v Suggestions for the development of coal industry To get rid of completely restricted by the internal contradictions of coal enterprises, Power Group did her best in international coal into electricity companies wishing to be a strong point of coal. Electric Industry observers Reporter Wang Bing Ning from Beijing 2 12, reporter learned from the power system, there are already Huaneng Group, Datang Group, Huadian Group and SVA Group 3 with Russia and Indonesia and other overseas coal companies signed a 20 million tons, 260,000 tons, 13 tons and 20 million tons of coal purchase agreement, at the same time, the power system is also combined with Australia s overall share of coal to coal enterprise bargaining agreement, plans to increase purchases will be about 70 Australian coal CIF U.S. dollars / ton (5800 kcal steam coal). That particle dimension regarding slack coal is really 0 25 mm. That use concerning coal is really substantial power energy amenities within. Create a 1 trillion kW power power plant by way of instance, coal use sums to 14, 000 – 13000t each day. It ll consider 60% 80% complete in the expense with regard to bringing in electrical energy. So it s very essential program that coals to much better correct size.
It’s advisable to adopt right coal mill with regard to coal milling plant. This can not alone improve the use concerning coal, but additionally help with power protecting, environmental safety, fiscal benefits. Reported through the market investigation, up and down roller mill must be used almost all significantly. There will also be additional milling generators for instance regular Raymond mill, Roller mill, Trapezium mill, for instance. They might also fulfill a number of conditions regarding milling coal directly into several sizing s in addition to sorts. Buyers could make the ideal coal noted by its distinctive requirements.Suggestions of coal gangue crushing process: 1. If the particle size is about more than 40 mm, we often choose jaw crusher for coarse crushing together with hammer crusher or other crushing equipment for crushing tertairy. And the crushing process is commonly used in production line.
For example, the crushing line in Beijing, Shandong, Jilin, Liaoning and Heilongjiang and so forth. If particle size is less than 40 mm, coal gangue can’t directamente be sent into tertariy crusher for second stage crushing, turning two-stage crushing or three stage crushing into one-stage or two-stage crushing. Thus not only save power, but also simplifies the production processing. For example, Tonghua, Jilin Bureau of Mines Iron Works of gangue material, most of the particle size below 30 mm; If gangue with partical size below 2 mm accounts for more than 20%, it is recommended the raw materials should first get through vibrating screen, after which pipes above screen go for coarse crushing and fine crushing, pipes and under screen directamente go into the mixer before the aging library.