Building waste material utilization method

A technology for construction waste and particles, applied in the field of environmental protection, can solve the problems of inapplicable calcium-containing waste, the scope of utilization can only be reused within the scope of construction projects, and high-purity calcium carbonate cannot be obtained, so as to save the amount of mining and realize a closed loop. The effect of recycling and reducing emissions

Inactive Publication Date: 2017-01-25
YUANCHU TECH (BEIJING) CO LTD
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Problems solved by technology

This construction waste utilization method usually only utilizes construction waste such as waste concrete, and is not suitable for the utilization of other calcium-containing waste, and only granulates construction waste, and cannot obtain high-purity calcium carbonate. It can only be reused within the scope of construction works

Method used

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Embodiment Construction

[0047] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

[0048] figure 1 A process flow diagram showing a construction waste utilization method according to a first embodiment of the present invention, the construction waste utilization method includes: firstly, preprocessing the construction waste to obtain particles in a predetermined size range, and then extracting from the particles to obtain useful compounds.

[0049] Described pretreatment step comprises again:

[0050] First, the construction waste is crushed. The calcium element contained in the construction waste is, for example, waste cement, gypsum board, concrete, stones, bricks, red mud and the like produced in the demolition of waste buildings. In this embodiment, the construction waste is concrete. The construction waste, that is, concrete, is collected, and crushed uniformly, so as to obtain construction waste blocks, that is, concrete blocks,...

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Abstract

The invention discloses a building waste material utilization method. The building waste material utilization method comprises the steps of pretreating building waste materials into particles with size in a preset size range; and obtaining calcium carbonate from the particles. According to the building waste material utilization method provided by the invention, the range of the usable building waste materials is wider, and useful compounds which have higher purity and facilitate wider application can be obtained.

Description

technical field [0001] The invention relates to the field of environmental protection, and more specifically, to a method for utilizing construction waste. Background technique [0002] Demolition and demolition of old buildings will produce a large amount of waste cement concrete, which will cause the ecological environment to deteriorate day by day; and, in order to produce new cement, it is necessary to mine a large amount of limestone mines from nature, which will also cause damage to ecological natural resources. At present, natural limestone resources are very limited and will become increasingly scarce. At the same time, the main component of limestone ore is calcium carbonate (CaCO 3 ), in the process of using natural limestone ore to produce cement, glass and other industrial products, the limestone ore should be calcined at high temperature to generate quicklime (CaO), thereby releasing a large amount of carbon dioxide (CO 2 ). Carbon dioxide, as a major greenho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C01F11/06
CPCC01F11/06C01F11/18C01F11/02C01F11/28C04B14/06C04B14/28C04B20/026Y02W30/58Y02W30/91B09B3/80B09B3/40C04B18/16C01B32/50C01B33/12B02C23/38B02C23/14B02C23/06C01F11/185
Inventor 魏巍王麒
Owner YUANCHU TECH (BEIJING) CO LTD
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