Heaping and drainage method combining fine particle tailing dry heaping damming and wetting

Abstract

The invention discloses a heaping and drainage method combining fine particle tailing dry heaping damming and wetting. After waste residues obtained after mineral separation of a dressing plant (1) are subjected to first solid-liquid separation through a thickener (2), and clear water serves as overflow and flows back to the dressing plant to be reutilized; after underflow with the concentration being 40% to 45% flows through a tailing conveying pipe, one path is directly transported to a tailing pond (7) through pumping or flowing by itself via a dividing blowing pipe (4), and the other pathenters a movable separator (5) which is placed on a loose heaping dam and can move and walk for second solid-liquid separation; and secondary separation underflow with the concentration being 70% to 75% is used for building and discharging a tailing heaping dam (6), high-concentration underflow is directly used for heaping and damming, the strength of the tailing heaping dam (6) is enhanced, and overflow is drained to the tailing pond (7). According to the heaping and drainage method, clear tailing water of a downstream impounding reservoir (8) after solid-liquid separation is conveyed back tothe dressing plant to be reutilized, zero emission of waste water is achieved, and energy saving, emission reducing and clean production are achieved; and the beneficial effects of being convenient to operate, low in cost, high in tailing solid-liquid separation and damming efficiency and capable of combining dry heaping damming and wetting are achieved.

Description

technical field [0001] The invention relates to a dam-building method for tailings in the ore dressing industry, in particular to a fine-grained tailings dry-stack dam-building method combined with wet discharge. Background technique [0002] Tailings are the waste residues discharged by the concentrator after selecting useful mineral components from the ore under the existing technical conditions, usually in the form of solid-liquid mixed slurry. With the gradual improvement of beneficiation technology and recovery rate, the coarse sand in the tailings has been comprehensively used, making the particle size of the tailings in the tailings finer and finer. At present, there are mainly two methods for solid-liquid separation and dam building of fine tailings: [0003] One is to discharge the fine-grained tailings slurry into the tailings dam for sedimentation. Water and solid particles are gradually separated in the tailings dam by natural sedimentation. The solid particles ...

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Problems solved by technology

[0006] The purpose of the present invention is to provide an easy-to-operate, low-cost, Solid-liquid separation of tailings and high efficiency of dam building, which can realize the combination of dry stacking dam and wet drainage of fine-grained tailings combined dry stacking dam and wet drainage method

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