公开(公告)号：US4762526A

公开(公告)日：1988-08-09

申请号：US900574

申请日：1986-08-26

申请人： Taiichi Funaji ,  Haruo Iso ,  Jisaku Tanimichi ,  Kenichi Nagata ,  Toshiaki Murata ,  Hideto Mitsui

发明人： Taiichi Funaji ,  Haruo Iso ,  Jisaku Tanimichi ,  Kenichi Nagata ,  Toshiaki Murata ,  Hideto Mitsui

IPC分类号： C10L5/14 ,  B03B9/00 ,  B03D1/02 ,  C10L5/16 ,  C10L9/00 ,  C10L9/10

CPC分类号： B03B9/005 ,  B03D1/02

摘要： Disclosed is a process for deashing coal, which comprises the following steps (a) to (e):(a) crushing coal to form crushed coal having a particle size distribution of 0.05 to 15 mm and an average particle size of 0.5 to 2 mm,(b) producing an aqueous slurry comprising the crushed coal, 1 to 4 wt. % of a binder based on the crushed coal, and water,(c) feeding the aqueous slurry of the crushed coal to a cylindrical agglomerator provided with disk impellers in a multistage manner and effecting collision and agglomeration among the crushed coal particles by the rotation of the impellers and effecting tumbling and agglomeration of the agglomerate to produce an aqueous slurry of spherical or spheroidal hard agglomerated coal,(d) separating the aqueous slurry of the agglomerated coal by treating with a solid-liquid separator into first agglomerated coal on the separating medium and an aqueous slurry of second agglomerated coal and ash which have passed through the separation medium, and(e) adding a frother or a frother-based flotation reagent to the aqueous slurry of the second agglomerated coal and the ash and recovering the second agglomerated coal by flotation.

摘要翻译： 公开了一种除煤的方法，其包括以下步骤（a）至（e）：（a）粉碎煤以形成粒度分布为0.05至15mm，平均粒径为0.5至2mm的粉碎煤 ，（b）制备包含粉碎煤的含水浆料，1〜4重量％ 基于粉碎煤的粘合剂的％和水，（c）将碎煤的水浆料以多级方式供给到设置有盘式叶轮的圆柱形附聚器，并且通过旋转来实现碎煤颗粒之间的碰撞和附聚 叶轮和附聚物的翻转和凝结，产生球形或球形硬团聚煤的水性浆液，（d）通过用固液分离器处理分离出附聚煤的含水浆料至分离介质上的第一附聚煤 和通过分离介质的第二附聚煤和灰分的含水浆料，和（e）向第二附聚煤和灰分的含水浆料中加入起泡沫或起泡沫浮选试剂，并回收第二附聚煤 通过浮动。