188results about How to "Guaranteed Granularity" patented technology

The invention relates to a magnetic-gravity separation technology for Anshan type lean magnetite, which comprises the following steps: after adoption of a first-stage ball mill for ore grinding, a primary cyclone, a first-stage magnetic separator and a secondary cyclone for classification, settled sand is subjected to first-stage sieve screening, an screened product is fed into a spiral chute, concentrate in the spiral chute is fed into a gravity fine sieve, and a screened product by the gravity fine sieve is qualified concentrate; after overflow of the secondary cyclone and the edge tail of the spiral chute are merged, the concentrate is fed into a second-stage sieve after separation by a first-stage dehydration tank and a second-stage magnetic separator; products on the first-stage sieve, the second-stage sieve and the gravity fine sieve as well as mineral tailings in the spiral chute are merged and fed into a concentration magnetic separator, the mixture is fed into a second-stage ball mill for ore grinding after concentration, then the products return to the first-stage magnetic separator, and after separation by a second-stage dehydration tank and a third-stage magnetic separator, the screened product of the second-stage sieve is merged with the screened product of the gravity fine sieve into the final concentrate. The magnetic-gravity separation technology has the advantages that mineral processing technical indexes for the Anshan type lean magnetite are improved, the mineral processing efficiency is improved, and the production cost is reduced.

The invention relates to a simple magnetic separation process for Anshan type iron carbonate-containing lean magnetite ore. The process includes ore grinding, grading and magnetic separation and comprises the following concrete steps: ore grinding three times; presorting with a large-wrap angle medium-intensity magnet separator; grading with a cyclone three times; dehydration in three stages; fine sieving in two stages; and magnetic separation with a magnet separator in four stages. The invention provides the energy-saving, low-carbon, environment-friendly and reliable production process for treatment of iron carbonate-containing lean magnetite ore by using a simple magnetic separation method; the process can further improve treating capability, enhance technical and economic indexes, reduce production cost and greatly increase the utilization efficiency of inferior resources while improving ore grinding, grading and sorting efficiency.