The paper analyzed the influence of the coal industrial analysis index, element analysis index and micro organic quantitative analysis index affected to the contact angle of coal water balance.

In order to make gas of iron and steel complex reach dynamic equilibrium,for zero emission,elimination of pollution source,and clean production,the investigation gas balance at Maanshan Steel was made.

The main factors of the influence of gas balance on iron and steel enterprises are systematically analyzed in this paper and the author points out that there is a slightly insufficient gas in static equilibrium, that dynamic equilibrium should be supplemented by proper cushioning users, and that gas mixture station should be established so as to make the best use of gas.

Considering the technical characteristic of gas balance, firstly, this paper presents three types of forecast-models of gas consumes for three sorts of gas users which are relatively steel rolling users, steel-making users and agglomeration users.

To realize a true balance sampling receiver and resolve the pulse leakage of template signal in former receivers,a novel sampling-head is proposed.

Based on the established experimental method of water injection coal samples and isothermal adsorption experiments to stimulate real reservoir conditions,the Isothermal Adsorption/Desorption System Model IS-100 and Electrohydraulic Servo Rock System Model MTS815 are used as the main apparatuses to carry on injecting water in coals with different ranks under high pressure(8～20 MPa).