Dam core wall gravel-doped stone preparation system and method

Abstract

The invention relates to a dam core wall gravel-doped stone preparation system. A bar type feeding machine is arranged under a receiving bin; a plus sieve of the bar type feeding machine is connected with a jaw type crusher; a minus sieve of a bar type feeding machine and a discharging opening of the jaw type crusher are connected with a gravel semi-finished product storage yard by a belt conveyor; the gravel semi-finished product storage yard is connected with a screening machine by the belt conveyor; the minus sieve of the screening machine is connected with a gravel finished product storage yard by the belt conveyor; the plus sieve of the screening machine is connected with a cone crusher; and an outlet of the cone crusher is connected with the gravel finished product storage yard by the belt conveyor. The invention realizes the aim of obtaining grading curve gravel meeting the design requirement just by two-stage crushing and one-stage screening by the set matching of rough crushing and intermediate crushing technologies. By reasonably configuring equipment and reducing the crushing and screening procedure, the content of particles smaller than 5mm in a gravel finished product does not exceed 8 percent and meets the process requirement of smaller than 10 percent; and an isolating screen of 5mm is not arranged, and the invention has no discarded materials.

Description

technical field [0001] The invention relates to a stone material preparation system and method, in particular to a gravel material preparation system and method suitable for dam core walls. Background technique [0002] The dam core wall mixed with gravel material requires a continuous gradation, in which the maximum particle size of the gravel material is <120 mm, and the particle content of particles with a particle size below 5 mm does not exceed 10%, and the particle grading curve of the gravel material has a strict curve range. In the prior art, there are generally two processing techniques for the dam core wall mixed gravel system. One is to set up a first-level compound breaker to control the upper limit of product particles; add a 5mm sieve to control the particle content of less than 5mm, that is, the lower limit; the intermediate gradation is only adjusted by the compound breaker, which has large fluctuations and is difficult to control; the product quality slig...

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Problems solved by technology

The second is to set up multi-stage crushing and multi-stage screening, and classify and produce 120~80mm, 80~40mm, 40~20mm, 20~5mm, <5mm according to the usual sandstone system process, and then according to the particle grading curve of the gravel material Composition, taken out for blending; quality control is reliable, but the process is complicated and the operating cost is high

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