Equipment for producing powdery phosphate concentrate by adopting two-stage hydrocyclone open circuit flow

Abstract

The invention relates to equipment for producing powdery phosphate concentrate by adopting a two-stage hydrocyclone open circuit flow and belongs to a hydrocyclone for mineral selection. The equipment for producing the powdery phosphate concentrate by adopting the two-stage hydrocyclone open circuit flow comprises a first-stage three-phase flow hydrocyclone, a second-stage two-phase flow hydrocyclone, a pipeline and a mortar pump which are connected with one another, wherein mineral powder in the size fraction of 0-1000Mum is set to be in a first-stage +38Mum size fraction grading point, a solid, liquid and gas three-phase flow hydrocyclone with the diameter Phi of 350mm is adopted for carrying out separation treatment in a first stage, fine particles obtained after separation treatment is carried out by virtue of the first-stage three-phase flow hydrocyclone overflow, pass through the mortar pump and are pumped into a two-phase flow hydrocyclone with the diameter Phi of 75mm in the second stage, and a + / -10Mum size fraction desliming point at the second stage, and the separation treatment is carried out by adopting the two-phase flow hydrocyclone with the diameter Phi of 75mm in the second stage.

Description

technical field [0001] The invention relates to equipment for producing powdered phosphorus concentrate in a two-stage cyclone open-circuit process, which belongs to a hydraulic cyclone for ore dressing. Background technique [0002] The existing medium and low-grade collophosphine 1000~0μm particle size uses a three-stage hydrocyclone open-circuit process to produce powdered phosphorus concentrate. It has been applied for 8 years in 2013, and the production practice has proved that there are three defects as follows. [0003] 1. Poor adaptability of hydrocyclone [0004] Let me first introduce a technical term: equal-fall particles or equal-fall phenomena. In the same medium, particles with different density, particle size and shape can have the same final sedimentation velocity under certain conditions. Such corresponding particles are called equal-fall particles. called the equalization ratio. For example, the density is 2.65g / cm 3 , Quartz with a particle size of 74...

AI Technical Summary

Problems solved by technology

As a result, in addition to the large impact on this operation, the second and third stages of hydrocyclones have also been greatly affected

[0005] 2. Poor coaxiality and short separation cone length unit

Data indicate shorter separation length units and weaker separation strength in addition to poor adaptability

[0008] 3. The structure of the hydrocyclone is difficult to remove the clogging of the grit nozzle: since the grit nozzle is fastened by flange bolts, once the grit nozzle is clogged on the cone, it must be cleared in time

The particle size content of the +74μm classification point changes quite a lot, resulting in considerable fluctuations in operating efficiency, causing great pressure and impact on the +38 and +19μm classification points, which is the reason for the unstable production process of the "three-open method"

The main reason for the low concentrate yield and high tailings grade of the "three-opening method" is that the +10μm desliming point is not set and the +74μm classification point is set

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