) is less than 1.1%, caking index (G) is more than 74, maximum thickness of a gelatine layer is more than 18mm and ratio between active components and inert components is 1.7-1.8. The coal blending coking method of the invention can enlarge coking coal source, lower ash content, sulfur content and phosphorus content in coke, reduce production cost of enterprises, increase economic benefit, improve competitiveness of enterprises, and achieve good comprehensive benefit.

Description

technical field [0001] The invention relates to a coking method, in particular to a high-ratio coal blending coking method. Background technique [0002] Coking is a traditional industry. As early as the middle of the 18th century, due to the progress of the industrial revolution, the demand for coke for ironmaking in Britain increased significantly, and coke ovens came into being. In 1763, a honeycomb coking oven that uses coal for coking was developed. It is a circular arched cavity made of refractory bricks, and the top and side walls are respectively opened with coal and air inlets. In 1925, China built the first coking plant in Shijiazhuang, which met the coking needs of Hanyeping Iron Works. In the next hundred years, China's coke oven coking chamber has developed rapidly from low to high, from top loading to tamping. At present, my country has the world's highest 7.63m top loading coke oven and 6.25m tamping coke oven, coke Production accounts for more than 60% of th...

AI Technical Summary

Problems solved by technology

However, the traditional coal blending coking method has many disadvantages, such as: resource shortage, high-quality coking coal resource shortage makes this method lack of continuous and stable coal blending ratio; coal blending cost is high, this method uses a large amount of high-quality coking coal, and the cost increases; Coke ash, sulfur, phosphorus and other indicators are difficult to effectively guarantee. Although high-quality coking coal resources have strong cohesiveness, but the content of ash, sulfur, phosphorus and other indicators is relatively high, it is difficult to guarantee the ash, sulfur and phosphorus of coke