Filling method of low-density high-strength full-milltailing slurry

Abstract

The invention discloses a filling method of low-density high-strength full-milltailing slurry. The filling method comprises the following steps: (1) conveying full-milltailing slurry of a concentration plant to a thickener of a filling station, adding a flocculant according to a bottom flow concentration of the thickener, performing flocculating settling so as to form high-concentration bottom flow mortar, enabling overflowing clean water to flow to a clean water tank by self, forming bottom flows into high-concentration full-milltailing slurry, opening a cabin bottom activation pulping device, and performing full-cabin disturbance on the high-concentration full-milltailing slurry intermittently in a mill discharge process; (2) pumping the high-concentration full-milltailing slurry of which the concentration meets standards in the step (1) into a stirring system, wherein the stirring system consists of a first section of mixing stirring and a second section of activation stirring; and(3) conveying cement and water into the first section of mixing stirring in the step (2), sufficiently stirring and mixing the cement and the water with the high-concentration full-milltailing slurry,performing the second section of activation stirring, so as to form filling slurry of qualified quality and concentration, wherein a foaming type additive is added in the step (3). By adopting the filling method, low-density resistance-improvement conveying of the filling slurry can be achieved.

Description

technical field [0001] The invention relates to the technical field of mine filling, and more specifically relates to a filling method of low-density high-strength full tailing sand slurry. Background technique [0002] Due to the height difference in pipeline transportation of full tailings filling materials in deep wells, the static pressure of the pipeline is generally large, which is prone to hidden dangers of pipe burst and nozzle. In order to ensure safe and smooth filling, mechanical pressure adjustment methods such as increasing the length of the pipeline, setting up resistance-increasing pipes, resistance-increasing rings, resistance-increasing boxes, and pressure relief pools are commonly used to reduce pipeline transportation pressure. Mechanical pressure regulation mainly uses mechanical components to increase pipeline transportation resistance or release pressure, which requires increased engineering and material consumption. Setting up a pressure relief pool us...

AI Technical Summary

Problems solved by technology

Mechanical pressure regulation mainly uses mechanical components to increase pipeline transportation resistance or release pressure, both of which need to increase engineering and material consumption. Setting up a pressure relief pool usually r...