In order to prove the function of the sieve bowl, the product flow is collected from the sieve bowl to treat lx0. 15mm units (16xl00 mesh) of clean coal from the spiral separator and non-desliming or foam products from the traditional flotation machine. As shown in Table 5, the proportion of ultra-fine solid feed in the foam of sieve-treated desliming bowl is small (8. 1 accounting for 25.6% and 25.6%). Therefore, only 65,438 00.7% of the total product is obtained by using desliming moisture foam, which is 65,438 06.2% of the non-desliming moisture foam. It is also worth noting that 88.8% of the total solids of non-desliming foam recovered by sieve bowl treatment were transported to the army, while 96.5% of the total solids recovered by sieve desliming bowl foam treatment. However, the loss of these two units is due to the fact that solids almost completely repel particles of -45 microns. For non-desliming foam, the sieve bowl only recovered 58.3% of ultrafine particles, while the recovery rate of coarse particles was almost perfect (je97- 99%). Similarly, the screen bowl restoration process requires that the feed contains -45μm solids (58.3%) and all 45μm particles for all practical purposes. The screen also includes 9.6 bowls of product quality, 7.2% ash, 7.9% to 6.6% desliming non-desliming foam and high ash rejected foam. The capacity of sieve bowl can further improve the inhibition of high humidity, and high ash micropowder makes sieve desliming bowl the overwhelming best choice for centrifugal dewatering feeding.
A case study was carried out to evaluate the influence of different desliming and flotation on the overall performance of the circuit structure. A series of studies have been carried out on the two.
Steam (practical) market is one of metallurgical (coking) markets.
Metallurgical coal market
Metallurgical coal is usually sold in the United States on the basis of receiving moisture, ash and sulfur. Therefore, in order to maximize crop yield, the demand for total moisture only meets the dry ash and sulfur content, and it is stipulated in the contract. Equipped with a hot dryer factory, the circuit with high recovery rate can keep the moisture content in the contract specifications. Unfortunately, thermal drying options are rarely feasible in new factories in the United States because they are very expensive to build and operate and it is difficult to obtain environmental reasons. Therefore, many operations find it difficult, if not impossible, to keep the contract requirements of low moisture, and at the same time maximize the recovery of the non-desliming loop in metallurgical flotation. This forced many operators to give up -0. 15 mm (100 mesh) solids in order to meet the contract moisture.