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Method for preparing building block sintered from oil field mud

A technology for oilfield sludge and building blocks, which is applied in the manufacture of tools, clay products, and removal of solid waste. It can solve problems such as soil and water environmental pollution, achieve large processing capacity, eliminate pollution, and reduce sintering costs.

Inactive Publication Date: 2005-08-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Open-air stacking and landfill treatment have caused serious pollution to the local soil and water environment, so oily sludge has become a heavy burden for oil companies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]

[0026] After the above clay and oilfield sludge are pulverized, the weight ratio is 70:30, and a brick and tile binder of 0.2% of the total weight of clay and oilfield sludge is added, which can improve the strength of the sample and reduce shrinkage rate and cracks. The materials are mixed by means of stirring, and water is added while stirring until the water content of the mixture is 7.5-8.5%. After uniform mixing, the mixture is placed in a sealed plastic bag for aging. After aging for 48 hours, it was pressed and formed into a sample with a size of Φ40mm×10mm on a press, and the forming pressure was 8.0MPa. Put the molded product into an oven and dry it at 100°C for two hours, take it out and bake it in a high-temperature furnace, keep it at 1050°C for 1.5 hours, and then cool it with the furnace to get the product. The sintered sample has been tested, and its compressive strength is 36.5MPa, and its bulk density is 2.0g / cm 3 , The porosity is 18.7%. ...

Embodiment 2

[0028] Take by weighing 500 grams of oilfield sludge in Example 1, and after fully elutriating in 500 ml of water, filter to remove most of the soluble salts. The clay in Example 1 and the oilfield sludge after washing salt treatment are weighed in a weight ratio of 50:50, and the water of the oilfield sludge and clay gross weight 35% and oilfield sludge and clay gross weight 0.5% are weighed water glass. The above-mentioned materials are placed in a ball mill for ball milling, and the particle size is controlled to be less than 15% on a 10,000-hole sieve. After the slurry is poured out, it is naturally dried to a moisture content of 5.0-6.5%, and placed in a sealed plastic bag for aging. After aging for 36 hours, it was pressed and formed into a sample of Φ60mm×50mm on a press, and the forming pressure was 12.0MPa. After being naturally dried outdoors for 5 days, it is baked in a high-temperature furnace, kept at 1100°C for two hours, and then cooled with the furnace to obt...

Embodiment 3

[0030] Clay and oilfield sludge among the embodiment 1 are made into major ingredient in the ratio of 65: 35, add the water glass of the fly ash of 25% of clay and oilfield sludge total weight and oilfield sludge and clay total weight 0.5% as Auxiliary material, above-mentioned material is placed in ball mill, add the water of 40% of material total amount, then carry out ball mill, the grain size of control material is less than 12% in ten thousand holes sieve. After the slurry is poured out, it is naturally dried to a moisture content of 4.5-5.5%, and placed in a sealed plastic bag for aging. After aging for 36 hours, the sample was pressed and formed into a Φ60mm×50mm size sample on a press, and the forming pressure was 15.0MPa. After 5 days of natural drying outdoors, it is placed in a high-temperature furnace for roasting, and after being kept at 1050°C for two hours, it is cooled with the furnace to obtain the product. The sintered sample has been tested, and its compres...

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Abstract

The invention relates to a method to sinter building block by mud in oil field, including the steps: 1), batching: according to weight ratio, clay 20-80, mud 20-80, and additional auxiliary material 0.1-30% of the total weight of the clay and mud, where the content of the soluble salt is below 0.5% of the total weight; 2) mixing: two modes: one, dry or wet mixing; two, wet mixing; 3), ageing: 1-7 days; 4), molding: adopting half-dry pressing or dry pressing, where the molding pressure is greater than 4.0MPa; 5), drying; 6), sintering: placing the dried preparation into the high temperature furnace for baking, wherein the sintering temperature 800-1200 deg.C, preserving heat for 1-3 hours in the high temperature region and then cooling with the furnace to obtain the products.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a method for sintering building blocks with oilfield sludge. Background technique [0002] Oilfield sludge is a by-product of oilfield sewage treatment, which comes from the solid particles brought to the ground by crude oil production liquid (fine cuttings, clay or silt of oil-bearing layers such as sandstone and limestone) and the reaction product of the material in the container. Its main components vary with geological conditions and production processes, usually the main components are calcium carbonate, mineral oil, silicate, water and soluble salts. The appearance of the oily sludge after treatment and pressure filtration is dark brown or gray lumpy solid with obvious oily smell. At present, there are more than 450 oilfields in China. A large amount of oilfield sludge produced by oil exploitation, except a small part is used as mud circulation in drilling, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B28B3/00C04B33/00
Inventor 雷家珩童辉陈永熙巫辉郭丽萍刘丹杨顺林
Owner WUHAN UNIV OF TECH
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