41results about How to "Broad research prospects" patented technology

The present invention is one kind of type-D cast iron containing Pb, As and Sn and with raised performance. The present invention is superior to available technology, in which Pb, As and Sn are harmful to the performance of cast iron. The type-D cast iron of the present invention contains: C 3.9-4.5 (in weight portions, the same below), Si 1.2-1.6, Mn 0.6-0.95, P not more than 0.07, S not more than 0.04, Pb 0.005-0.009, As 0.03-0.08, Sn 0.1-0.4, Al 0.01-0.02 and Ti 0.04-0.09, except Fe. The type-D cast iron of the present invention as one new low cost engineering material has very high strength performance and excellent antioxidant performance, and may be used in high strength parts, such as crank shaft and cam shaft in refrigerator and compressor, heat resisting parts, such as glass mold, and heat resisting and wear resisting casting, such as roller.

The invention discloses a method for leaching lithium form coal ash. The method includes the steps of 1), a sintering process, namely weighing the coal ash, sodium carbonate and calcium carbonate in the mass ratio of 1:0:1-1:0:0.8:1, performing even mixing in a corundum crucible, placing the mixture in a muffle furnace for roasting for 60-100 minutes at the temperature ranging from 1000DEG C to 1200DEG C, cooling to indoor temperature and grinding the mixture to 200 mesh with a ball grinding mill; 2), a leaching process, namely evenly mixing a well-ground clinker with a sodium carbonate solution 3-8% in concentration in the solid-to-liquid ratio of 1:15-1:25 prior to transferring to a colloid grinder, subjecting the mixture to mechanical grinding for 30 minutes prior to transferring to a high-pressure kettle, cooling mixed liquid in the high-pressure kettle after high-pressure cooking for 20-60 minutes at the temperature ranging from 100DEG C to 150DEG C is completed prior to performing extraction filtration to obtain lithium leaching liquid. The method for leaching the lithium form the desiliconized coal ash through alkali sintering-dilute alkali dissolution is put forward for the first time, broad research prospects for extracting the lithium form the coal ash are achieved, a foundation is laid for research in developing lithium resources and application strategies, and meanwhile, industrial utilization valve of the coal ash is improved.