Method for resource utilization of dephosphorizing sludge

A technology of recycling and sludge, applied in the field of resource utilization of dephosphorization sludge, can solve problems such as groundwater pollution, waste of resources, and pollution of the environment, and achieve the effects of reducing environmental pollution, avoiding pollution, and ensuring quality and environmental safety.

Inactive Publication Date: 2010-07-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Red mud is the waste residue produced by the alumina industry, which belongs to one of the three wastes; it not only occupies land, pollutes the environment, but also causes groundwater pollution and waste of resources

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0019] A method for resource utilization of dephosphorized sludge, which includes the following steps:

[0020] 1) Dry the dephosphorized sludge after the treatment of high-phosphorus hematite beneficiation wastewater to a moisture content of 5% (mass), grind, pass through a 20-mesh sieve, and remove the sieve material to obtain powdered dephosphorized sludge; Grind the high-phosphorus hematite tailings, pass a 20-mesh sieve, and remove the sieve to obtain powdered high-phosphorus hematite tailings; standby;

[0021] 2) Measure the moisture content of each raw material (that is, powdered dephosphorized sludge, powdered high-phosphorus hematite tailings) after sieving, and then press the powdered dephosphorized sludge and powdered high-phosphorus hematite tailings The mass ratio of dry weight (that is, no water content) is 3:2, take powdered dephosphorization sludge and powdered high-phosphorus hematite tailings, put them in a mixer and stir, while slowly adding water, water (tap wa...

Embodiment 2

[0026] A method for resource utilization of dephosphorized sludge, which includes the following steps:

[0027] 1) Dry the dephosphorized sludge after the treatment of high-phosphorus hematite beneficiation wastewater to a moisture content of 10% (mass), grind, pass through a 20-mesh sieve, and remove the sieve materials to obtain powdered dephosphorized sludge; Grind the high-phosphorus hematite tailings, sieving through a 20-mesh sieve, and take the material off the sieve to obtain powdered high-phosphorus hematite tailings; standby;

[0028] 2) Measure the moisture content of each raw material (that is, powdered dephosphorized sludge, powdered high-phosphorus hematite tailings) after sieving, and then press the powdered dephosphorized sludge and powdered high-phosphorus hematite tailings The mass ratio of dry weight (ie no water content) is 1:2, take the powdered dephosphorization sludge and powdered high-phosphorus hematite tailings, put them in a mixer and stir, while slowly a...

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Abstract

The invention relates to a method for resource utilization of solid wastes, in particular to a method for resource utilization of dephosphorizing sludge, which is characterized in that the method comprises the following steps: grinding dephosphorizing sludge which is processed by high phosphorus hematite ore-dressing wastewater to 20 meshes, taking undersize materials to obtain powdery high phosphorus hematite tailings, and standby application; (2) respectively measuring the moisture content of the sieved raw materials, and then taking powdery dephosphorizing sludge and powdery high phosphorus hematite tailings according to the dry weight mass ratio (1-3):2 between the powdery dephosphorizing sludge and the powdery high phosphorus hematite tailings; (2) placing the powdery dephosphorizing sludge and the powdery high phosphorus hematite tailings into a blender for mixing, simultaneously adding water, the addition of water being 10%-12% of the sum of the powdery dephosphorizing sludge and the powdery high phosphorus hematite tailings, and mixing for 4-6 minutes to obtain mixture; (3)compression molding; and (4) baking to form backed bricks. The method is characterized by high waste utilization, simple technological operation, low cost and high product strength.

Description

Technical field [0001] The invention relates to a resource utilization method of solid waste, in particular to a resource utilization method of dephosphorized sludge after treatment of high-phosphorus hematite beneficiation wastewater. Background technique [0002] Hematite tailings are solid materials that are discarded after the raw ore mined from hematite mines are recovered by beneficiation or other processes to recover useful components. It is in fine powder with a particle size of 0.15mm or less. It is generally stored in tailings ponds. An important part of industrial solid waste. At present, with the expansion of mine scale and the extension of mining history, the massive production and accumulation of tailings has brought serious pollution and harm to people's production, life and ecological environment. Tailings treatment in my country mainly includes methods for producing magnetized compound fertilizer, building products, and Portland cement. Researchers have used he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/18E04C1/40C04B33/132
CPCY02P40/60
Inventor 夏世斌张一敏张义
Owner WUHAN UNIV OF TECH
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