System and method for preparing ultra-high water filling materials by organic wastewater and industrial solid waste

A technology of organic wastewater and filling materials, which is applied in cement production, etc., can solve the problems of large investment in incineration equipment, difficulty in applying incineration to organic wastewater, and high treatment costs, so as to achieve energy utilization, avoid occupation and pollution, and improve economic efficiency. benefit effect

Active Publication Date: 2017-06-13
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] However, the incineration method has the disadvantages of large equipment investment and high treatment cost. Except for some special wastewater (such as hospital

Method used

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  • System and method for preparing ultra-high water filling materials by organic wastewater and industrial solid waste
  • System and method for preparing ultra-high water filling materials by organic wastewater and industrial solid waste
  • System and method for preparing ultra-high water filling materials by organic wastewater and industrial solid waste

Examples

Experimental program
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Effect test

Example Embodiment

[0088] Example 1

[0089] Prepared according to the above system and the above process, the specific parameters are as follows: pulverize coal gangue, mix with alumina ash, calcium carbide slag, and desulfurized gypsum. Based on solid matter, coal gangue accounts for 25 parts by weight and desulfurized gypsum accounts for 17 parts by weight. Parts, calcium carbide slag accounts for 40 parts by weight, aluminum ash accounts for 18 parts by weight, and iron tailings account for 8 parts by weight. After the materials are mixed, they are ground and homogenized. After pressure filtration, they are directly transported into the rotary kiln for calcination. The calcination temperature is 1270°C and the calcination time is 80 minutes. The main phases of the clinker after firing are calcium sulfoaluminate and dicalcium silicate. Take the above-mentioned base material, add 1.0% quick-setting agent, 1.5% swelling agent, 1.5% dispersant, and 96 parts of water, each of which has the same mas...

Example Embodiment

[0090] Example 2

[0091] Prepared according to the above system and the above process, the specific parameters are as follows: pulverize coal gangue, mix with alumina ash, calcium carbide slag, and desulfurized gypsum. In terms of solid matter, coal gangue is 23 parts by weight and desulfurized gypsum is 22 parts by weight. Calcium carbide slag is 35 parts by weight, aluminum ash is 20 parts by weight, and iron tailings is 11 parts by weight. After the materials are mixed, they are ground and homogenized, and then directly transported to the rotary kiln for calcination after pressure filtration. The calcination temperature is 1350°C and the calcination time is 80 minutes. Take the above base material, add 0.5% quick-setting agent, 1.5% expansion agent, 1.0% dispersant, and 97 parts of water. The mass of each 2 parts of water is the same as that of the above base material. Mix thoroughly Preparation of ultra-high water filling material. The initial setting time is 10 minutes, t...

Example Embodiment

[0092] Example 3

[0093] It is prepared according to the above system and the above process. The specific parameters are as follows: pulverize coal gangue, mix with alumina ash, calcium carbide slag, and desulfurized gypsum. Based on solid matter, coal gangue is 21 parts by weight and desulfurized gypsum is 20 parts by weight. Parts, calcium carbide slag is 37 parts by weight, aluminum ash is 15 parts by weight, and iron tailings is 15 parts by weight. After the materials are mixed, they are ground and homogenized, and then directly transported to the rotary kiln for calcination after pressure filtration. The calcination temperature is 1350°C and the calcination time is 75 minutes. Take the above-mentioned base material, add 1.0% quick-setting agent, 0.5% swelling agent, 1.5% dispersant, and 97 parts of water. The mass of each 2 parts of water is the same as the above-mentioned base material. Mix thoroughly Preparation of ultra-high water filling material. The initial setting ...

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Abstract

The invention discloses a system and a method for preparing ultra-high water filling materials by organic wastewater and industrial solid waste. The system comprises a wet pulverizer, a pressure filter, an equalizing basin, a rotary kiln and an indirect heat exchanger. Desulfurized gypsum, aluminum ash, carbide slag, coal gangue, iron tailings and part of the organic wastewater are mixed to obtain mixed solution, the water content of the mixed solution is 60%-70% (mass), the mixed solution is pulverized by a wet process, wet pulverized materials are equalized to obtain slurry, the slurry is mechanically pressed, filtered and dewatered to obtain paste, the other part of the organic wastewater is concentrated, then enters the rotary kiln together with the paste and calcined at high temperature to obtain base materials, pulverized coal is sprayed into the rotary kiln in the high-temperature calcining process, so that the pulverized coal and organic matters in the mixed paste are burnt, and finally, the base materials, accelerators, dispersants, expanding agents and water are prepared into the ultra-high water filling materials. The system and the method can be used for preparing the novel ultra-high water filling materials by reusing the industrial solid waste.

Description

technical field [0001] The invention relates to a system and a method for preparing ultra-high water filling materials by cooperating with organic waste water and industrial solid waste. Background technique [0002] The development of backfill technology in coal mines and other mined-out areas has been relatively lagging behind, which reduces the efficiency of mining, increases the cost of mining, and causes reduced safety hazards to society and the environment. As a new backfill material, ultra-high water filling material has attracted more and more attention. Ultra-high water filling materials must have good performance before they can be used in goaf filling replacement mining. Specifically, they should have the following basic properties: 1. The compressive strength of the solidified filling material should exceed 2MPa; 2. It must have good 3. Appropriate curing characteristics (mainly refers to the initial setting time and final setting time of the material); 4. Compa...

Claims

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Application Information

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IPC IPC(8): C04B7/24
CPCC04B7/24Y02P40/10
Inventor 王文龙刘晓斌孙静宋占龙赵希强毛岩鹏
Owner SHANDONG UNIV
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