Method for fabricating lightweight wall body by using BIF mine tailings

A light-weight wall and tailings technology, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of low consumption, high cost, and low utilization rate of tailings, and achieve uniform color , smooth surface effect

Inactive Publication Date: 2007-10-10
SHANGHAI UNIV +1
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] At home and abroad, there has been some research and development on the use of iron tailings to prepare wall materials such as steam-cured bricks, sintered bricks and non-burning and non-steaming bricks, but there a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] The process and steps of this embodiment are as follows:

[0029] (1) Firstly, the lye modified biomass binder is prepared in advance. The preparation method is as follows: rice straw or wheat straw is pulverized and mixed according to the formula, and then mixed, and 0.1 mol concentration sodium hydroxide solution is added to the batch. Heat to 90°C, stir and mix, and limit it to lye modified biomass binder for use.

[0030] (2) Weigh 90Kg of BIF tailings, 5Kg of inorganic calcium gelling agent, 5Kg of the above-mentioned lye-modified biomass binder, add a small amount of water, and place it in a high-speed mixer for stirring and mixing. Follow the traditional conventional process method Various processes, namely forming, drying, baking, and finally making lightweight bricks or block wall materials.

[0031] The light-weight brick made in this embodiment has uniform color, smooth surface and no cracks; the bulk density is 1.314g / cm 3 , The apparent poros...

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Abstract

This invention relates to a method for preparing lightweight wall material from BIF gangue. The raw materials comprise: BIF gangue 85-90 wt. %, inorganic calcium gelatinizing agent (one of cement, lime and gypsum) 5-10 wt. %, and lye-modified biomass binder (one of paddy straw and wheat straw) 5-10 wt. %. The method comprises: preparing the raw materials, mixing by stirring, molding, drying and sintering. The lightweight wall material has such advantages as light weight (1.14-1.4 g/cm3), high porosity (25-40%), and high compressive strength (3.0-10.0 MPa).

Description

technical field [0001] The invention relates to a method for preparing light-weight wall materials by using BIF tailings, and belongs to the technical field of waste residue utilization and building material preparation technology. Background technique [0002] A large amount of tailings are produced during the development and processing of mineral resources. The tailings are generally transported to the tailings pond by hydraulic power through pipelines, and are disposed of by sedimentation-pile. The stockpiled tailings occupy a large amount of land, which has a serious impact on the water environment, atmospheric environment and farmland around the mining area; the tailings have become the main source of environmental pollution in the mining area. However, on the other hand, tailings composed of a variety of minerals are very rich secondary resources, and the resource utilization of tailings is an urgent problem to be solved under the increasingly prominent contradiction b...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B28/00C04B18/12C04B16/02
CPCY02W30/91
Inventor 郑乐平李学金
Owner SHANGHAI UNIV
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