筛滤
1.A framework of parallel or latticed bars for blocking an opening.
2.The sieving-analysis method, a new way of pollen analysis, is designed to fit the study needs of loess pollen.
3.All reclaimed solids filtered through an approved screen or strainer before use.
4.Results showed that the best extracted design was: the baked green tea was sifted through a 0.45 mm sieve, the 3 g of sample tea were infused by 400 ml boiling deionized water, and extracted in boiling water bath for 30 min and then the extraction was sucked with suction pump and settled to the volume of 500 ml. The FAA contents were determined by the ninhydrin colorimetric method.
5.Some advanced techniques are adopted,such as :screening of raw material under bins, sintered ore mixed with coke nuts for charging,bell less BF top, long life BF shell with soft water closed recycling system and thin refractory lining, hot blast stove with double preheating,“OCP” slag granulation, pulverized coal injection system with high oxygen enrichment, BF gas turbine blower, Bishorf BFG cleaning system, power generation using the extra pressure of BFG, computer automatic control and so on.
