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Method of preparing ceramic granules with solid wastes

A technology of ceramsite and sludge powder, which is applied in applications, household utensils, clay products, etc., can solve the problems of secondary pollution of heavy metals, and achieve the effects of industrial scale production, low energy consumption, and easy reaction conditions

Inactive Publication Date: 2018-12-18
长沙埃比林环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are great disadvantages in various treatment methods. Throwing into the sea will cause environmental problems such as red tide due to the N and P contained in the sludge; incineration is like burning garbage to produce SO 2 , dioxin and other harmful gases and heavy metal dust; landfill and land use also cause secondary pollution such as heavy metals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The urban dewatered sludge is dried by blowing air, and then ground to obtain sludge powder with a particle size of 30-150 μm; the sludge powder is mixed with clay and steel slag at a ratio of 5:2:1 to obtain primary Mixture; adding water to the primary mixture, adding 3% lime powder, and pressing into pellets, the pellets have a moisture content of 10%. The pellets were dried at a drying temperature of 80° C., and then fired at a firing temperature of 1000° C. for 40 minutes, and then cooled by natural cooling to obtain ceramsite.

Embodiment 2

[0023] The urban dewatered sludge is dried by blowing air, and then ground to obtain sludge powder with a particle size of 30-150 μm; the sludge powder is mixed with clay and steel slag at a ratio of 5.5:2.5:1.5 to obtain primary Mixture; adding water to the primary mixture, adding 3% lime powder, and pressing into pellets, the pellets have a moisture content of 10%. The pellets were dried at a drying temperature of 85° C., and then fired at a firing temperature of 1100° C. for 45 minutes, and then cooled by natural cooling to obtain ceramsite.

Embodiment 3

[0025] The urban dewatered sludge is dried by blowing air, and then ground to obtain sludge powder with a particle size of 30-150 μm; the sludge powder is mixed with clay and steel slag at a ratio of 6:3:2 to obtain primary Mixture; adding water to the primary mixture, adding 3% lime powder, and pressing into pellets, the pellets have a moisture content of 10%. The pellets were dried at a drying temperature of 90° C., and then fired at a firing temperature of 1200° C. for 50 minutes, and then cooled by natural cooling to obtain ceramsite.

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PUM

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Abstract

The invention relates to a method of preparing ceramic granules with solid wastes, which includes: 1) drying dehydrated municipal sludge by blowing air and finely grinding the municipal sludge to obtain sludge powder; 2) mixing the sludge powder, clay and steel slag to obtain a primary mixture; 3) adding water to the primary mixture and adding lime powder, and compressing the mixture into pellets;3) drying and roasting the pellets and cooling the pellets in a natural cooling manner to produce the ceramic granules. By using the dehydrated municipal sludge and other wastes for preparing the ceramic granules, recycling utilization of the solid wastes is achieved. The method also avoids environmental pollution due to the solid wastes, is simple in process and is low in investment cost.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for preparing ceramsite by using solid waste. Background technique [0002] Ceramsite is a lightweight aggregate produced by foaming in a rotary kiln. It has a spherical shape, a smooth and hard surface, and a honeycomb inside, which has the characteristics of low density, low thermal conductivity and high strength. In the refractory industry, ceramsite is mainly used as aggregate of heat insulation refractory materials. [0003] The bulk density of ceramsite itself is less than 1100kg / m 3 , generally 300~900kg / m 3 . The density of concrete made of ceramsite as aggregate is 1100-1800kg / m 3 , the corresponding concrete compressive strength is 30.5 ~ 40.0Mpa. The biggest feature of ceramsite is that it is hard on the outside, but there are many micropores inside. These micropores give ceramsite its light weight. The density of No. 200 fly ash ceramsite concr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B33/138C04B33/132C04B33/04
CPCC04B33/04C04B33/1321C04B33/138C04B38/009C04B38/0645Y02P40/60
Inventor 不公告发明人
Owner 长沙埃比林环保科技有限公司
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