Environment-friendly water-permeable brick prepared with blast furnace slag and sludge as main materials and preparation method of environment-friendly water-permeable brick

A technology of blast furnace slag and permeable bricks, which is applied in the field of building materials, can solve problems such as fluctuations in raw material composition, affecting product performance, and complex composition, and achieve the effects of strong freeze-thaw resistance, high production efficiency, and high flexural strength

Inactive Publication Date: 2016-12-14
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two problems in this method, first: the composition of the three raw materials is relatively complex, and the composition of the raw materials is prone to fluctuations, which affects product performance; second, the formed bricks need to be cured for 3 to 5 days, which is a long cycle and low efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The present embodiment provides a kind of method for preparing permeable brick, it comprises the following steps:

[0038] (1) In parts by weight, 40 parts of blast furnace slag with a particle size of 20 mesh, 55 parts of sludge with a water content of 35%, and 5 parts of dolomite with a particle size of 60 mesh are added with water, mixed with a mixer to obtain a mixture, and mixed The water content of the material is controlled at 15%;

[0039](2) Move the mixture obtained in step (1) to a hydraulic brick making machine, pressurize and form it by a forming die, and the forming pressure is 20MPa to obtain a permeable brick body;

[0040] (3) drying the permeable brick body obtained in step (2) at 120°C, so that the water content of the permeable brick body is 3%;

[0041] (4) Move the permeable brick body treated in step (3) to the kiln for sintering. The method of sintering is: raise the furnace temperature to 400°C at a heating rate of 5°C / min, keep it warm for 0.5...

Embodiment 2

[0043] The present embodiment provides a kind of method for preparing permeable brick, it comprises the following steps:

[0044] (1) In parts by weight, 50 parts of blast furnace slag with a particle size of 30 mesh, 40 parts of sludge with a water content of 40%, and 10 parts of dolomite with a particle size of 80 mesh are added with water, mixed with a mixer to obtain a mixture, and mixed The moisture content of the material is controlled at 10%;

[0045] (2) Move the mixture obtained in step (1) to a hydraulic brick making machine, pressurize and form it by a molding die, and the molding pressure is 25MPa to obtain a permeable brick body;

[0046] (3) drying the permeable brick body obtained in step (2) at 100°C so that the water content of the permeable brick body is 2%;

[0047] (4) Move the permeable brick body treated in step (3) to the kiln for sintering. The method of sintering is: raise the furnace temperature to 400°C at a heating rate of 5°C / min, keep it warm for...

Embodiment 3

[0049] The present embodiment provides a kind of method for preparing permeable brick, it comprises the following steps:

[0050] (1) In parts by weight, 60 parts of blast furnace slag with a particle size of 40 mesh, 25 parts of sludge with a water content of 45%, and 15 parts of dolomite with a particle size of 100 mesh are added with water, mixed with a mixer to obtain a mixture, and mixed The moisture content of the material is controlled at 12%;

[0051] (2) Move the mixture obtained in step (1) to a hydraulic brick making machine, pressurize and form it by a molding die, and the molding pressure is 15MPa to obtain a permeable brick body;

[0052] (3) drying the permeable brick body obtained in step (2) at 90°C so that the water content of the permeable brick body is 1%;

[0053] (4) Move the permeable brick body treated in step (3) to the kiln for sintering. The method of sintering is: raise the furnace temperature to 400°C at a heating rate of 5°C / min, keep it warm for...

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Abstract

The invention belongs to the field of building materials, and particularly relates to an environment-friendly water-permeable brick prepared with blast furnace slag and sludge as main materials and a preparation method of the environment-friendly water-permeable brick. The environment-friendly water-permeable brick is prepared from, by weight, 40-60 parts of blast furnace slag with the particle size of 20-40 meshes, 25-55 parts of sludge with the organic matter content smaller than 1% and 5-15 parts of dolomite. The preparation method of the water-permeable brick includes the following steps that 1, water is added to blast furnace slag, sludge and dolomite for mixing, and a mixture is obtained; 2, the mixture obtained in the step 1 is transferred to a brick making machine and subjected to pressure forming, and a water-permeable brick blank is obtained; 3, the water-permeable brick blank obtained in the step 2 is dried; 4, the water-permeable brick blank treated in the step 3 is transferred to a kiln to be sintered and then cooled to the normal temperature in the kiln, and the water-permeable brick is obtained. The water-permeable brick is simple in raw material composition and low in cost, has the advantages of being good in water permeability, high in rupture strength and the like, and has great application value.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an environment-friendly permeable brick prepared from blast furnace slag and sludge as main materials and a preparation method thereof. Background technique [0002] Blast furnace slag is a kind of metallurgical waste slag discharged from the ironmaking blast furnace in the process of iron and steel metallurgy. [0003] However, with the rapid development of the economy, people's demand for mineral resources is also increasing. The development of a large number of mineral resources has brought abundant material raw materials, but also produced a large amount of tailings. Depending on the grade of the ore, 0.3 to 1 ton of blast furnace slag can be discharged for every ton of iron smelted, and the lower the grade of the ore, the greater the amount of slag discharged. With the continuous rapid growth of China's economy, the use of steel is also increasing ye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B33/132C04B33/138C04B33/13
CPCC04B33/131C04B33/1321C04B33/138C04B38/0685C04B2235/442C04B2235/96Y02P40/60
Inventor 王习东朱孟广王昊王绍鑫刘丽丽
Owner PEKING UNIV
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