Preparing method of ceram site fully using biosolid and sludge

A technology of biological sludge and silt, which is applied in the field of making ceramsite and completely using biological sludge and silt to make ceramsite, can solve the problems that cannot be realized, and achieve the effects of low cost, good fire resistance, and good heat insulation performance

Active Publication Date: 2009-11-25
ZHEJIANG FANGYUAN BUILDING MATERIALS TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

But this method still adopts the clay (up to 71%-89%) of larger percentage by weight and

Method used

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  • Preparing method of ceram site fully using biosolid and sludge
  • Preparing method of ceram site fully using biosolid and sludge
  • Preparing method of ceram site fully using biosolid and sludge

Examples

Experimental program
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Example Embodiment

[0045] Example 1

[0046] Such as figure 1 As shown, the formula of river sludge and dewatered sludge was mixed uniformly according to the proportion of Example 1 in Table 7, and then placed for aging at room temperature for 7 days for partial dehydration. After dehydration, the water content of the river sludge and dewatered sludge was 41.5 %, put into the double-shaft mixer through the feeder for full mixing, the mixing time is 20 minutes; then the above-mentioned mixed biological sludge and sludge are crushed in a pair of roller crusher, the crushing time is 1 minute , After crushing, the second granulation is carried out. The first time is 4 minutes by the roller granulator, and the second time is 6 minutes by the granulating drum. After the second granulation, the particle size of the granules is 5- 15mm. Put the above-mentioned granulated pellets into a double-tube rotary kiln for preheating. The preheating temperature is 250℃ and the preheating time is 25 minutes. After pre...

Example Embodiment

[0047] Example 2-4: Mix the formula of river sludge and dewatered sludge according to the proportions of Example 2-4 in Table 7, and then place it for aging at room temperature for 7 days for partial dewatering. After dewatering, the river sludge and dewatered sludge are partially dewatered. The moisture content is 40-45%, and the other process flow is the same as that of Example 1, and will not be repeated.

Example Embodiment

[0048] Example 5

[0049] After mixing the piling sludge and dewatered sludge in the proportions of Example 5 in Table 7 evenly, it was placed at room temperature and aged for 7 days for partial dewatering. After dehydration, the water content of the river sludge and dewatered sludge was 34.2%. The feeder is put into a double-shaft mixer for full mixing, and the mixing time is 5 minutes; then the above-mentioned mixed biological sludge and sludge are crushed in a pair of roller crushers, and the crushing time is 5 minutes. Carry out secondary granulation, the first time is 6 minutes by roller to roller granulator, and the second time is 4 minutes by granulating drum. After the second granulation, the particle size of the pellets is 2-15mm.

[0050] Put the above granulated pellets into a double-tube rotary kiln for preheating, the preheating temperature is 400℃, the preheating time is 15 minutes; after preheating, the swelling is carried out, the swelling temperature is 1250℃, and...

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Abstract

This invention discloses a preparing method of ceram site fully using biosolid and sludge, including steps as follows: a, mixing materials; b, preparing particles; c, sintering at temperature of 1000-1300 degrees centigrade after pre-heating for 5-20 minutes; cooling at temperature of 50-200 degrees centigrade for 10-30 minutes after sintering, thereby preparing finished ceram site product. Accordingly, this invention makes effective use of urban mud, and changes industrial waste solid into valuable; further, this utilyit model is low in preparation cost and suitable for large-scaled production.

Description

technical field [0001] The invention relates to a method for making ceramsite, in particular to a method for making ceramsite completely by using biological sludge and silt. It belongs to the technical field of lightweight materials. Background technique [0002] Ceramsite has excellent properties, such as low density, high cylinder compressive strength, high porosity, high softening coefficient, good frost resistance, and excellent alkali-aggregate reactivity. Especially because of its low density, internal porosity, uniform shape and composition, and certain strength and firmness, ceramsite has multifunctional characteristics such as light weight, corrosion resistance, frost resistance, earthquake resistance and good insulation. Utilizing these excellent properties of ceramsite, it can be widely used in building materials, horticulture, refractory and thermal insulation materials, chemical industry, petroleum and other departments. The application fields are becoming wide...

Claims

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Application Information

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IPC IPC(8): C04B38/00B09B3/00
Inventor 杨晓华田生春童丽美
Owner ZHEJIANG FANGYUAN BUILDING MATERIALS TECH
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