Sludge brick heavy metal curing agent, sludge brick and preparation method of sludge brick

A curing agent and heavy metal technology, which is applied in the production of clay products, other household utensils, ceramic materials, etc., can solve the problems of complex composition of heavy metal elements, unreasonable control of sintering temperature, long processing cycle, etc., and achieve stable curing effect and high curing effect Visible, stable effect

Active Publication Date: 2021-07-23
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Single mixing of materials such as clay or shale in the sludge has no obvious effect on the solidification and stabilization of heavy metal ions
Due to the complex composition of heavy metal elements in sludge, unreasonable control of sintering temperature or too short duration of high temperature is not ideal for the solidification of heavy metal ions, and heavy metal ions are still leached
Since burning sludge ash needs to consume a lot of other resources, and the treatment cycle is long, the cost of building materials for the preparation of sludge ash in the later stage is high, which is not in line with economic principles

Method used

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  • Sludge brick heavy metal curing agent, sludge brick and preparation method of sludge brick
  • Sludge brick heavy metal curing agent, sludge brick and preparation method of sludge brick
  • Sludge brick heavy metal curing agent, sludge brick and preparation method of sludge brick

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preparation example Construction

[0049] Based on the same inventive concept, the present invention also provides a method for preparing sludge bricks, comprising the following steps:

[0050] (1) Prepare the following raw materials according to the parts by mass:

[0051] Base material: 100 parts;

[0052] Water: 17-22 parts;

[0053] Main curing agent as mentioned above: 8 parts;

[0054] Auxiliary curing agent as mentioned above: 1 to 3 parts;

[0055] Wherein, the base material includes sludge, clay and fly ash, and the mass-number ratio of the sludge, clay and fly ash is 1:0.5-8.5:0.1-2.5.

[0056] (2) Pour sludge, clay, and fly ash into the container and stir evenly to form a base material mixture;

[0057] (3) Add the main curing agent and the auxiliary curing agent in the container, add water and stir evenly and place it to form the required mixed mud for preparing sludge bricks;

[0058] (4) aging the mixed mud in a sealed bag;

[0059] (5) The aged mixed mud material is packed into a mold and pre...

Embodiment 1

[0075] Weigh the dry pulverized sludge, clay and fly ash as the base material, wherein the mass ratio of sludge, clay and fly ash is 1:1.33:0.67, based on the dry basis weight of the base material, weigh The tap water of amount 17~22% by weight.

[0076] Taking the dry basis weight of the base material as a basis, take by weighing 8% of the main curing agent by weight, and take by weighing 1% of the auxiliary curing agent by weight; wherein in the main curing agent, CaO and SiO 2 The mass-to-number ratio is 0:8.

[0077] Pour the weighed sludge, clay, and fly ash into a container and stir evenly to form a base material mixture.

[0078] Add the main curing agent and auxiliary curing agent into the container, stir again, add water, stir evenly and place it to form the mixed mud required for preparing sludge bricks.

[0079] Put the mixed sludge into a sealed bag for aging.

[0080] Put the aged mud into the mold, press it under the press, and disassemble the mold.

[0081] ...

Embodiment 2

[0084] Same as Example 1, the difference is only in the content of heavy metal curing agent for sludge bricks. In this embodiment, take the dry basis weight of the base material as a benchmark, weigh 8% by weight of the main curing agent, and take by weighing 1.5% by weight of the auxiliary curing agent , where CaO and SiO in the curing agent 2 The mass-to-number ratio is 1:7.

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Abstract

The invention discloses a sludge brick heavy metal curing agent which comprises the following components in parts by mass: 8 parts of a main curing agent and 1-3 parts of an auxiliary curing agent. The invention also provides a preparation method of the sludge brick. The preparation method comprises the following steps: preparing raw materials, adding water, uniformly stirring, standing, aging, filling aged mixed mud into a mold, carrying out compression molding, and drying and firing a sludge brick test block. The invention also provides the sludge brick which is prepared by the preparation method of the sludge brick. By adopting the technical scheme, the problems of large land occupation, possible secondary pollution, long treatment period and the like in sludge treatment can be effectively solved; the sludge brick heavy metal curing agent has a curing effect on heavy metal elements of various sludge bricks, and the treatment effect is stable.

Description

technical field [0001] The invention relates to a heavy metal curing agent for sludge bricks, a sludge brick and a preparation method for the sludge brick, and belongs to the technical fields of environmental protection and engineering construction such as sludge resource utilization, reduction and harmlessness. Background technique [0002] With the rapid economic development of various countries and the implementation of environmental protection policies, the treatment capacity and treatment level of urban sewage treatment plants have been greatly improved, and the subsequent urban sludge output has also increased rapidly, which has also brought urban sludge disposal. It's a big challenge. The commonly used methods in the process of municipal sludge disposal are sludge sanitary landfill and sludge incineration. Sludge sanitary landfill and sludge agricultural use are easy to pollute groundwater resources due to the poor stability of sludge itself, and the odorous gas emit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/135C04B33/132C04B33/13C04B33/04
CPCC04B33/1321C04B33/131C04B33/04C04B33/1352C04B2235/6567C04B2235/661C04B2235/96Y02P40/60
Inventor 赵瑞斌徐鹏张彦吕丽君李笃铖耿祥辉张竹慧
Owner TIANJIN CHENGJIAN UNIV
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