Method for preparing porcelain granule from waste paper-making sludge

A technology for making paper and sludge from waste paper is applied in the field of solid waste treatment and disposal, which can solve the problems of air pollution, groundwater resource pollution, and high energy consumption, and achieve the effects of reducing energy consumption, high yield, and saving clay resources.

Inactive Publication Date: 2009-03-18
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If incineration is used, it will not only pollute the atmosphere, but also consume a lot of energy; if it is buried, it will pollute groundwater resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 0.3 kg of glutaraldehyde was mixed into 60 kg of waste paper sludge (dry weight) for pretreatment. The obtained waste paper papermaking sludge and 40 kg of clay were mixed with a twin-shaft mixer, and then the sludge was smelted and rolled into a spherical ceramsite body with a diameter of 5 mm. After drying, it was fired in a comb kiln at room temperature. The heating rate to 600°C is 2°C / min, the sintering temperature from 600°C is 10°C / min, the maximum sintering temperature is 1250°C for 5 hours, the maximum sintering temperature is 10°C / min to room temperature, and the building light aggregate is obtained. The finished products of ceramsite were tested, and the results are shown in Table 1.

Embodiment 2

[0031] 0.12 kg of sodium hypochlorite was mixed into 24 kg of waste paper sludge (dry weight) for pretreatment. Mix the obtained waste paper and paper sludge, 38 kg of tailings sludge and 38 kg of fly ash coarse slag with a twin-shaft mixer, and then form it into a spherical ceramsite body with a diameter of 5 mm through smelting and rolling. After drying, put Firing in a comb kiln, heating rate is 2°C / min from room temperature to 600°C, 10°C / min from 600°C to sintering temperature, heat preservation at the highest sintering temperature of 1050°C for 4 hours, cooling rate from the highest sintering temperature to room temperature is 10°C / min to obtain the finished products of ceramsite for construction lightweight aggregate, and they are tested, and the results are shown in Table 1. Example 3:

Embodiment 3

[0032] 0.165 kg of sodium hypochlorite was mixed into 33 kg of waste paper sludge (dry weight) for pretreatment. Mix the obtained waste paper and papermaking sludge, 45 kg of tailings sludge and 22 kg of fly ash coarse slag with a twin-shaft mixer, and then form it into a spherical ceramsite body with a diameter of 5 mm through smelting and rolling. After drying, Put it into a comb kiln for firing, the heating rate is 2°C / min from room temperature to 600°C, 10°C / min from 600°C to sintering temperature, keep at the highest sintering temperature of 1100°C for 4 hours, and the cooling rate from the highest sintering temperature to room temperature is 10°C °C / min to obtain finished ceramsite products for building lightweight aggregates, and inspect them. The results are shown in Table 1.

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Abstract

The invention provides a method for preparing porcelain granules by waste paper making sludge, which belongs to the technical field of solid waste treatment and disposal. The method comprises the following steps: mixing and milling, or mixing and granulating the waste paper making sludge, clay and pulverized fuel ash into spherical blank granules; and drying and sintering the spherical blank granules at a temperature of between 1,000 and 1,250 DEG C to produce a porcelain granule product. The method solves the problem of treating mass sludge produced by waste paper making, so that waste materials can be reasonably recycled, and the clay in fragmental stone chippings during the process of crushing construction aggregate can also be recycled, thereby solving the problems of occupying farmland, saving clay resource, and having certain significance for environmental protection. The method has the advantages of simple process and low cost, and is suitable for mass industrial production. The product produced by the method has high rate of finished products and wide application range. The light porcelain granules obtained by the porcelain granule preparation method have the advantages of standard dimension, easy graduation, and accord with national standard in pressure resistance and other indexes.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and disposal, and in particular relates to a method for preparing ceramsite with waste paper papermaking sludge. Background technique [0002] my country's construction industry has a huge demand for lightweight sintered ceramsite. At the same time, in my country's urban residents and industrial sewage treatment, there is a large demand for ceramsite filter materials used as filter fillers for water treatment devices. Conventional ceramsite processing is to use the clay excavated from the farmland, granulate and sinter, resulting in a large loss of soil resources and a serious phenomenon of field destruction. [0003] Paper has been widely used in various fields, but the large amount of sludge produced by the paper industry has brought serious pollution to the environment. With the increasingly stringent national environmental protection policies, how to dispose of the huge amount o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132
CPCY02P40/60
Inventor 樊传刚王健吴日铭范晓鸣张广虎
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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