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Method for producing reclaimed machine-made sand with building rubbish

A construction waste and production method technology, applied in the field of green building materials, can solve problems such as damage to the sand making machine, inability to enter, and low sand making efficiency, and achieve the effects of good particle size, avoidance of damage, and high sand making rate.

Inactive Publication Date: 2011-07-06
上海德滨环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the material entering the sand making machine should generally not be larger than 50mm, and construction waste of 100mm×100mm cannot enter the sand making machine; on the other hand, metal objects such as iron blocks and steel bars entering the sand making machine will seriously damage the sand making machine.
The use of traditional hammer crushers to crush construction waste in the state of crushed stones of 100mm×100mm not only has low sand-making efficiency, poor grain shape, and many needle-like flakes.

Method used

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  • Method for producing reclaimed machine-made sand with building rubbish
  • Method for producing reclaimed machine-made sand with building rubbish
  • Method for producing reclaimed machine-made sand with building rubbish

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Experimental program
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Effect test

Embodiment 1

[0010] Such as figure 1 As shown, the production method of construction waste recycled machine-made sand of the present invention comprises the following steps:

[0011] Coarse crushing, magnetic separation, sorting, secondary crushing, primary sieving, magnetic separation, tertiary crushing, sand making, air separation, dust collection, and secondary sieving.

[0012] Firstly, the jaw crusher is used to roughly break the construction waste, and the construction waste is broken into materials with a maximum particle size of no more than 150mm; a wide, flat, and slow-moving belt conveyor is used to transport the coarsely broken construction waste to the counter In the impact crusher, the transmission process uses machinery, such as magnetic separation equipment to absorb metal substances and artificially assist in sorting wood and other debris. Various construction wastes are crushed in the impact crusher. Driven by the high-speed rotation of the impact crusher rotor, It can r...

Embodiment 2

[0014] When the construction waste processed by the method of Example 1 is mainly construction waste such as beams, columns, slabs, road concrete and other waste concrete, the technical indicators of the construction waste recycled machine-made sand are as shown in Table 1.

[0015] Table 1 Technical indicators of waste concrete construction waste manufactured sand

[0016]

Embodiment 3

[0018] When the construction waste processed by the method of Example 1 is waste concrete such as beams, columns, slabs, road concrete, and mixed construction waste such as broken bricks, rubble, pottery, glass, etc., the technical indicators of the construction waste recycled machine-made sand are as shown in Table 2.

[0019] Table 2 Technical indicators of mixed construction waste manufactured sand

[0020]

[0021] The results show that the production method of construction waste recycled machine-made sand of the present invention has the following beneficial effects:

[0022] 1. The recycled machine-made sand reaches the national standard of secondary sand

[0023] In the method of the invention, firstly, materials with a large soil content of ≤ 5mm are stripped off to make sand, and the produced regenerated machine-made sand does not contain soil. After testing, the mud content is less than 1%, which meets the requirement of the national standard "cobbles and gravel ...

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Abstract

The invention discloses a method for producing reclaimed machine-made sand with building rubbish. The method comprises the following steps: primary crushing, magnetic separation and sorting, secondary crushing, primary screening, magnetic separation, tertiary crushing for sand making, winnowing dust collection as well as secondary screening. The invention has the advantages that the sand production rate is high, an impact crusher can be prevented from damage, and the produced reclaimed machine-made sand has uniform particle size and meets the national standards for Class II sand.

Description

technical field [0001] The invention relates to green building materials, in particular to a method for producing recycled machine-made sand from construction waste. Background technique [0002] For a long time, my country lacks in-depth research and technological development on the recycling, manufacturing and processing of recycled aggregates. The Chinese invention patent application titled "Technical Method of Building Reclaimed Sand" with application number 02132605.3 discloses a process method of building recycled sand: the construction waste after building demolition is mechanically crushed into 100mm×100mm pieces Construction waste in the state of stone; reclaimed sand in the state of fine sand by mechanically crushing the construction waste in the state of crushed stone. The above invention application does not disclose how to remove the soil, sawdust and other substances in the construction waste to obtain the technical index of the reclaimed sand: the mud content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/16
CPCY02W30/91
Inventor 杨德志陆沈磊刘琼黄如柏夏有月李娜熊新元董杨
Owner 上海德滨环保科技有限公司
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