Reformation of Feeding Device of Deep Cone Thickener

Modern tailings water systems generally use closed loops. Thickeners are the key equipment of the tailings water treatment system. The concentration effect of the thickeners will directly affect the operation of the entire concentrator. The structure of the original feeding device mainly includes The defoaming barrel, the feed pipe, the upper straight section of the stabilizing barrel, the upper cone section of the stabilizing barrel, the middle straight section of the stabilizing barrel, the sieve plate and the lower cone section of the hidden barrel are composed of; The overflow weir of the thickener.

The structure of the defoaming cylinder is too simple, the mixing effect of the slurry and flocculant in the defoaming cylinder is poor, and the settling effect of the flocculant is poor; the straight section between the defoaming cylinder and the stabilizing barrel will be connected by a feed pipe, and the slurry will enter the stabilizer. The feed kinetic energy of the straight section between the barrels is large, which affects the sedimentation effect of the thickener, and the concentration efficiency is low; the upper end of the straight section on the stabilizer barrel is higher than the thickener overflow weir, and the clarified water at the upper part of the thickener cannot enter the original feed Inside the device, the flocs have not undergone the process of dilution, and the sedimentation speed of the flocs has slowed down.

The static flow stabilizer is composed of an inlet pipe, a cylinder, a baffle plate, a uniform cloth and a plate outlet pipe. After the flocculant is mixed with the slurry, the direction of the fluid is changed through the baffle plate and the uniform plate to make the flocculant and the slurry full The mixing of the kinetic energy of the mineral pulp at the same time can improve the flocculation effect.

The static steady flow mixer is equipped with two discharge pipes, which can further reduce the kinetic energy of the slurry.

The spiral material stabilization device is composed of an overflow cylinder, a cylinder, a spiral blade, a cloth plate, an inner cone and a lower cone; the upper end of the overflow cylinder is lower than the overflow weir of the thickener, and there are countless numbers on the upper part of the overflow cylinder A "rectangular" slot; the clarified water on the upper part of the thickener will flow through the upper end of the overflow cylinder and the "rectangular" slot into the spiral stabilizer, which realizes the self-dilution of the slurry, and the flocs are diluted to speed up the continuation The settlement rate.

The spiral blades on the inner wall of the spiral material stabilization device are distributed with multiple slots; the slurry entering the cylinder along the spiral blades gradually rises by its own kinetic energy, and a part of the slurry continues to rise along the spiral blades; The slurry flowing to the next spiral blade at the slot and the next spiral blade collides and mineralizes; the remaining part of the slurry flows to the center of the middle cylinder, and further collides and mineralizes with the falling slurry, making the flocculant and the slurry Fully mix to improve the flocculation effect.

Because the concentration of the slurry inside the spiral stabilizer is higher than the slurry injected onto the cone, part of the slurry passes through the small holes on the cone and collides with the spirally rising slurry in countercurrent; while reducing the kinetic energy of the slurry, it further improves Concentrated effect.

After the improvement, it has been running very well so far; the use of static steady flow mixer has improved the flocculant settlement effect of the flocculant; the kinetic energy of the slurry input is reduced through two-person feed pipes, and the purpose of mutual dilution is achieved; through the spiral The spiral blade in the material stabilization device consumes the kinetic energy of the slurry; the upper end of the spiral material stabilization device is lower than the overflow weir of the thickener, which realizes the self-dilution of the slurry and accelerates the sedimentation speed of the slurry; the final concentration of the overflow water of the thickener is small to ensure In order to improve the quality of the circulating water in the system, Xining and its consumption will be saved, reducing operating costs. After the transformation, it can be widely used in large-scale concentrators, and can replace ordinary rake thickeners to process mine tailings slurry.