CN114146812B - Beneficiation method for recovering weighting agent of petroleum drilling - Google Patents
Beneficiation method for recovering weighting agent of petroleum drilling Download PDFInfo
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- CN114146812B CN114146812B CN202111452348.0A CN202111452348A CN114146812B CN 114146812 B CN114146812 B CN 114146812B CN 202111452348 A CN202111452348 A CN 202111452348A CN 114146812 B CN114146812 B CN 114146812B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
本发明提供了一种用于回收石油钻井加重剂的选矿方法。该选矿方法包括如下步骤：首先将原矿与水按比例混合得到混合物；然后向所述混合物中加入硫化钠和非硅类消泡剂，得到共混物；接着进行高速搅拌处理，使原矿和水充分混合成矿浆状态；最后，将混合后的矿浆通过旋流器分级和重选处理，合并精矿后得到重晶石总精矿。本发明采用选矿方法实现石油钻井液中的加重剂的高效回收，流程简单、选别效率高、适应性强，得到的产品可以作为加重剂循环利用，降低了废弃物对环境造成的污染，避免了资源的浪费。
The invention provides a beneficiation method for recovering oil drilling weighting agent. The beneficiation method comprises the following steps: firstly mixing raw ore and water in proportion to obtain a mixture; then adding sodium sulfide and non-silicon defoamer to the mixture to obtain a blend; then performing high-speed stirring treatment to make the raw ore and water The state of ore pulp is fully mixed; finally, the mixed pulp is classified and re-selected by a cyclone, and the concentrate is combined to obtain a total barite concentrate. The invention adopts the beneficiation method to realize the efficient recovery of the weighting agent in the oil drilling fluid, and has the advantages of simple process, high sorting efficiency and strong adaptability. waste of resources.
Description
Technical Field
The invention relates to the technical field of beneficiation, in particular to a beneficiation method for recovering a petroleum drilling weighting agent.
Background
After the petroleum drilling fluid is used, the drilling fluid is mixed with petroleum and some ores and becomes a waste, the weighting agent in the drilling fluid cannot be reused, and the two types of weighting agents recovered from the petroleum drilling fluid by the traditional method are respectively: (1) adopt simple solid phase treatment facility to retrieve the weighting agent through solid-liquid separation's method, the weighting agent purity that obtains is low, is difficult to utilize, only limits in the oil drilling field, for example, the utility model patent of publication No. CN213419055U discloses a drilling fluid barite system of recycling and drilling fluid purification cycle system. (2) The method has the advantages of long flow, violent reaction and harsh conditions, belongs to the field of chemical industry, and simultaneously has the problems of difficult movement and high cost in the actual production.
At present, no relevant research is currently carried out on the recycling of the weighting agent in the petroleum drilling fluid by adopting a beneficiation method in the beneficiation field.
Publication No. CN106944249A provides a combined beneficiation method for waste materials containing low-grade barite. The method comprises the following steps: (1) adding water into the powdery material to prepare ore pulp; (2) feeding the ore pulp obtained in the step into reselection equipment for selection; (3) mixing the heavy minerals obtained in the step II, feeding the heavy minerals into a cyclone for classification to obtain settled sand products and overflow products, and feeding the settled sand products into ore grinding equipment for ore grinding; (4) combining the ore grinding product and the overflow product obtained in the step three, desliming, and mixing slurry after desliming; (5) feeding the ore pulp obtained in the step four into a magnetic separator for sorting; (6) mixing the non-magnetic product obtained in the step fifthly, and feeding the mixed slurry into a flotation machine for 4-6-stage flotation; (7) and sixthly, filtering, removing the medicine and whitening the barite powder product obtained in the step six to obtain the barite product. However, the method aims at the traditional ore materials, the feeding is iron ore tailings, the method cannot effectively perform ore dressing on the mineral raw materials of the petroleum drilling fluid, and the technical defects of long flow and high cost exist.
In view of the above, there is a need for an improved beneficiation process for recovering oil drilling weighting agents that addresses the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a beneficiation method for recovering a petroleum drilling weighting agent.
