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A method for preparing oil fracturing proppant based on molybdenum tailings
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A technology for fracturing proppants and molybdenum tailings, which is applied in chemical instruments and methods, clay products, earth square drilling, etc., can solve the problems of high proppant damage rate, low compressive strength, and high roasting temperature, and reduce production Energy consumption, simple manufacturing method, and the effect of improving utilization
Active Publication Date: 2022-07-22
铜川恒晟科技材料有限公司
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[0004] The invention provides a method for preparing petroleum fracturing proppant based on molybdenum tailings, which solves the problem of high roasting temperature and high production cost required by the traditional proppant sand preparation method, and the prepared proppant has a high damage rate and low pressure resistance. low intensity problem
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Embodiment 1
[0039] A method for preparing oil fracturing proppant based on molybdenum selection tailings, such as figure 1 shown, including the following steps:
[0040] (1). Pretreatment to select molybdenum tailings;
[0041] a. Separating molybdenum tailings with a shaking table to obtain molybdenum tailings with a particle size of 50-80 microns;
[0042] b. Dry the obtained molybdenum dressing tailings at 90-130°C;
[0043] (2). Mix the molybdenum selection tailings with mullite, kaolin, and admixture, and the weight parts of each component in the mixing process are 45-75 parts of molybdenum selection tailings, 6-15 parts of mullite, and 15 parts of kaolin. -25 parts, 0.05-0.2 part of admixture; and the admixture includes one or more of sulfate, carbonate, iron salt, lime; the mixture is obtained by grinding balls and powder selection, and granulated by a granulator The pellets get round, round bar or ellipsoid balls;
[0044] Since the molybdenum tailings include 71.52% SiO 2 , ...
Embodiment 2
[0066] The difference between this example and Example 1 is that in step (2), the weight fraction of molybdenum selection tailings is 70 parts of tailing powder; the weight fraction of each component in the auxiliary material is: 10 parts of mullite , 20 kaolin, 0.1 part of iron salt.
[0067] The breakage rate of the proppant prepared by the weight fraction of this example is 9%, which is reduced by 4% compared with the conventional preparation method; the compressive strength is 60Mpa, which is increased by 5Mpa compared with the conventional preparation method; it meets the national oil pressure. Fracture proppant requirements.
Embodiment 3
[0069] The difference between this example and Example 1 is that in step (2), the weight fraction of molybdenum tailings is 70 parts; the weight fraction of each component in the auxiliary material is: 15 parts of mullite, 15 parts of kaolin , 0.1 part of lime.
[0070] The breakage rate of the proppant prepared by the weight fraction of this example is 10%, which is 3% lower than that of the conventional preparation method; the compressive strength is 58Mpa, which is 3Mpa higher than that of the conventional preparation method; it meets the requirements of national oil fracturing. proppant requirements.
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Abstract
The invention relates to the technical field of solid waste resource utilization, and discloses a method for preparing oil fracturing proppant based on molybdenum selection tailings, comprising the following steps: (1). Pretreatment and selection of molybdenum tailings; (2). The tailings are mixed with mullite, kaolin and admixtures, and pelletized to obtain pellets; (3). Curing and treating pellets; (4) Heat-treating pellets to obtain primary proppant; (5). Detecting primary support (6). Crushing the unqualified primary proppant to obtain primary proppant powder; returning to step (2) and granulating again, repeating steps (3), (4), (5); (7). The qualified primary proppant is further processed to obtain the finished proppant. The oil fracturing proppant prepared by the invention has a small breakage rate, and the compressive strength meets the strength requirements of the national oil fracturing proppant; and the waste molybdenum dressing tailings are used as raw materials to manufacture the proppant, which alleviates the environmental impact of the molybdenum dressing tailings. Influence, avoid the use of high-cost raw materials such as bauxite, the production cost is small, and the economic benefit is better.
Description
technical field [0001] The invention relates to the technical field of solid waste resource utilization, in particular to a method for preparing a proppant for oil fracturing based on molybdenum selection tailings. Background technique [0002] Molybdenum beneficiation tailings are tailings produced during the extraction and production of molybdenite ore, and the accumulation of a large number of tailings has caused great harm to the environment. The secondary utilization of molybdenum tailings can turn waste into treasure and play an important role in promoting national economic development and protecting the environment. [0003] Oil fracturing proppant is a ceramic particle product with high fracturing strength. It is mainly used for downhole support in oil fields to increase oil and natural gas production. It is an environmentally friendly product. Oil fracturing proppant uses clay as the main raw material, and is a granular material processed by a series of processes s...
Claims
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Application Information
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