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Building material manufactured by mud as raw material and preparation method thereof

A technology of building materials and raw materials, applied in the field of building materials and their preparation, can solve the problems of lower overall efficiency, the inability of large-scale development and utilization of sludge natural resources, and difficulties in actual use, etc.

Inactive Publication Date: 2006-06-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The primary obstacle to the use of sludge as a building material is that the heavy metals in the sludge are not easily removed or solidified, because during the sintering process of using sludge as a raw material to prepare building materials, the transformation of heavy metal elements in the material is It is a very complicated process, which may occur the combination of particles, the condensation and diffusion of gaseous metals on the surface of particles, or the concretion of metal vapor when it is cooled, and the chemical reactions between heavy metals or between heavy metal elements and other elements. It is related to the nature and the state of the atmosphere in the sintering furnace. Therefore, even if people try to use sludge as a raw material to make building materials, they cannot be used because the heavy metals in the sludge are easy to precipitate. Therefore, sludge as a natural resource Has not been able to be developed and utilized on a large scale
Chinese patent application No. 02116671 discloses a "construction material made from mercury sludge conversion treatment and its preparation method". In addition to sludge, raw materials also need to use high-cost sand and a large amount of catalytic coagulant, so the overall cost of building materials is relatively high, and there are difficulties in practical use; in addition, it takes a long time to prepare building materials with the preparation method of this application long, so the overall efficiency is reduced; at the same time, the application is mainly mercury sludge, and it has no application value for sludge containing a large amount of other heavy metal components

Method used

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  • Building material manufactured by mud as raw material and preparation method thereof
  • Building material manufactured by mud as raw material and preparation method thereof
  • Building material manufactured by mud as raw material and preparation method thereof

Examples

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specific Embodiment approach 1

[0005] Specific implementation mode 1: This implementation mode is a kind of building material made of sludge as raw material. The building material is prepared from three raw materials: dry sludge, clay and binder. The addition amount of each raw material is respectively: The clay accounts for 80-150% of the dry sludge mass, and the binder accounts for 5-30% of the dry sludge mass; after mixing the raw materials according to the stated ratio, they are fired at 700-1100°C for 10-30 minutes; Described binding agent is water glass; Its preparation method comprises the following steps successively:

[0006] a. Dry, crush and screen the sludge;

[0007] b. Add clay accounting for 80-150% of the dry sludge mass and water glass accounting for 5-30% of the dry sludge mass as a binder, mix it with the dry sludge evenly, inject it into the mold, and vibrate and extrude;

[0008] c. Sintering: first dry and preheat the molding material to fully remove the moisture; then bake at 700-110...

specific Embodiment approach 2

[0010] Specific embodiment two: This embodiment is a kind of building material made of sludge as raw material. The building material is prepared from three kinds of raw materials: dry sludge, clay and binder. The addition amount of each raw material is respectively: The clay accounts for 300-400% of the mass of the dry sludge, and the binder accounts for 10-20% of the mass of the clay; after mixing the raw materials according to the stated proportions, they are fired at 900-1200°C for 15-35 minutes, and the adhesive Binder is water glass; Its preparation method comprises the following steps successively:

[0011] a. Dry, crush and screen the sludge;

[0012] b. Add clay accounting for 300-400% of the mass of the dry sludge and water glass accounting for 10-20% of the mass of the clay as a binder, mix it evenly with the dry sludge, inject it into the mold, and vibrate and extrude;

[0013] c. Sintering: first dry and preheat the molding material to fully remove the moisture; t...

specific Embodiment approach 3

[0015] Specific embodiment three: In the building materials of this embodiment, the addition amount of each raw material is respectively: clay accounts for 100% of the mass of dry sludge, and binder accounts for 10% of the mass of dry sludge; each raw material is mixed according to the stated ratio Finally, it was fired at 900°C for 30 minutes.

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Abstract

A building material for house, road, bridge, etc is prepared from sludge through drying, breaking, sieving, proportionally mixing it with clay and adhesive, shaping, sintering and cooling.

Description

technical field [0001] The invention relates to a building material and a preparation method thereof. Background technique [0002] Now, as a natural resource, sludge has not been effectively used; on the contrary, people need to add additional costs to dispose of the sludge generated in the water treatment process, which increases people's labor burden and economic burden. The primary obstacle to the use of sludge as a building material is that the heavy metals in the sludge are not easily removed or solidified, because during the sintering process of using sludge as a raw material to prepare building materials, the transformation of heavy metal elements in the material is It is a very complicated process, which may occur the combination of particles, the condensation and diffusion of gaseous metals on the surface of particles, or the concretion of metal vapor when it is cooled, and the chemical reactions between heavy metals or between heavy metal elements and other elemen...

Claims

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Application Information

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IPC IPC(8): C04B18/30B09B3/00C04B14/10
CPCY02W30/91
Inventor 许国仁李圭白邹金龙
Owner HARBIN INST OF TECH
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