The invention discloses a dry coke powder coke back blending coking coal method, which includes the red coke sent into the dry quenching furnace to get cold coke after being cooled by a circulating inert gas, and the circulating inert gas of the dry quenching furnace is returned to the dry quenching furnace to cool the red coke after one dust removal, the waste heat boiler and the two dedusting separation. The cold coke in the dry quenching furnace and the coking coal are sent to the coal coke batching bucket together with the coking coal together, and then the coal char mixture is sent into the coke wet coal rotary kiln through the batching bucket slots, and the coking coal and the coarser size of the powder coke are further broken through the friction and collision of the coke, and the mixing of the powder coke and the coking coal is realized. Then the coal and coke separation screen is sent to the coarse and fine materials, and the fine material is sent to coke oven for coke making to obtain the red coke and coarse material coke entering treatment system. The technology of the invention is simple, can effectively return the coke powder into the coking coal, simultaneously reclaims the waste heat of the powder coke to dry the coking coal effectively, and greatly reduces the emission of the smoke and dust, and is friendly to the environment.
【技术实现步骤摘要】
干熄焦粉焦回配炼焦煤方法
本专利技术涉及一种煤化工领域,具体的说是一种干熄焦粉焦回配炼焦煤方法。
技术介绍
粉焦是焦化生产过程中不可控制的副产品之一,其物化性能与大块焦炭大致相当,其量大,约占焦炭总量的10%。从目前市场情况看,<25mm的粉焦销路不畅,积压严重,污染环境。大量粉焦只能作低级燃料处理,一般用于烧结工序的燃料,或高炉喷吹煤等。如果将这些粉焦再掺混到煤料中炼焦,不仅解决了粉焦的销路问题。减少了环境污染,还可以节约大量瘦煤,达到能源的二次利用。据我国目前的煤炭资源来看,气煤储量相对丰富,且灰、硫含量。为了充分利用煤炭资源,在华东、华北、内蒙等地区宜采用捣固炼焦工艺。捣固炼焦工艺的配合煤中,气煤配人量高达60%一80%,在结焦过程中形成半焦后,热缩聚剧烈,收缩程度大,焦炭裂纹多,易碎。因此,在配合煤中添加适量的瘦化剂,可以减缓结焦过程的收缩速度,减少焦炭裂纹,提高焦炭强度。瘦化剂主要为瘦煤、半焦、细焦粉等含炭的惰性添加物。由于瘦煤储量急剧减少,成本较高且受到运输市场的限制。而延迟焦价格昂贵,市场供应量小,不易达到配比要求。所以配人适量的细焦粉替代部分瘦煤也为焦化厂提供了一条降本增效的途径。常规炼焦配合煤中,肥煤和气煤的配入量为50-60%,如果配合煤中添加适量的细焦粉可以改善焦炭质量。上海吴淞炼焦制气厂长期生产试验证明,在配煤比不变的情况下,将水分10%左右的焦粉细磨破碎至0.15mm再回配到炼焦煤中,M40提高2—3.5个百分点、M10降低2—3个百分点。生产铸造焦时掺入适量的细焦粉也能提高焦炭块度。武海燕等利用焦炭粉末加粘合剂制造气化用焦,完成 ...
【技术保护点】
一种干熄焦粉焦回配炼焦煤方法,包括将红焦送入干熄炉内被循环惰性气体冷却后得到冷焦,出干熄炉的循环惰性气体经一次除尘、余热锅炉和二除尘分离出粉焦后回送到干熄炉对红焦进行冷却,其特征在于,分离出的粉焦和出干熄炉的冷焦以及炼焦煤一起送往煤-焦配料斗内与炼焦煤初步混合,再通过配料斗溜槽将煤焦混合料送入焦炭‑湿煤回转窑中,通过焦块的摩擦、碰撞使炼焦煤和较粗粒径的粉焦进一步破碎,同时实现粉焦与炼焦煤的混合,再送入煤‑焦炭分离筛分离出粗料和细料,所述细料送入焦炉炼焦得到红焦,粗料进焦处理系统。
【技术特征摘要】
1.一种干熄焦粉焦回配炼焦煤方法,包括将红焦送入干熄炉内被循环惰性气体冷却后得到冷焦,出干熄炉的循环惰性气体经一次除尘、余热锅炉和二除尘分离出粉焦后回送到干熄炉对红焦进行冷却,其特征在于,分离出的粉焦和出干熄炉的冷焦以及炼焦煤一起送往煤-焦配料斗内与炼焦煤初步混合,再通过配料斗溜槽将煤焦混合料送入焦炭-湿煤回转窑中,通过焦块的摩擦、碰撞使炼焦煤和较粗粒径的粉焦进一步破碎,同时实现粉焦与炼焦煤的混合,再送入煤-焦炭分离筛分离出粗料和细料,所述细料送入焦炉炼焦得到红焦,粗料进焦处理系统。2.如权利要求1所述的干熄焦粉焦回配炼焦煤方法,其特征在于,所述炼焦煤在送往煤-焦配料斗前先进行粗破碎到40mm以下。3.如权利要求1所述的干熄焦粉焦回配炼焦煤方法,其特征在于,所述煤-焦炭分离筛分离出的粗料粒径>3mm,细料粒径≤3mm。4.如权利要求1所述的干熄焦粉...
【专利技术属性】
技术研发人员:吴高明,王元生,张雪红,
申请(专利权)人:武汉钢铁有限公司,
类型:发明
国别省市:湖北,42
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