Study on steady-state preparation system of multicomponent coarse aggregate paste

According to the characteristics of Gobi with large material diameter and discontinuous gradation (more coarse and fine particles and less medium particles), a certain proportion of smelting slag is added to optimize its gradation. The basic property test and optimal mix proportion test of filling materials are carried out, and the optimal mix parameters and core process parameters of Gobi material and smelting slag are determined, that is, Gobi material ∶ smelting slag = 7∶3, filling concentration is 78% to 80%, and ash sand ratio is 1∶6 to 1∶10. Because Gobi material contains a large amount of large particle aggregate and the proportion of smelting slag is large, it is difficult to prepare high-quality homogeneous paste slurry. This study proposes a technology to realize accurate measurement and multi-link control of mixing accuracy based on the feed source. Based on this standard and according to the characteristics of Gobi materials and smelting slag, the multi-element coarse aggregate homogeneous mixing technology system, the mixed aggregate precise feeding and metering technology and device, and the mixed aggregate slurry mixing technology and device have been developed. It realizes the accurate measurement of coarse aggregate from the feed source, strictly controls the continuous and stable feeding of multi-component aggregate, and improves the mixing effect of multi-component coarse aggregate, so as to ensure the steady-state preparation of multi-component coarse aggregate paste and ensure the filling quality.