To achieve the above object, the present invention provides a beneficiation method for recovering a petroleum drilling weighting agent, comprising the steps of:
s1, mixing the raw ore and water according to the proportion of 1: 3-4 to obtain a mixture;
s2, adding sodium sulfide and a non-silicon defoaming agent into the mixture according to a preset proportion to obtain a blend;
s3, stirring the blend at a high speed for 30-60 min to fully mix raw ore and water into an ore pulp state, wherein sodium sulfide and a non-silicon defoamer fully act on the ore pulp in the stirring process;
s4, classifying the mixed ore pulp into + A and-A size fractions through a cyclone, wherein the size fraction of A is 75 mu m; carrying out table reselection on the + A size fraction to obtain + A concentrate and + A tailings; classifying the-A fraction into + B and-B fractions by a cyclone, wherein the B fraction is 38 mu m;
s5, performing centrifugal machine reselection on the grade + B to obtain concentrate + B and tailings + B; carrying out gravity separation on the-B size fraction by using a centrifugal machine to obtain-B concentrate and-B tailings;
and S6, combining the concentrate of + A, the concentrate of + B and the concentrate of-B to obtain the total concentrate of barite.
As a further improvement of the invention, the raw ore is a solid-liquid mixture of weighting materials for petroleum drilling, including barite, quartz, calcite and petroleum.
As a further improvement of the invention, in step S2, the addition amount of the sodium sulfide is 500-1000g/t, and the addition amount of the non-silicon defoaming agent is 500-1000 g/t.
As a further improvement of the invention, the non-silicon defoaming agent is one or a combination of more of C6-C10 monohydric aliphatic alcohol, polysorbate, sodium palmitate and sodium dodecyl sulfate.
As a further improvement of the present invention, in step S5, the process of reselecting the centrifuge is as follows: roughing is carried out through a table concentrator, and roughing concentrate is finely selected through a centrifugal machine to obtain a concentrate product.
The beneficial effects of the invention are:
1. the beneficiation method for recovering the weighting agent for the petroleum drilling well provided by the invention adopts the beneficiation method to recover the weighting agent in the petroleum drilling fluid, has simple process, high sorting efficiency and strong adaptability, effectively recovers useful substances in solid wastes, and reduces the pollution of the wastes to the environment and the waste of resources. Compared with the process in the field of petroleum, the product BaSO obtained by the process 4 The purity is high, and the recovery rate and the utilization rate are high; compared with the chemical field process, the process has strong operability, simple used medicament components, no toxicity and environmental protection, and simultaneously remarkably reduces the recovery cost.
2. The beneficiation method for recovering the weighting agent for the petroleum drilling provided by the invention realizes the separation of petroleum and useful minerals by adopting the sodium sulfide and the non-silicon defoaming agent. The method has strong adaptability, the use amounts of the sodium sulfide and the non-silicon defoaming agent can be properly changed according to the content of the petroleum and the foam state after water is added, so that the recovery rate of the barite is obviously improved, and meanwhile, the obtained product can be used as a weighting agent for recycling, thereby reducing the pollution of waste to the environment and avoiding the waste of resources.
3. The beneficiation method for recovering the petroleum drilling weighting agent provided by the invention adopts a cyclone classification-shaking table gravity separation-cyclone classification-centrifugal machine gravity separation combined beneficiation process on the basis of full contact between sodium sulfide and non-silicon defoaming agents and raw materials, so that the weighting agent can be efficiently recovered.
Drawings
Fig. 1 is a schematic flow diagram of a beneficiation process for recovering oil well weighting agent provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, the present invention provides a beneficiation process for recovering oil drilling weighting agents, which includes the steps of:
s1, mixing the raw ore and water according to the proportion of 1: 3-4 to obtain a mixture;
s2, adding sodium sulfide and a non-silicon defoamer into the mixture according to a preset proportion to obtain a blend;
s3, stirring the blend at a high speed for 30-60 min to fully mix raw ore and water into an ore pulp state, wherein sodium sulfide and a non-silicon defoamer fully act on the ore pulp in the stirring process;
s4, classifying the mixed ore pulp into + A and-A size fractions through a cyclone, wherein the size fraction of A is 75 mu m; carrying out table reselection on the + A size fraction to obtain + A concentrate and + A tailings; classifying the-A fraction into + B and-B fractions by a cyclone, wherein the B fraction is 38 mu m;
s5, performing centrifugal machine reselection on the grade + B to obtain concentrate + B and tailings + B; carrying out gravity separation on the-B size fraction by using a centrifugal machine to obtain-B concentrate and-B tailings;
and S6, combining the concentrate of + A, the concentrate of + B and the concentrate of-B to obtain the total concentrate of barite.
Preferably, the raw ore is a solid-liquid mixture of weighting materials for petroleum drilling, including barite, quartz, calcite and petroleum.
