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Method for preparing environment-friendly water permeable bricks by using iron tailings

A technology for iron tailings and permeable bricks, applied in applications, ceramic products, household appliances, etc., can solve the problem of low utilization rate of tailings resources, improve mechanical strength and wear resistance, excellent product performance, and reduce sintering. effect of temperature

Inactive Publication Date: 2013-07-17
UNIV OF SCI & TECH BEIJING +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for applying iron tailings to environment-friendly permeable bricks, and successfully develop green environment-friendly permeable bricks with iron tailings as the main raw material. The bricks have good water permeability, high strength, and can be fired The temperature is appropriate, the cost is low, and the structure is excellent. It is an environmentally friendly green building material suitable for urban square pavements and sidewalks. It not only solves the problem of low utilization of tailings resources, but also provides a new type of permeable material for building environmental protection. Realized turning waste into treasure, turning harm into profit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to the weight percentage composition in the table below, the environmentally friendly permeable bricks are prepared according to the technological process of raw material crushing, ball milling, batching, mixing, drying, molding and firing

[0023] Potassium feldspar clay glass powder quartz iron tailings Silicon carbide 10 24 10 20 35 1

[0024] Some of the process parameters are: wet grinding time: 16 hours, pass through a 200-mesh sieve; dry pressing molding, molding pressure is 30MPa; firing temperature: 1150°C, heat preservation for 40 minutes.

[0025] The prepared foamed ceramic material has a uniform pore size distribution, a porosity of 30%, and a bulk density of 1.2 g / cm 3 , water permeability 0.013cm / s, compressive strength 50MPa.

Embodiment 2

[0027] According to the weight percentage composition in the following table, the environmentally friendly permeable bricks are prepared according to the technological process of raw material crushing, ball milling, batching, mixing, drying, firing and molding, and mechanical processing

[0028] Potassium feldspar clay glass powder quartz iron tailings Silicon carbide 8 12 10 17 52 1

[0029] Some of the process parameters are: ball milling time: 12 hours, passing through a 200-mesh sieve; the dried powder is directly put into the baffle for firing without molding; firing temperature: 1200°C, and kept for 40 minutes.

[0030] The prepared foamed ceramic material has a uniform pore size distribution, a porosity of 46%, and a bulk density of 0.9 g / cm 3 , the water permeability is 0.024cm / s, and the compressive strength is 36MPa.

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Abstract

The invention discloses a method for preparing environment-friendly water permeable bricks by using iron tailings, belonging to the field of comprehensive utilization of iron tailing resources and construction ceramic materials. The method is characterized in that through taking iron tailings as basic aggregates and introducing a certain amount of waste broken glass, an environment-friendly water permeable brick with excellent performance is prepared. The method comprises the following process steps of raw material crushing, ball milling, material dispensing, mixing, drying, molding, sintering, cutting and grinding. The dispensed material comprises the following ingredients in percentage by weight: 30-60% of iron tailings powder, 5-15% waste glass powder, 15-30% of clay, 15-24% of quartz, 5-15% of potash feldspar, and 0.25-1.5% of silicon carbide. The prepared water permeable brick is high in compressive strength, good in abrasion resistance and excellent in water permeability, and accords with national related standards of water permeable bricks, therefore, the method creates a new way for the high-technology and high value-added application of iron tailing resources.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of iron tailings resources and building ceramic materials, and in particular relates to a method for preparing environment-friendly permeable bricks by using iron tailings. technical background [0002] With the development of the economy and the process of modernization, many towns are gradually covered by reinforced concrete houses, large-scale infrastructure and various impermeable sites and roads. While providing convenience for people, these impervious surfaces also bring many negative impacts to the ecological environment of the city. The hardening of the surface makes it difficult for atmospheric precipitation to infiltrate into the ground in a timely manner, increasing surface runoff, forming a heat island effect and insufficient drainage, causing environmental problems such as waterlogging and urban surface settlement. Permeable bricks have many characteristics that other bricks d...

Claims

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Application Information

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IPC IPC(8): C04B38/06
Inventor 隋延力石棋熊守安郭志猛刘祥庆刘曙黎邦城杨剑刘红光张泽苏浩于潇
Owner UNIV OF SCI & TECH BEIJING
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