阅读说明：本技术 一种用于矿浆管道输送的药剂及其应用 (Medicament for ore pulp pipeline transportation and application thereof ) 是由 董海楠 郭客 刘志斌 宋长春 吴震宇 刘太和 李宏 崔广建 于 2020-12-09 设计创作，主要内容包括：本发明涉及一种用于矿浆管道输送的药剂,它是由如下重量配比的添加剂与稳定剂组成：添加剂为：聚氧化乙烯1～2份、十六烷基三甲基溴化铵2～4份和十八烷基三甲基氯化铵0.8～1.2份；稳定剂为水杨酸钠,添加剂与稳定剂按照重量配比为1:0.5～1.5。其应用是按照其重量配比加水制成2～3％的溶液,再按照100～300ppm的质量浓度加入到含有浮选尾矿的矿浆中。本发明所述的用于矿浆管道输送的药剂溶解性好、易制备,稳定性好、易于运输和储存；能够减低矿浆流体阻力、增加运输效率、降低浆体输送能耗及管道磨损,药剂用量小、节约成本。(The invention relates to a medicament for ore pulp pipeline transportation, which consists of the following additives and stabilizers in parts by weight: the additive is as follows: 1-2 parts of polyoxyethylene, 2-4 parts of hexadecyl trimethyl ammonium bromide and 0.8-1.2 parts of octadecyl trimethyl ammonium chloride; the stabilizer is sodium salicylate, and the weight ratio of the additive to the stabilizer is 1: 0.5-1.5. The flotation tailing slurry is applied by adding water according to the weight ratio to prepare a 2-3% solution, and then adding the solution into the ore slurry containing flotation tailings according to the mass concentration of 100-300 ppm. The medicament for ore pulp pipeline transportation has good solubility, easy preparation, good stability and easy transportation and storage; the slurry conveying device can reduce the resistance of slurry fluid, increase the conveying efficiency, reduce the energy consumption of slurry conveying and the abrasion of pipelines, has small dosage of medicament and saves the cost.)

1. The medicament for conveying the ore pulp pipeline is characterized by comprising the following additives and stabilizers in parts by weight:

the additive is as follows: 1-2 parts of polyoxyethylene, 2-4 parts of hexadecyl trimethyl ammonium bromide and 0.8-1.2 parts of octadecyl trimethyl ammonium chloride;

the stabilizer is sodium salicylate, and the weight ratio of the additive to the stabilizer is 1: 0.5-1.5.

2. The agent for pipeline transportation of ore pulp according to claim 1, characterized in that it consists of the following additives and stabilizers in weight ratio:

wherein, the additive comprises the following components: 1 part of polyoxyethylene, 3.5 parts of hexadecyl trimethyl ammonium bromide and 0.8 part of octadecyl trimethyl ammonium chloride;

the stabilizer is sodium salicylate, and the weight ratio of the additive to the stabilizer is 1:1.

3. The application of the agent for pipeline transportation of ore pulp of the invention is as follows:

stirring and dissolving the raw materials of the additive and the stabilizer in parts by weight in water, adding water according to the weight percentage to prepare 2-3% of water solution, adding the water solution into ore pulp containing flotation tailings according to the mass concentration of 100-300 ppm,

wherein the compositions and the weight ratio of the additive and the stabilizer are as described in claim 1.

Technical Field

The invention belongs to the technical field of ore pulp pipeline conveying, and particularly relates to a medicament for ore pulp pipeline conveying and application thereof.

Background

Pipeline transportation has the advantages of low cost, no pollution, safety and reliability, is widely used as a transportation mode for long-distance transportation of solid materials, and is different from a Newtonian fluid single-phase system for pipeline transportation of oil and natural gas, and a non-Newtonian fluid two-phase or multi-phase system for slurry pipeline transportation of iron ores and other solid materials. At present, most of concentrate and tailing slurry of iron ore mountain concentration plants is conveyed by pipelines. Because the density of iron ore is high, solid particles are easy to gather at the bottom of the pipeline, so that various flow modes are generated, the metal ore pulp cannot be regarded as metastable fluid with fixed rheological property, the flow state of the metastable fluid is related to various factors such as the concentration of the ore pulp, the size of the solid particles, the density of minerals and the like, and the flow form influences the size of pressure drop and the relation between the pressure drop and the flow rate, and influences the erosion characteristic of the pipeline, so that the metastable fluid is very complex.