Preferably, in step S2, the addition amount of the sodium sulfide is 500-1000g/t, and the addition amount of the non-silicon defoaming agent is 500-1000 g/t.
Preferably, the non-silicon defoaming agent is one or a combination of more of C6-C10 monohydric fatty alcohol, polysorbate, sodium palmitate and sodium dodecyl sulfate.
Preferably, in step S5, the process of reselecting the centrifuge is as follows: roughing is carried out through a table concentrator, and roughing concentrate is finely selected through a centrifugal machine to obtain a concentrate product.
Example 1
Example 1A certain weight material for oil drilling was used, and the crude ore contained BaSO 4 32.29 percent, the main minerals are barite, quartz, calcite and the like, the raw ore is a solid-liquid mixture and contains about 0.1 percent of petroleum, and the raw ore is in a hydrophobic state due to the fact that the petroleum is a hydrophobic substance, and the barite in the raw ore is difficult to recover by adopting a traditional ore dressing method.
The embodiment 1 of the invention provides a beneficiation method for recovering a petroleum drilling weighting agent, which comprises the following steps:
s1, mixing the raw ore and water according to the proportion of 1: 4 to obtain a solid-liquid mixture.
S2, adding sodium sulfide and a non-silicon defoaming agent (a mixture of polysorbate and sodium dodecyl sulfate in a mass ratio of 1: 1) into the mixture to obtain a blend; the addition amount of the sodium sulfide is 600g/t, and the addition amount of the non-silicon defoaming agent is 600 g/t.
S3, stirring the blend at high speed for 60min to fully mix the raw ore and water into an ore pulp state, wherein the sodium sulfide and the non-silicon defoamer fully act with the ore pulp in the stirring process, and the action mechanism is as follows: because the hydrophobicity of oil, a large amount of foams are produced to the ore pulp after raw ore and water are mixed, add sodium sulfide and non-silicon class defoaming agent and be for the defoaming, the principle of defoaming is that the hydrophobic barite granule can attract the hydrophobic end of medicament on the bubble surface, makes hydrophobic barite granule produce hydrophilicity and gets into the aqueous phase to play the effect of defoaming, reach the purpose that makes the oil desorption on the barite surface separate.
S4, classifying the mixed ore pulp into + A and-A particle grades through a cyclone, wherein the particle grade of A is 75 mu m; carrying out table reselection on the + A size fraction to obtain + A concentrate and + A tailings; the-A fraction was fractionated by a cyclone into + B and-B fractions, the fraction of B being 38 μm.
S5, performing centrifugal machine reselection on the grade + B to obtain concentrate + B and tailings + B; carrying out centrifugal machine reselection on the-B fraction to obtain-B concentrate and-B tailing; the gravity separation process of the centrifuge comprises the following steps: roughing is carried out through a table concentrator, and roughing concentrate is finely selected through a centrifugal machine to obtain a concentrate product.
And S6, combining the concentrate of + A, the concentrate of + B and the concentrate of-B to obtain the total concentrate of barite.
Tests show that in example 1, the barite concentrate contains BaSO 4 90.48 percent and the specific gravity of 4.20g/cm 3 The recovery rate of barite is 50.27%.
Comparative example 1
The raw ore source was the same as in example 1. The centrifuge was directly used for gravity separation without adding sodium sulfide and a non-silicon defoaming agent, and the other steps were the same as in example 1.
Comparative example 2
The raw ore source was the same as in example 1. The sodium sulfide and non-silicon defoamer were not added and the table and centrifuge re-selection was performed in stages, all other things being the same as in example 1.
Comparative example 3
The raw ore source was the same as in example 1. The procedure of example 1 was repeated except that sodium sulfide was not added.
Comparative example 4
The raw ore source was the same as in example 1. The procedure of example 1 was repeated except that the non-silicon defoaming agent was not added.
Table 1 shows beneficiation parameters of example 1 and comparative examples 1 to 4
| Examples | Product name | BaSO 4 Grade% | Specific gravity g/cm 3 | The recovery rate is high |
| Example 1 | Total concentrate | 90.48 | 4.20 | 50.27 |
| Comparative example 1 | Total concentrate | 84.29 | 3.93 | 30.62 |
| Comparative example 2 | Total concentrate | 87.31 | 4.09 | 37.39 |
| Comparative example 3 | Total concentrate | 88.27 | 4.11 | 42.83 |
| Comparative example 4 | Total concentrate | 86.64 | 4.02 | 35.93 |
As can be seen from table 1, the grade of the total barite concentrate provided in example 1 of the present invention and the recovery rate of the barite are significantly higher than those of comparative examples 1-2, which illustrates that after the sodium sulfide and the non-silicon defoamer are added in the beneficiation method provided in example 1, the sodium sulfide and the non-silicon defoamer effectively remove oil substances on the surface of the barite, and perform the function of cleaning the oil substances.
