公开(公告)号：US3865541A

公开(公告)日：1975-02-11

申请号：US40831873

申请日：1973-10-23

Applicant: TENNECO OIL CO

Inventor： WILSON DAVID ,  BURWELL BLAIR T

IPC: B01J6/00 ,  F27B7/00 ,  F27B7/16 ,  F27B7/20 ,  F27B7/14

CPC classification number: C01B35/10 ,  B01J6/002 ,  C01B35/06 ,  C01B35/12 ,  F27B7/00 ,  F27B7/162 ,  F27B7/2016 ,  F27B2007/2008

Abstract: In the method, a hot gas is flowed linearly through a slightly inclined treating area. Colemanite ore particles are repeatedly elevated and dropped substantially vertically through the gas while they are simultaneously advanced countercurrent to the gas flow. This movement is continued until the ore particles are heated to the point of decrepitation at which they relatively suddenly break into a large number of relatively fine particles of substantially sure colemanite which are carried out of the treating area by the gas stream. The gas carried colemanite particles are then separated from the gas stream to provide an upgraded and classified product. Gas velocity and temperature and the path and rate of movement of the ore through the gas are varied as required to obtain a given grade or size in the recovered colemanite product. The apparatus used in practicing the method includes, in a preferred form, a tubular calcining drum which is inclined slightly with respect to the horizontal. Lifters are positioned along the internal wall of the calcining drum and the drum is rotated between two stationary end assemblies. Ore particles are introduced into the upper end of the drum and a stream of hot gas is introduced through the lower end of the drum. Rotation of the drum causes the ore to be repeatedly lifted and dropped across the gas stream while the ore simultaneously advances from the upper toward the lower end of the drum. The temperature of the advancing ore increases to the point required to cause decrepitation of the ore, and the gas stream flowing through the drum carries the particles of decrepitation to the upper end of the drum where they are removed and separated from the gas stream. In the preferred form, gas leaving the drum is conveyed to a second rotating, inclined drum which functions as a preheater for ore being introduced into the calcining drum.

Abstract translation: 在该方法中，热气体直线地流过稍微倾斜的处理区域。 钴黑矿石颗粒被重复地升高并基本垂直地流过气体，同时它们与气流逆流地同时进行。 这一运动继续进行，直到矿石颗粒被加热到爆炸点，在这一点，它们相对突然地分解成大量由气流从处理区域进行的基本上可靠的煤灰岩的相对细小的颗粒。 然后将携带的煤烟气颗粒与气流分离，以提供升级和分类的产品。 气体速度和温度以及矿石通过气体的运动路径和速率根据需要而变化，以在回收的煤le石产品中获得给定的等级或尺寸。