A lot of harmful waste dust such as C\2, HC1 and high temperature dust were produced in the process, what's more, the recovery was often lower than 50%. It is necessary to develop a new technique in which the recovery of V2O5 is satisfactory and there is no air pollution.
Without roasting operation with sodium, the chemical separation method did not produce C12, HC1 and other waste dust. The recovery of Vanadium was more than 75%, the waste solution can easily be treated by using CaCO3 or CaO.
In this paper, a new replacing-diffusing principle has been raised for removing smoke and dust process in chamber stope. A new calculating formula of air quantity has been developed on the basis of the principle.
The parameters considered are the applied high voltage U, the air flow F, and the quantity of dust in air m.
例句来源
The Einstein gravitational equations in the spherically symmetric case and for the dust model (i.e., p = 0) have been studied by several authors.
例句来源
In this case, the mixture area consists of abrasive dust from friction pairs, and the surface film is distributed with crumby hard granules, exiguous oxide, carbide granules and sheared slender fibre.
例句来源
The values of optimal fiber radii are determined from the condition of maximal dust capacity of a filter at given limiting pressure drop and total initial efficiency.
例句来源
On the Possible Existence of Radiation Dust Belts in Near-Earth Space
For determining the lower limit of explosibility of coal dust cloud in laboratory,the authors have designed an apparatus capable of uniformly producing such clouds.The effect of fineness of coal dust, methane and stone dust on the lower limit of the explosibility of coal dust clouds has been investigated on a number of samples taken from several coalfields. The results obtained show : 1.The lower limit of the explosibility of coal dust clouds is closely related to the volatile ...
The article gives a general overview of the achievements obtained during the thirty years since the founding of the People's Republic of China in the fields of ventilation,complex measures of dust prevention,dust prevention in open pit prevention of spontaneous combustion etc.as well as the concern of the Party and the Government over miner's safety and health. The article also points out problem areas in the science and technology of ventilation and dust prevention.The author suggests maj...
The space near a slope in a tunnel,beyond the end of vent jet-flow is,in general,considered as a "stagnation zone: in which the ventilation seems to be ineffective,and the functional range of forced ventilation Ln is equal to the range of jet-flow or it may be expressed aswhere S is the cross section area of a tunnel.But the expression doesn't conform to reality.The fact is that the dust concentration in the atmosphere,even if Ln is rather more than (4-5)S,is still below the dust cleaning standa...