A chemical agent for reducing resistance to fluid flow. Mainly divided into two categories, water-soluble and oil-soluble. There are two classes of oil-soluble agents that are of interest: one is surfactant compound, the other is high flexible linear polymer with ultrahigh molecular weight, and the two kinds of the polymer also have drag reducing effect, but the use method, the use amount and the advantages and the disadvantages of the two kinds of the polymer are greatly different. The surfactant has good drag reduction and shear resistance, but poor economy, and large addition concentration, and is easy to pollute oil products. The high molecular polymer medicament is usually used in small amount, has good resistance-reducing and delivery-increasing effects, is widely applied to pipeline delivery, and is an important means for improving the pipeline flow capacity and reducing energy consumption. Research shows that both the long-chain polymer and the surfactant have certain drag reduction effect. For example:

CN109456750A discloses an environment-friendly continuous oil pipe drag reducer, which is prepared by sequentially adding a non-ionic surfactant such as a Tween surfactant or isomeric tridecanol polyoxyethylene ether and Taigu oil into water under a high-speed stirring condition, uniformly stirring, and then adding a small-molecular dihydric alcohol and a clay stabilizer.

CN108006438A discloses a turbulent drag reducer and a preparation method thereof, wherein sodium dodecyl sulfate, sodium dioctyl sulfosuccinate and sodium dodecyl benzene sulfonate are fully dispersed in water, and then a stabilizer is added and fully stirred to prepare the turbulent drag reducer. The three surfactants are compounded together to be used as a drag reducer, so that the drag reduction range can be enlarged, a micellar solution formed by a mixed drag reduction solution of the surfactants has obvious anti-shearing dilution capability, the maximum critical shearing stress of the formed drag reduction solution is enhanced by 45 percent compared with that of a single surfactant drag reduction solution, and the maximum drag reduction rate is improved by 20 percent compared with the maximum drag reduction rate when the single surfactant acts on the drag reduction solution.

The above patent documents all utilize that monomer molecules in a surfactant solution can form micro micelle structures with different shapes under the action of different shearing forces, and the different micro structures can influence the rheological properties of the surfactant solution, so that the surfactant solution can show different rheological properties under different shearing forces; the rheological properties, in turn, affect the turbulent structure within the fluid, further affecting the drag reducing properties of the surfactant solution.

In order to solve the problem of increasing the transportation efficiency in the ore pulp pipeline transportation, mainly aiming at the problems of large resistance, high energy consumption and high transportation cost of the ore pulp pipeline transportation, the invention develops a medicament for the ore pulp pipeline transportation by adopting the means of compounding the high molecular polymer and the surfactant and adding the stabilizer through the test based on the surfactant to reduce the surface tension and improve the dissolving capacity of the high molecular polymer to form the mixed micelle liquid.

Disclosure of Invention

The invention aims to provide a medicament for pipeline transportation of ore pulp.

It is a further object of the invention to provide a use of the agent for pulp piping.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the medicament for conveying the ore pulp pipeline is characterized by comprising the following additives and stabilizers in parts by weight:

the additive is as follows: 1-2 parts of polyoxyethylene, 2-4 parts of hexadecyl trimethyl ammonium bromide and 0.8-1.2 parts of octadecyl trimethyl ammonium chloride;

the stabilizer is sodium salicylate, and the weight ratio of the additive to the stabilizer is 1: 0.5-1.5.

The medicament for conveying the ore pulp pipeline is characterized by comprising the following additives and stabilizers in parts by weight:

wherein, the additive comprises the following components: 1 part of polyoxyethylene, 3.5 parts of hexadecyl trimethyl ammonium bromide and 0.8 part of octadecyl trimethyl ammonium chloride;

the stabilizer is sodium salicylate, and the weight ratio of the additive to the stabilizer is 1:1.

The application of the agent for pipeline transportation of ore pulp of the invention is as follows:

stirring and dissolving the raw materials of the additive and the stabilizer in parts by weight in water, adding water according to the weight percentage to prepare 2-3% of water solution, adding the water solution into ore pulp containing flotation tailings according to the mass concentration of 100-300 ppm,

wherein the components and the weight ratio of the additive and the stabilizer are the same as those of the above.

The medicament raw material components for conveying the ore pulp pipeline have the following functions:

the additive is a high molecular polymer: polyethylene oxide with surfactant: the composite medicament of hexadecyl trimethyl ammonium bromide and octadecyl trimethyl ammonium chloride has flexible macromolecules with linear or spiral structures, when the polymers are added into a solvent, single molecules are gathered together to form colloidal particles, molecular chains in the colloidal particles continuously rotate and are combined under the action of van der Waals force to increase the sizes of coils, and finally a chain mesh structure is formed, and the chain mesh structure can be bent or stretched when moving in the solution, so that the relation among all axial directions is reduced, the relevant moments in all directions are reduced, and the reduction of Reynolds stress is finally caused.

