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Unburned brick made from waste mud and preparation method thereof

A technology of waste mud and unburned bricks, which is applied in the fields of unburned bricks and its preparation and application, can solve problems such as environmental pollution, disposal or comprehensive utilization difficulties, and achieve the effects of purifying the environment, reducing construction costs, and alleviating land shortage

Active Publication Date: 2020-10-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many problems and deficiencies have gradually been exposed in the treatment of solidified landfill drilling waste: First, due to the addition of a large amount of curing agent in the solidification method, the final amount of solid waste increased by 30% on the original basis, which brought great potential for subsequent disposal or comprehensive utilization. Second, there are still environmental risks after solidification and landfill. Solidification only fixes the pollutants in the solidification pool, not eliminates the pollutants. In the long run, once harmful substances change in the solidification body and leak to the outside, There is a certain risk of pollution to the environment

Method used

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  • Unburned brick made from waste mud and preparation method thereof
  • Unburned brick made from waste mud and preparation method thereof
  • Unburned brick made from waste mud and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Grind and sieve the natural air-dried drill cuttings to obtain drill cuttings with a particle size of 0.3-0.6mm, then take 60g and 10g of gravel, 8g of slaked lime, 3g of β-hemihydrate gypsum, 3g of clay, and 1g of additives. Mix well, add water (14g) and wheel mill, age for 4 hours, add 20g of cement, add an appropriate amount of water, control the moisture content of the mixture to 5%, wheel mill again, and complete. Put it into the mold, shape it under the pressure of 30MPa, and keep it for 20 days naturally after demoulding. The auxiliary agent is composed of calcium chloride, calcium lignosulfonate and water glass in a mass ratio of 2:1:1.

Embodiment 2

[0037] Add a small amount of destabilizing water agent to 200g of waste mud (moisture content is about 20-30%), stir well to break the emulsion, dry at 110°C, use a universal pulverizer to crush and sieve to obtain a particle size of 0.3-0.6 mm of drilling cuttings for use. Take 50g of the above drill cuttings, 5g of gravel, 8g of slaked lime, 3g of β-hemihydrate gypsum, 3g of clay, and 1g of additives, mix them thoroughly, add a water wheel to grind, age for 4 hours, add 28g of cement, add an appropriate amount of water, and control the mixing The moisture content is 15%, and the wheel is rolled again, and the end is completed. Put it into the mold, shape it under the pressure of 50MPa, and naturally maintain it for 30 days after demoulding. The additive is composed of calcium chloride and calcium lignosulfonate in a mass ratio of 2:1.

Embodiment 3

[0039] Take the naturally air-dried drill cuttings, grind and sieve to obtain drill cuttings with a particle size of 0.3mm, then take 52g of drill cuttings, mix them with 10g of quicklime, 3g of α-hemihydrate gypsum, 3g of clay, 5g of river sand, and 1g of additives, add water Wheel milling, aging for 8 hours, adding 28g of cement, adding an appropriate amount of water, controlling the moisture content of the mixture to 13%, and wheel milling again, complete. Put it into the mold, shape it under the pressure of 50MPa, and naturally maintain it for 30 days after demoulding. The additive is composed of calcium chloride and calcium lignosulfonate in a mass ratio of 2:1.

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Abstract

The invention relates to a method for preparing a baking-free brick from waste drilling slurry. The baking-free brick is prepared from the following raw material components: drilling cuttings, a cementing agent, an activity excitation agent, a retarder, a reinforcing agent, a pollutant controlling agent, other auxiliary agents and water. A preparation process comprises the following steps: sufficiently mixing the components according to a certain sequence and a certain ratio; after ageing, preparing a clinker; adding the cementing agent and the water into the clinker for the second time and carrying out wheel grinding again; putting the mixture into a steel mold and molding; de-molding to obtain a brick blank; after curing the brick blank, stacking; finally, naturally drying to obtain a finished product. The baking-free brick prepared by the method has relatively high compression strength and bending strength and all indexes of leachate reach Standard for Pollution Control of General Industrial Solid Waste Storage and Disposal Sites (GB18599-2001); the cost is relatively low.

Description

technical field [0001] The invention belongs to the field of burn-free bricks and their preparation and application, in particular to burn-free bricks made from waste mud and a preparation method. Background technique [0002] With the development of the modern petroleum industry, the production scale of the petroleum industry is expanding day by day. Drilling waste mud produced in the process of drilling and oil production has become an important environmental pollutant. Drilling waste mud contains various pollutants such as saline and alkali, heavy metal ions, petroleum hydrocarbons, macromolecular organic matter and its decomposition products. The composition is complex. If it is not treated, it will cause great harm to the surrounding environment, mainly in the following aspects : ① Pollution of surface water resources and groundwater resources, and the large area and wide area of ​​pollution due to the fluidity of drilling production; ② Pollution of soil, resulting in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00017C04B2111/00025C04B2201/50C04B18/16C04B22/064C04B22/143C04B22/124C04B24/18C04B12/04C04B14/02C04B14/10C04B14/06
Inventor 孙恩呈韩卓马文翠宋春燕席琦
Owner CHINA PETROLEUM & CHEM CORP
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