A kind of sand and gravel depowder classification construction technology

Abstract

The invention discloses a sand and gravel depowdering and grading construction process. Step 1: the rotor is connected with a motor to rotate through electricity, and clean air is sent into the inside of the first cavity cover from the air inlet; Step 2: the sand and gravel raw material is interrupted from the feeding port It enters in one after another, and is driven by the motor to rotate at the rotor to break up and depowder the sand and gravel. The dust is sucked out from the air outlet for subsequent treatment. Next, the screening holes on the first diversion grading plate will screen the largest sand and gravel, and the arc-shaped inner wall of the diversion grading plate will be discharged from the screening hole on the bottom plate of the hood after a rotary motion, and then the smaller ones will be discharged. The sand is then screened by the screening holes on the next diversion grading plate until it is screened by the screening holes on the diversion grading plate set according to the needs of classification; to achieve rapid grading of sand and gravel, It reduces the workload of subsequent gravel classification and improves production efficiency.

Description

technical field [0001] The invention relates to a construction process for depowdering and classifying sand and gravel, and belongs to the technical field of sand and gravel production. Background technique [0002] When the processing source is mining dolomite, a sand and gravel production system with an annual output of 3 million tons is required. The system adopts dry production, and the overall use of closed workshops and dust collectors meets safety and environmental protection requirements. The powder selection workshop adopts JND-VI powder separator selects raw sand < 3mm, and uses 15kw screw elevator, QPB(Ⅱ)-4.0 warehouse pump and supporting DN120 pipeline to transport stone powder < 0.075mm, with a delivery capacity of 15t / h; passed the field test The following data is obtained: the moisture content of the finished sand (0.075mm-3mm, designed delivery capacity 75t / h) of B19 belt conveyor is 1.2% to 2.38%, which meets the powder selection conditions as a whole;...

AI Technical Summary

Problems solved by technology

[0003] In the sand and gravel production system, the de-powdering machine (also called powder separator) currently used cannot complete the rapid classification of sand and gravel after de-powdering is completed, which increases the workload of subsequent sand and gravel classification and reduces production efficiency.

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