Activation Of Pozzuolanic Action In Coal Gangue

The way that the comprehensive utilization is the most extensive of CG(coal gangue) is used as the production building materials. The coal gangue (CG) was used as admixture in cement, this way is most available for it comprehensive utilization, owing to CA provided poor Pozzuolanic action, the magnitude of CG utilized was restricted. To expand CG comprehensive utilization, activation technology need adopted about improving CG Pozzuolanic action.The analysis by way of size and density, as well as XRD etc the modern measuring technique, has carried on high energy sphere mill research to calcining afterwards the CG Studying the result indicates: easy mill of CG is good, and the trial is ground slightly the anything small and roundish which ground below 1h,10 μm and has been up to 50%, and after the high energy sphere grinds 5h, the anything small and roundish almost completely achieves below 10 μm. Lengthening of time is ground along with the powder to the density of waste, and reducing after enlarging first, and has appeared again in stage to enlarge to the balance, afterwards the change is unclear again; The high energy sphere mill is dealt with the CG and can be initiated a series of machinery power chemical effects, and the thing that changes the CG is each other formed reaching the structure. Analysis of XRD and FT-IR result indicates that the high energy spheregrinds and makes that the kaolin crystal does not have the settingization gradually in the CG, completely disappearing behind the 5h, the crystal level of a - quartz reduces, and Al-O key and Si-O key ability and key structure occurred the clear change.The quantity of formation hydration sulphur aluminic acid calcium can raise the CG macroscopic active; And grinds under the thin silicon naturepowder material existence, content that increased active silicate can raisecoal waste intensity.The suitable temperature calcining will be selected in the hot activation of waste. The temperature is low excessively, can make the carbon not burnup in the CG, and the active component part given rise to is opposite to each other fewlyer, not to be of advantage to actively giving play to; When overtopping, the active component part can be reacted again further, and comeing or bring into being does not have the active matter. The optimum temperature calcining of this experiment is 750℃; Becoming cool the method to calcine temperature when higher influence to active fairly bigger, the vitreous body that passes through impatient coldly can to increase to forge to burn in the CG is each other, and these vitreous bodies occur two times reacting with the part of hydration product outcome that the cement gave rise to in the hydration, and it is active that to show out highlyer macroscopic; The chemical composition of CG and mineral is formed differently, and the activation function is also different.Carrying on the CG with the tunnel cave does admixture in cement and calcines that the practice result indicates: material and by a large number of utilizations are Pozzuolanic to the volcano grey matter that the CG after the hot activation can be regarded in the cement.