The quality of the total barite concentrate and the recovery rate of the barite of comparative examples 3 to 4 are lower than those of example 1, and the combined action method of the sodium sulfide and the non-silicon defoamer provided by the invention can synergistically enhance the petroleum removing and separating effect on the surface of the barite compared with the action of single sodium sulfide or single non-silicon defoamer, and the mechanism is as follows: sodium sulfide is used for adjusting the pulp environment to a proper pH value range, a non-silicon defoaming agent is added, under the action of mechanical stirring, a medicament and oil substances are fully reacted, and the hydrophobic base cluster of the defoaming agent removes the barite surface of the oil substances through a cleaning process.
Examples 2 to 4
The difference from example 1 is that: the addition amounts of sodium sulfide and the non-silicon defoaming agent were different, and the same was applied to the other homogeneous examples 1, and the description thereof is omitted.
Table 2 shows the beneficiation parameters of examples 1 to 4
As can be seen from table 2, the effect of different amounts of sodium sulfide and non-silicon defoamer on the barite recovery is: increased amount of non-silicon defoamer, BaSO 4 The grade is improved, the recovery rate is reduced, the use amount of sodium sulfide and non-silicon defoamer is reduced simultaneously, and BaSO 4 The grade and the recovery rate are both reduced, the use amount of sodium sulfide and non-silicon defoamer is increased simultaneously, and BaSO 4 The grade and the recovery rate are both improved.
It should be noted that, in other embodiments of the present invention, it should be understood by those skilled in the art that the non-silicon antifoaming agent may also be one or more of C6-C10 monohydric fatty alcohol, polysorbate, sodium palmitate, and sodium lauryl sulfate, which all can achieve better oil removal and separation promoting effect on the surface of the barite. In addition, in specific application occasions, if the sodium sulfide and the non-silicon defoaming agent are used for petroleum drilling raw materials with high petroleum content, the dosage of the sodium sulfide and the non-silicon defoaming agent can be properly changed according to the petroleum content and the foam state after water is added.
In summary, the present invention provides a beneficiation process for recovering petroleum drilling weighting agents. The beneficiation method comprises the following steps: firstly, mixing raw ore and water in proportion to obtain a mixture; then adding sodium sulfide and a non-silicon defoaming agent into the mixture to obtain a blend; then high-speed stirring treatment is carried out, so that raw ore and water are fully mixed into an ore pulp state; and finally, grading and reselecting the mixed ore pulp through a cyclone, and combining the concentrates to obtain the barite total concentrate. The invention adopts the beneficiation method to realize the recovery of the weighting agent in the petroleum drilling fluid, and the obtained product can be used as the weighting agent for recycling, thereby reducing the pollution of wastes to the environment and avoiding the waste of resources.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1567620A (en) * | 1976-01-19 | 1980-05-21 | American Cyanamid Co | Process for beneficiation of nonsulphide ores and collector system useful therein |
| CA1310144C (en) * | 1987-10-19 | 1992-11-10 | Gerhard Heinrich | Process for recovering barite from drilling muds |
| CN1075544C (en) * | 1997-04-25 | 2001-11-28 | 李长水 | Weighting agent for oil well drilling liquid |
| CA3033244C (en) * | 2016-08-25 | 2023-02-28 | Recover Energy Services Inc. | Weight material recovery and reuse method from drilling waste |
| CN106944249A (en) * | 2017-04-27 | 2017-07-14 | 酒泉钢铁(集团)有限责任公司 | Combined beneficiation method for waste materials containing low-grade barite |
| CN108940564B (en) * | 2018-06-15 | 2020-09-25 | 酒泉钢铁(集团)有限责任公司 | Grading and sorting process for fine-grained low-grade barite |
| CN110882837B (en) * | 2019-12-06 | 2021-12-17 | 四川江铜稀土有限责任公司 | Beneficiation method for recovering ultralow-grade barite from tailings |
| CN213669830U (en) * | 2020-09-29 | 2021-07-13 | 中石化江汉石油工程设计有限公司 | A system for the recovery of barite from thermal desorption ash from oil-based drill cuttings |
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