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Method for producing brick from oil sludge and coal gangue

A technology of coal gangue and oil sludge, which is applied in the field of brick production, can solve the problems of water body, atmospheric environment pollution, accumulation and occupation of land, etc., and achieve the effects of protecting the environment, saving energy, and reducing the leachability of harmful substances.

Inactive Publication Date: 2010-11-24
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The discharged coal gangue not only accumulates and occupies land, but also causes serious environmental pollution to water bodies and the atmosphere.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Based on the total mass of the brick body, its components and mass percentages are 15% oil sludge, 25% coal gangue, 50% clay, 8% water and 2% modifying additives.

[0015] The oil sludge is oilfield scum oil sludge containing 29% of oil and 66% of water.

[0016] The components and mass percentages of the modified additive are respectively 40% of calcium oxide, 25% of ferric oxide, 15% of sodium phosphate and 20% of polystyrene calcium sulfonate.

[0017] The production method is as follows: Stir the oil sludge, coal gangue, clay and modified additives in the mixing equipment evenly and crush them with a wheel roller, then add water and stir evenly again, and extrude the above-mentioned mixture with a hydraulic or extrusion brick making machine. Press into bricks of different shapes and sizes, dry the bricks naturally or by using the waste heat of the roasting kiln to keep the moisture content of the bricks at 10%, and sinter the dried bricks at 1000°C for 3 hours to ge...

Embodiment 2

[0019] Based on the total mass of the brick body, its components and mass percentages are 18% oil sludge, 28% coal gangue, 41.5% clay, 10% water and 2.5% modifying additives.

[0020] The sludge is an oilfield tank bottom sludge with an oil content of 34% and a water content of 61%.

[0021] The components and mass percentages of the modified additive are respectively 42% of calcium oxide, 23% of ferric oxide, 16% of sodium phosphate and 19% of polystyrene calcium sulfonate.

[0022] The production method is as follows: Stir the oil sludge, coal gangue, clay and modified additives in the mixing equipment evenly and crush them with a wheel roller, then add water and stir evenly again, and extrude the above-mentioned mixture with a hydraulic or extrusion brick making machine. Press into bricks of different shapes and sizes, dry the bricks naturally or by using the waste heat of the roasting kiln to keep the moisture content of the bricks at 13%, and sinter the dried bricks at a ...

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Abstract

The invention relates to a method for producing a brick from oil sludge and coal gangue as raw materials. The brick comprises the following components in percentage by weight: 10 to 20 percent of oilfield oil sludge, 10 to 30 percent of coal gangue, 40 to 65 percent of clay, 5 to 20 percent of water and 0.5 to 3 percent of modifying additive. The method comprises the following steps of: stirring the components uniformly in a stirring device to form a semi-finished brick blank, and drying and roasting the brick blank to form a finished product of the brick. By combining an internal combustion process for manufacturing the brick by sintering and making full use of heat values of the oil sludge and the coal gangue, the method reduces external fuels during roasting, saves a large amount of energy, meanwhile solves the treatment problem of the oil sludge and the coal gangue, and protects the environment. The brick manufacturing method is simple, has low cost, realizes reduced, harmless and recycling requirements of solid waste treatment, and has good market prospect and popularization value.

Description

Technical field: [0001] The invention relates to a recycling technology of solid waste, in particular to using oil sludge and coal gangue as raw materials to produce bricks. Background technique: [0002] Oil sludge is one of the main pollution sources of oil production, and it is also a major problem affecting the quality of oil fields and surrounding environments. The composition of oil sludge is extremely complex, mainly composed of three parts: water, sediment and oil. The three parts are in a very stable suspended emulsification state, and contain a large amount of additives and various toxic and harmful substances. It has been listed as hazardous solid waste at present. . As most oilfields enter the mid-to-late stage of production, the water content in the produced oil is getting higher and higher, and the output of oil sludge will continue to increase. [0003] Coal gangue is one of the largest industrial wastes in my country. It is a solid waste discharged in the p...

Claims

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Application Information

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IPC IPC(8): C04B33/132
CPCY02P40/60
Inventor 高洪阁张大松王涛
Owner SHANDONG UNIV OF SCI & TECH
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