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Method for preparing light ceramsite by adopting DSD acid industrial sludge

A light ceramsite and acid sludge technology, applied in the environmental field, can solve the problems of small particle density, large specific surface area, and low water absorption rate, and achieve the effect of large specific surface area, simple process, and low water absorption rate

Inactive Publication Date: 2010-02-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems existing in the treatment technology of the sludge produced in the existing DSD acid production process, and provides a simple and convenient method for preparing lightweight ceramsite using DSD acid industrial sludge. The prepared lightweight ceramsite has Small bulk density, small particle density, low water absorption, large specific surface area, etc.

Method used

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  • Method for preparing light ceramsite by adopting DSD acid industrial sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) The DSD acid sludge is dried, the clay is dried, and the two raw materials are crushed and screened with a 100-mesh sieve (particle diameter ≤ 0.15mm);

[0014] (2) The flux and expansion agent are sieved with a 300-mesh sieve (particle diameter ≤ 0.05mm);

[0015] (3) Take binder, flux, expansion agent and dry DSD acid sludge with the ratio of weight ratio 5: 0.5: 0.5: 4, granulate with water as binder in the drum granulator, Make raw meal balls with a diameter of about 5mm;

[0016] (4) Place the raw meal balls at room temperature and dry for 10 hours;

[0017] (5) Put the raw material balls into a box-type resistance furnace at 350°C, preheat for 15 minutes, quickly transfer to a tube-type resistance furnace at 1080°C and burn for 10 minutes, and cool the ceramsite at room temperature to obtain DSD acid sludge lightweight ceramsite.

[0018] The appearance of the prepared lightweight ceramsite is yellow spherical solid with rough surface, and the bulk density ...

Embodiment 2

[0020] (1) The DSD acid sludge is dried, and after the clay is dried, the two raw materials are crushed and screened with a 100-mesh sieve (particle diameter ≤ 0.15mm)

[0021] (2) The flux and expansion agent are sieved with a 300-mesh sieve (particle diameter ≤ 0.05mm);

[0022] (3) Take binder, flux, expansion agent and dry DSD acid sludge with the ratio of weight ratio 5: 0.5: 0.5: 5, carry out granulation with water as binder in the drum granulator, Make raw meal balls with a diameter of about 5mm;

[0023] (4) Dry the raw meal balls at room temperature for 13 hours;

[0024] (5) Put the raw material balls into a box-type resistance furnace at 365°C, preheat for 16 minutes, quickly transfer to a tube-type resistance furnace at 1100°C and burn for 12 minutes, and cool the ceramsite at room temperature to obtain DSD acid sludge lightweight ceramsite.

[0025] The appearance of the prepared lightweight ceramsite is yellow spherical solid with rough surface, and the bulk d...

Embodiment 3

[0027] (1) The DSD acid sludge is dried, and after the clay is dried, the two raw materials are crushed and screened with a 100-mesh sieve (particle diameter ≤ 0.15mm)

[0028] (2) The flux and expansion agent are sieved with a 300-mesh sieve (particle diameter ≤ 0.05mm);

[0029] (3) Take binder, flux, expansion agent and dry DSD acid sludge with the ratio of weight ratio 4: 0.5: 0.5: 5, carry out granulation with water as binder in the drum granulator, Make raw meal balls with a diameter of about 5mm;

[0030] (4) Place the raw meal balls at room temperature and dry for 15 hours;

[0031] (5) Put the raw material balls into a box-type resistance furnace at 385°C, preheat for 18 minutes, quickly transfer to a tube-type resistance furnace at 1110°C for 14 minutes, and place the ceramsite at room temperature to cool, and you can get DSD acid sludge lightweight ceramsite.

[0032] The appearance of the prepared lightweight ceramsite is yellow spherical solid with rough surfac...

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Abstract

The invention provides a method for preparing light ceramsite by adopting DSD acid industrial sludge, which is characterized in that the following raw materials are utilized in the method: DSD acid sludge, binders, fluxing agents and expanding agents. The method comprises the following steps: (1) respectively grinding the dried DSD acid sludge and the binders and sieving the substances with 100-mesh sieves; (2) sieving the fluxing agents and the expanding agents with 300-mesh sieves; (3) weighing the binders, the fluxing agents, the expanding agents and the dried DSD acid sludge in a weight ratio of 3-5:0.5:0.5:4-6 and pelletizing the substances in a drum-type pelletizer with water as an adhesive to prepare raw pellets with the diameter being about 5mm; (4) drying the raw pellets at normaltemperature; (5) placing the raw pellets into box-type resistance furnaces, transferring the raw pellets into tube-type resistance furnaces to be fired after preheating and cooling the ceramsite at room temperature, thus obtaining the DSD acid sludge light ceramsite. The method lowers the cost on sludge treatment, avoids environmental pollution and features simple preparation process. The prepared DSD acid sludge light ceramsite has the characteristics of light weight, low water absorption, large specific surface area and the like.

Description

technical field [0001] The invention relates to a method for firing light-weight ceramsite with DSD acid (4,4-diaminostilbene-disulfonic acid) industrial sludge, belonging to the field of environmental technology. Background technique [0002] The production process of DSD acid includes three stages of sulfonation, oxidation and reduction. A kind of refractory organic wastewater will be produced in the reduction process, and the method of Fenton oxidation + flocculation is used to treat the wastewater, and a large amount of sludge is produced in the flocculation process. Due to the decomposition in the oxidation stage, most of the sludge is refractory organic matter. At present, most enterprises choose to pile up and discharge the sludge directly, which not only occupies a large amount of land, but also the refractory organic matter in the sludge will always remain in the environment, causing secondary pollution. Contents of the invention [0003] The present invention a...

Claims

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Application Information

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IPC IPC(8): C04B33/00C04B33/132C04B38/00
CPCY02P40/60
Inventor 岳钦艳高悦齐元峰吴苏清吴春松高宝玉
Owner SHANDONG UNIV
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