I. Introduction Is well known, three elements of nitrogen and potassium fertilizer phosphorus ratio of arable land unreasonable, high nitrogen, phosphorus and potassium is low [1]. Nitrogen fertilizer and phosphate fertilizer basically meet the needs in fertilizer production, and due to the lack o

When the grinding machine rotates at a certain rotation speed, the grinding medium in the cylinder body generates centrifugal force due to rotation, so that a certain frictional force is generated between the grinding medium and the cylinder body. The friction will drive the grinding medium to rota

In the process of molybdenum ore beneficiation , some processes produce a low-grade molybdenum ore that is difficult to recover by flotation; some have too high levels of impurities to obtain qualified molybdenum concentrates (or low-grade molybdenum concentrates). The use of these unqualified moly

Maifanshi constituting maifanite genus volcanic rocks, volcanic minerals are mainly. Maifan Stone is believed to be buried in the volcanic volcano from 5,000 to 75,500 years ago. It is formed by the acidity of the volcanic high-humidity, hot springs and the pressure generated by the changes in the e

First of all, the structural design and calculation of the hammer crusher disc There are 8 hammers required to break each pin on the hammer. The disc is used to suspend the hammer head. A total of 9 discs are required, according to the design requirements. The two sides of the two sides have the c

When the water partial separation titanate, in part of smaller particles of metatitanic acid through the filter layer and into the filtrate (i.e., the spent acid), and to improve the recovery rate must recover this metatitanic acid. A plurality of plastic rice settling tanks are generally used for

As mentioned above, the black medicine is obtained by the action of alcohol or phenol and phosphorus pentasulfide . The reaction is as follows: S / P 2 S 5 + 4ROH—→2(RO) 2 P—SH+H 2 S Alcohol or phenol black medicine But the following reactions will also occur simultaneousl

The requirements for corporate profit management are: 1. A socialist enterprise must have a profit and must not have a loss. However, the main way to increase profits is to increase production and achieve maximum economic benefits with minimum labor consumption. 2. Strengthen sales management, ca

Vaccine cold chain truck price_imported cold machine vaccine transfer truck_manufacturer's direct price is superior. If there is a suspected rabies exposure who needs to be vaccinated against rabies, and those who need to be vaccinated against tetanus for other trau

Ball mill operating procedures and maintenance 1. Before starting the grinding machine, check whether the connecting bolts are tightened, the gears, the keys of the coupling and the fastening of the ore feeder. Second, check whether the oil in the fuel tank and reducer is sufficient, and whether

Our country is a national shortage of copper metal, according to the prediction of mineral resources and the current development rate, by 2020, will be a serious shortage of copper resources. Although China's copper metal reserves have more than 60 million tons, but rich in ore, rich in ore, lo

Some metals with oxidation-reduction potential lower than the Hg 2+, such as Fe 2+, Cu, Fe, Zn , Al, Mg and the like, to the corresponding metal chips charged showing packed column replaced with Hg 2+ ions in waste water. For example, the mercury removal reaction with Fe: Fe+ Hg 2+ = Fe 2+ +Hgâ