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1977年开始投产的法布里卡矿选矿厂，用9台标准型DP317、气隙宽1．5mm的琼斯湿式强磁选机生产球团原料用的精矿。这些湿式强磁选机平行作业。给料速度为110t／h，原料中铁品位为47％。磁铁矿最大含量仅0．8％。磁场强度为1．2T。自1986年。该矿已使其生产设备适合于选别大量低品位的铁英岩，以最大限度地利用现有的铁矿资源。当磁选机给矿中磁铁矿含量增加到3％时，导致处理量降低。这是因为在高磁场强度时，磁选机分选腔部分堵塞。即使降低给矿速度和磁场强度。这个问题也不能解决。用型号DP90的琼斯磁选机，在中间工厂经过大量实验工作之后，利用现有的9台琼斯磁选机将工业用的湿式强磁选车间改变为两段工艺。第一段4台磁选机的气隙增加到3．5mm，相应的最大磁场强度为0．7T。在第一段“中磁场租磁选作业”之后。便是在原有位置上的5台磁选机的第二段“真正”强磁场湿式强磁选作业，磁选机气隙为1．5mm。最大磁场强度1T。给矿速度第一段可以达到320t／h，第二段达到24ot／h。可用新旧流程来描述法布里卡矿选厂的设计思想，介绍了中间工厂的实验工作的细节以及新车间磁选工段的实际运行数据。
The Fabrika beneficiation plant, which started production in 1977, uses nine standard DP317 Jones jets with a wide air gap of 1.5 mm to produce pellets for pellet raw materials. These wet magnetic separator parallel operation. Feeding speed of 110t / h, raw materials, iron grade was 47%. Magnetite maximum content of only 0.8%. Magnetic field strength of 1.2T. Since 1986. The mine has made its production facilities suitable for the selection of a large number of low-grade ferrihydrite in order to maximize the use of existing iron ore resources. When the magnetic separator to the mine magnetite content increased to 3%, resulting in reduced handling capacity. This is because the magnetic separator is partially clogged at high field strength. Even if to reduce the speed and magnetic field strength. This problem can not be solved either. With the Jones Magnetic Separator Model DP90, after extensive experimentation in the intermediate plant, the existing nine Jones magnetic separator was used to change the industrial wet-intensive magnetic separation plant to two-stage processes. The first paragraph 4 sets of magnetic separator air gap increased to 3.5mm, the corresponding maximum magnetic field strength of 0.7T. After the first paragraph of “magnetic field rent magnetic homework”. It is in the original position of the second paragraph of 5 magnetic separator “real” strong magnetic field wet magnetic separation operation, magnetic separator air gap of 1.5mm. The maximum magnetic field strength 1T. To the first paragraph of ore speed can reach 320t / h, the second paragraph reached 24ot / h. New and old processes can be used to describe Fabry’s ore dressing plant design ideas, the details of the experimental work in the intermediate plant and the actual operating data of the new workshop magnetic separation section.