Study On A Adding Waste Polymer In Blend Coal Coking Technology

High-quality coking coal resources are relative lack in our country, and theenvironmental pollution of waste plastics, tires and other polymers is serious. For therational use of coking coal resources, blending structure must be adjusted to solve oralleviate the environment problem of waste polymers pollution. Use of existing coke andchemical recovery equipment, that waste plastics and tires after appropriate pretreatmentadded to the coal can effectively improve the softening of coal and bonding process ofmelting. High-quality coke can be refined, at the same time saving coking coal resourcesand reducing production costs.Industrial analysis index, caking index and petrographic analysis indicators of fat coal(Zhaogezhuang and Zhongliu), coking coal (Yangquan) and lean coal (Lu’an and San’gei),as well as the ash, sulfur and particle size distribution of thin rubber and thick rubber weremeasured. When the ratio of four abandoned polymer complexes in Yangquan coking coaland blending coal (Zhao Gezhuang: San’gei to7:3) was adjusted, the influence on cakingindex(such as G, Y, b, MF) was researched. Changing the proportion of thin rubber andpolyethylene, then they were added to blend coking coal through three ways, such asadditional, alternative system of lean coal and block briquette, and achieved crucible coke.Influence regularity on the quality of coke was researched. And the mechanism of itseffects on coke quality was described through three aspects, they were pore structure,apparent structure and crystalline structure.When polymer added to coking coal and blending coal, the impact trends of adhesionwere same. However, the proportion of different polymer types and differences impact onthe bond index significantly; Bond index with polyethylene and thin rubber added wasmore excellent than the values with polypropylene added. The addition of polyethylenewith the three different ways can respectively save four percent, five percent, five percentof the coking coal resources; Additional way was not suitable for the thin rubber, but whenthin rubber added through alternative system of lean coal or block briquette, coking coalresources both can be saved three percent. Coking with abandoned polymer complexesadded can effectively expand the coking coal resources and reduce production costs. Theyhave significant economic and environmental benefits, and provide a theoretical andexperimental basis for coking coal blending with waste polymer.