Laserfiche WebLink
cannot be performed after the material has been removed from the filter bays. <br /> They also should not be performed before the material enters the filter bays unless <br /> it is t00% guaranteed that no wash downs or any other process could add <br /> moisture after the tests are made earlier in the mill process. Tails pH will be tested <br /> using an Orion Star A321 portable meter and electrode at the same time the <br /> moisture reading is taken. Trial compaction tests at higher moisture levels can be <br /> performed on site and if these tests attain the 94%compaction required, a higher <br /> moisture will then be allowed and this document can be modified. <br /> b- If the material is within the limits described in Item a above, the material can be <br /> removed from the filter bays and placed in either the Revenue Pile or the Atlas <br /> Pile. <br /> c- Moisture tests should be performed at the frequency of 5 or more tests per 12 hour <br /> shift or once per too tons until such time as consistency warrants less frequent <br /> testing. If the average of these tests is within the moisture limit, the material in <br /> the filter bays is acceptable to be removed to the piles. If this average is above <br /> these limits, see Item d below. <br /> d- This item already assumes that a true maximum moisture limit has been found <br /> from trial compaction tests on site. If the material is not within these moisture <br /> limits, the following procedures will be followed: (1)if the material is within 1.5% <br /> of the moisture limit, and if known material of acceptable moisture exists on the <br /> piles and is available to mix with this slightly higher moisture material, then it <br /> can be removed and blended at the piles. The Troxler density tests will also record <br /> moisture to determine if the proper compaction can be achieved. (2) if the <br /> material is within 1.5% of the moisture limit, and the time of year may allow <br /> drying of the material on the surface of the pile area, the material can be loaded <br /> out from the filter bays and allowed to dry in the sun in a shallow lift. This should <br /> not be done with any large volume of material since there is such limited room on <br /> site and there is no guarantee that the material will dry out in the limited warm <br /> season. (3) if the material is more than 1.5%above the maximum moisture limit, <br /> it must be placed in the concreted apron area and the slurry pump must pump <br /> this material to either of two places: the thickener or the 18000 gallon tailings <br /> 3 <br />