公开(公告)号：US3875504A

公开(公告)日：1975-04-01

申请号：US22708872

申请日：1972-02-17

Applicant: JOHNS MANVILLE

Inventor： BODYCOMB JR FREDERICK MERCER ,  BARNA JAMES JULIUS

IPC: G01N27/04 ,  G01R27/02 ,  G01R27/22

CPC classification number: G01N27/048 ,  G01R27/02 ,  G01R27/22

Abstract: The disclosure relates to a method for controlling the moisture content of ore exiting from a drier and an apparatus for effecting the measurement of the moisture content. A portion of the ore exiting from the drier is diverted onto a conveyor to form a moving ore bed sample. The moisture content of this sample is measured by an apparatus which comprises a conductivity meter provided with a pair of electrodes having convex surfaces in contact with the moving surface of the ore sample. The electrodes are maintained a fixed relative distance apart to insure a constant amount of ore therebetween and thus an accurate relative measurement of the moisture content for different positions of the ore bed as the ore passes by the electrodes. The measurements are converted to signals which actuate control apparatus to effect any necessary adjustments in the drying process to maintain the moisture content of the ore within specified limits.

Abstract translation: 本公开涉及一种用于控制从干燥器排出的矿石的含水量的方法和用于实现水分含量测量的装置。 从干燥器中排出的矿石的一部分被转移到输送机上以形成移动的矿床样品。 该样品的含水量通过一种装置测量，该装置包括一个电导率计，该电导率计设有一对具有与矿样的移动表面接触的凸面的电极。 电极保持相对固定的相对距离，以确保其间的恒定量的矿石，因此当矿石通过电极时矿床的不同位置的水分含量的精确相对测量。 这些测量被转换成信号，其致动控制装置以在干燥过程中进行任何必要的调整，以将矿石的含水量保持在规定的限度内。