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Preparation method of sintered water permeable brick

A technology of permeable bricks and cohesion, which is applied in the field of preparation of sintered permeable bricks. It can solve the problems of not being able to solve the problems of raw materials, unstable physical properties of products, and difficulty in uniform dispersion of sawdust, so as to protect mineral resources and ecology. environment, improving the water environment of Taihu Lake, and improving the effect of urban water cycle

Inactive Publication Date: 2013-10-02
JIANGSU CN ECO MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the durability of this kind of permeable brick is greatly improved compared with unburned bricks, the riverbed sediment used by it is roughly the same as the Taihu sludge, but because the sawdust is difficult to disperse evenly during the mixing process, it is easy to cause batches The instability of the physical properties of the product during the production process
In addition, since the sawdust exists in the state of individual particles, such permeable bricks tend to form closed discontinuous holes after firing, resulting in a decrease in the actual water permeability
[0009] None of the above technical solutions can solve the problem of using Taihu Lake silt as a raw material for permeable bricks, and needs to be improved

Method used

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  • Preparation method of sintered water permeable brick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: First take some Taihu Lake silt for natural drying and crushing treatment, pass through a 40-mesh sieve, add water to the Taihu Lake mud powder (the particle formula is according to the ratio of #1 in Table 1), and the water content is 10-20 wt%. Then use an extrusion granulator to granulate (4-24 mesh), and then burn the particles at 850-1200 °C after drying. Take the fired particles and Taihu Lake sludge powder, glass powder, calcite, talc, lithium feldspar, dry powder binder, etc., weigh them according to the ratio of Example 1 in Table 2, and use a mixer to mix them evenly to make a moisture content 2-5 wt% of the mixture, and then dry-pressed with a dry-press molding machine. After forming, the semi-finished bricks enter the drying kiln for drying (the drying cycle is 180 min, the maximum temperature is ≤180 °C), and the moisture content of the body after drying is less than 1 wt%, and then enter the tunnel kiln for firing (the maximum temperature is 118...

Embodiment 2

[0025] Embodiment 2: First take some Taihu Lake silt and carry out natural drying and crushing treatment, pass through a 40-mesh sieve, mix Taihu Lake mud powder with bauxite, lithium lithium feldspar, etc. and add water to refine the mud (the particle formula is according to the ratio of #2 in Table 1 carried out), the moisture content is 10-20 wt%. Then use an extrusion granulator to granulate (4-24 mesh), and then burn the particles at 850-1200 °C after drying. Take the fired particles and Taihu Lake sludge powder, glass powder, calcite, talc, lithium feldspar, dry powder binder, etc., weigh them according to the ratio of Example 2 in Table 2, and use a mixer to mix them evenly to make a moisture content 2-5 wt% of the mixture, and then dry-pressed with a dry-press molding machine. After forming, the semi-finished bricks enter the drying kiln for drying (the drying cycle is 180 min, the maximum temperature is ≤180 °C), and the moisture content of the body after drying is l...

Embodiment 3

[0026] Embodiment 3: first take some Taihu Lake silt and carry out natural drying and crushing treatment, pass through a 40-mesh sieve, mix Taihu Lake mud powder with bauxite, lithium lithium feldspar, etc., and add water to refine the mud (the particle formula is according to the ratio of #3 in Table 1 carried out), the moisture content is 10-20 wt%. Then use an extrusion granulator to granulate (4-24 mesh), and then burn the particles at 850-1200 °C after drying. Take the fired particles and Taihu Lake sludge powder, glass powder, calcite, talc, lithium feldspar, dry powder binder, etc., weigh them according to the ratio of Example 3 in Table 2, and use a mixer to mix evenly to make a moisture content 2-5 wt% of the mixture, and then dry-pressed with a dry-press molding machine. After forming, the semi-finished bricks enter the drying kiln for drying (the drying cycle is 180 min, the maximum temperature is ≤180 °C), and the moisture content of the body after drying is less ...

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Abstract

The invention discloses a preparation method of a sintered water permeable brick. The method comprises the following steps of: pre-processing raw materials, drying, crushing and pelleting, adding caking powder to manufacture mixed powder, compression moulding, and finally sintering, wherein the main raw material is sludge in Taihu Lake, and the pre-processing comprises the following steps of: a, excavating the sludge in Taihu Lake, drying and crushing the sludge, sieving in a 40-mesh sieve; b, sufficiently mixing 50-10wt% of sludge in Taihu Lake, 0-30wt% of bauxite, 0-20wt% of lithium feldspar in proportion, adding water, manufacturing the uniformly mixed pug with water content of 10-20wt%, pelleting by using a pelleting machine, wherein the granularity is 4-24 meshes; c, after moulding the particle, drying and then sintering, wherein the sintering temperature is 850-1200 DEG C, and the sintering time is 180min. By specially pre-processing the sludge in Taihu Lake, the subsequent pressing and high-temperature sintering can be performed to manufacture the water permeable brick, the water permeable brick is high in strength, and high in water permeable speed; and the dual purposes of recycling the sludge in Taihu Lake and improving the urban ecological environment is realized.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to an environment-friendly ceramic permeable brick, in particular to a preparation method of a sintered permeable brick. Background technique [0002] In recent years, the water environment problem of Taihu Lake has become more and more serious, and the endogenous pollution of lake silt has become one of the main factors that aggravate the eutrophication process of water body. Taihu Lake silt mainly includes particulate matter contained in the lake water, sediment carried by surface runoff, and animal and plant residues. If such a large amount of silt cannot be disposed of in a timely and reasonable manner, the water environment of Taihu Lake will continue to deteriorate, occupy a large amount of land, and cause secondary pollution, and the heavy metals contained in the silt will easily cause harm to the ecological environment and human health. In the process of ecological ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B38/00
Inventor 单小兵徐锐锋
Owner JIANGSU CN ECO MATERIALS CO LTD
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