Processing method for preparing fast-hardening early-strength oil well cement with industrial waste slag
A technology of industrial waste residue and oil well cement, applied in cement production, clinker production, etc., can solve the problem of rare oil well cement clinker, and achieve the effects of reducing calcination temperature, reducing emissions, and reducing energy consumption
Inactive Publication Date: 2015-10-28
GEZHOUBA SONGZI CEMENT
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Phosphorus slag and steel slag are important components in the treatment of bulk industrial waste slag during the "Twelfth Five-Year Plan". Although there are many research reports, they are relatively rare in the preparation of oil well cement clinker
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[0011] According to the chemical composition of each raw material, the design clinker three rate values are: KH=0.930±0.02; SM=2.75±0.10; IM=0.80±0.1. The mass percentages of each raw material are: limestone 73.0%, red sandstone 12.0%, phosphorous slag 5%, steel slag 7%, and calcium-increasing slag 3%. After the raw materials are ground and pre-homogenized, they are calcined at a high temperature in a φ4*60m cement kiln and cooled to produce oil well cement clinker. In the process of oil well clinker grinding, 1% silica fume and 3% gypsum are added, and finally the specific surface area is 295~305m 2 / kg of rapid-hardening and early-strength oil well cement. The chemical composition and mineral composition of the four batches of samples under the same raw meal ratio are shown in Table 1, and the physical properties are shown in Table 2. Compatibility comparison with G grade oil well cement admixture is shown in Table 3.
[0012] Table 1 Chemical and mineral composition of...
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The invention relates to a processing method for preparing fast-hardening early-strength oil well cement with industrial waste slag. The method adopts the raw materials of, by weight, 60-75 parts of limestone, 10-15 parts of red sandstone, 3-6 parts of phosphorous slag, 4-7 parts of steel slag, and 1-5 parts of calcium-enriched slag. The processing method comprises the following steps: the raw materials are ground and homogenized with a raw material grinding system; the homogenized raw material is calcined into a clinker in a kiln; the clinker is ground, wherein 0.5-2.5% of silica fume and 2.5-4.5% of gypsum are added into the clinker during the grinding process. According to the invention, CaO and MgO in the steel slag, phosphorous slag and calcium-enriched slag exist in a form of non-carbonate, such that CO2 emission during the clinker calcination process can be reduced. Also, the steel slag and phosphorous slag serve as crystal seeds during clinker calcination, such that clinker calcination temperature is reduced, and unit clinker calcination energy consumption can be reduced.
Description
technical field [0001] The invention relates to a quick-hardening early-strength oil well cement. Background technique [0002] As the basis for human survival, energy is the driving force for human development. Petroleum is a non-renewable resource, which belongs to primary energy, and occupies a pivotal position in the energy composition of the world today. Therefore, it is particularly important to do a good job in oil extraction. In the process of oil exploitation, cementing work is the prerequisite for ensuring safe exploitation. In order to standardize the performance requirements of cementing oilfield cement, my country formulated GB10238-2005 based on the API oilwell cement standard. Due to the complexity of the terrain and environment of oil exploitation, the performance of oil well cement specified in GB10238-2005 sometimes cannot fully meet the needs of actual cementing conditions, such as higher early strength, shorter setting time, better admixture adaptabili...
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Login to View More IPC IPC(8): C04B7/147C04B7/36
CPCY02P40/10Y02P40/121
Inventor 邹兴芳夏枫童昊郭成洲陆小黑张德华刘生超杨莉荣
Owner GEZHOUBA SONGZI CEMENT