Method for blending coking coal by using fat coal with medium and high sulfur content
A coking coal and fat coal technology, applied in the field of metallurgical coke production, can solve the problems that cannot meet the coke quality requirements of large blast furnaces, cannot guarantee the continuous reflectance of vitrinite and coke quality decline, and achieve the protection of high-quality coking Coal resources, coke quality is good, and the effect of reducing coking cost
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Embodiment 1
[0023] (1) The components and weight percentages of coking coal are:
[0024] 1 / 3 coking coal: 14%; medium and high sulfur fat coal: 12%; other fat coal: 15%; caking index G≥78 coking coal 1 # : 10%; caking index G≥78 coking coal 2 # : 8%; caking index 75≤G<78 coking coal: 30%; lean coal: 11%.
[0025] (2) Coal quality indicators of medium and high-sulfur rich coal: average maximum reflectance of vitrinite: 1.195%; volatile matter: 28.44%; process performance indicators: cohesion index G value 92.2, colloidal layer thickness Y value 25.4mm , S td : 2.33%.
[0026] (3) Coal quality index of coking coal: caking index G value: 81.2; colloid layer thickness Y value: 15.5mm; S td : 1.03%.
[0027] (4) The quality of coke made in a coke oven above 6 meters: coke crushing strength M 40 : 88.73%; coke strength CSR after reaction: 62.00%; coke S td : 0.78%.
Embodiment 2
[0029] (1) Coking coal composition and weight percentage:
[0030] 1 / 3 coking coal: 17%; medium and high sulfur fat coal: 16%; other fat coal: 10%; caking index G≥78 coking coal 1 # : 10%; caking index G≥78 coking coal 2 # : 10%; caking index 75≤G# : 10%; caking index 75≤G# : 10%; lean coal: 17%.
[0031] (2) Coal quality indicators of medium and high-sulfur rich coal: average maximum reflectance of vitrinite: 1.167%; volatile matter: 28.36%; process performance indicators: cohesion index G value 91.0, colloidal layer thickness Y value 21.0mm , S td : 2.60%.
[0032] (3) Coal quality index of coking coal: caking index G value: 84.2; colloid layer thickness Y value: 16.9mm; S td : 0.86%.
[0033] (4) The quality of coke made in a coke oven above 6 meters: coke crushing strength M 40 : 89.06%; coke strength CSR after reaction: 66.92%; coke S td : 0.83%.
Embodiment 3
[0035] (1) Coking coal composition and weight percentage:
[0036] 1 / 3 coking coal: 10%; medium and high sulfur fat coal: 18%; other fat coal: 8%; caking index G≥78 coking coal: 30%; caking index 75≤G# : 14%; caking index 75≤G# : 10%; lean coal: 10%.
[0037] (2) Coal quality indicators of medium and high-sulfur rich coal: average maximum reflectance of vitrinite: 1.024%; volatile matter: 31.48%; process performance indicators: cohesive index G value 90.5, colloidal layer thickness Y value 21.0mm , S td : 1.67%.
[0038] (3) Coal quality index of coking coal: caking index G value: 80.4; colloid layer thickness Y value: 17.8mm; S td : 0.78%.
[0039] (4) The quality of coke made in a coke oven above 6 meters: coke crushing strength M 40 : 88.76%; coke strength CSR after reaction: 63.38%; coke S td : 0.66%.
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