The stabilizing agent sodium salicylate can promote the growth of a surfactant micelle system to generate wormlike micelles, and can easily form a shear induction structure under the action of shear force, so that the generation of turbulence in fluid can be reduced, the shear stress of the turbulence is reduced, the additive micelles are prevented from being sheared and damaged, and the stability of the additive micelles is improved; in addition, hydrogen bond action exists between the hydroxyl connecting chains, so that the hydrophilicity of the end groups of the additive is promoted, the dissociation of counter ions is promoted, the charge density of the surface of the micelle is increased, the combined salicylate counter ion bond is enhanced, the electrostatic repulsion between the end groups is reduced, and the intermolecular hydrogen bond is enhanced in turn, so that the shearing resistance of the additive is enhanced, and the shearing capacity of the additive is improved.

The medicament for conveying the ore pulp pipeline has the characteristics that:

1. good solubility, easy preparation, good stability, and easy transportation and storage.

2. The resistance of ore pulp fluid is reduced, the transportation efficiency is increased, the energy consumption of slurry transportation and the abrasion of pipelines are reduced, the dosage of the medicament is small, and the cost is saved.

Detailed Description

The present invention is further illustrated by the following examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the invention.

Sources of various raw materials described in examples and comparative examples:

polyethylene oxide (PEO molecular weight 800w) was obtained from Shanghai Yijian development Co., Ltd, cetyltrimethylammonium bromide (CTAB) was obtained from Tanjian Chemicals Co., Ltd, octadecyltrimethylammonium chloride (1831) was obtained from Shandong Linyi Lanshan area Lv Sen Chemicals Co., Ltd, and sodium salicylate was obtained from Tianjin Konji Chemicals Co., Ltd.

The preparation and use methods of the medicament solution for pipeline transportation of ore pulp described in the examples and the comparative examples are as follows: the application of the medicament for pipeline transportation of ore pulp is as follows:

stirring and dissolving the raw materials of the additive and the stabilizer in the weight part ratio in water, adding water according to the weight percentage to prepare 2 aqueous solution, and adding the aqueous solution into ore pulp containing flotation tailings according to the mass concentration of 300 ppm.

Example 1

The additive is as follows: 1 part of polyoxyethylene, 2 parts of hexadecyl trimethyl ammonium bromide and 0.8 part of octadecyl trimethyl ammonium chloride; the ratio of the additive to the sodium salicylate is 1: 0.5.

And (3) detection results: the drag reduction rate was 29.52%.

Example 2

The additive is as follows: 1.5 parts of polyoxyethylene, 2.5 parts of hexadecyl trimethyl ammonium bromide and 0.8 part of octadecyl trimethyl ammonium chloride; the ratio of the additive to the sodium salicylate is 1: 0.5.

And (3) detection results: the drag reduction was 34.53%.

Example 3

The additive is as follows: 1.5 parts of polyoxyethylene, 2.5 parts of hexadecyl trimethyl ammonium bromide and 1 part of octadecyl trimethyl ammonium chloride; the ratio of the additive to the sodium salicylate is 1:1.

And (3) detection results: the drag reduction was 38.84%.

Comparative example 1

The additive is as follows: 1.9 parts of polyoxyethylene and 3.1 parts of hexadecyl trimethyl ammonium bromide; the ratio of the additive to the sodium salicylate is 1:1.

And (3) detection results: the drag reduction was 21.04%.

Comparative example 2

The additive is as follows: 3.5 parts of hexadecyl trimethyl ammonium bromide and 1.5 parts of octadecyl trimethyl ammonium chloride; the ratio of the additive to the sodium salicylate is 1:1.

And (3) detection results: the drag reduction rate was 23.18%.

Comparative example 3

The additive is as follows: 3.2 parts of polyoxyethylene and 1.8 parts of octadecyl trimethyl ammonium chloride; the ratio of the additive to the sodium salicylate is 1:1.

And (3) detection results: the drag reduction rate was 21.89%.

Example 4

The additive is as follows: 1 part of polyoxyethylene, 3.5 parts of hexadecyl trimethyl ammonium bromide and 0.8 part of octadecyl trimethyl ammonium chloride; the ratio of the additive to the sodium salicylate is 1:1.

And (3) detection results: the drag reduction was 58.86%.

The additive is as follows: 1 part of polyoxyethylene, 2 parts of hexadecyl trimethyl ammonium bromide and 0.8 part of octadecyl trimethyl ammonium chloride; the ratio of the additive to the sodium salicylate is 1: 0.5.

Comparative example 4

The additive is as follows: 1.4 parts of polyoxyethylene and 3.9 parts of hexadecyl trimethyl ammonium bromide; the ratio of the additive to the sodium salicylate is 1:1.

And (3) detection results: the drag reduction ratio was 32.04%.

Comparative example 5

The additive is as follows: 4 parts of hexadecyl trimethyl ammonium bromide and 1.3 parts of octadecyl trimethyl ammonium chloride; the ratio of the additive to the sodium salicylate is 1:1.

And (3) detection results: the drag reduction was 35.18%.

Comparative example 6

The additive is as follows: 2.5 parts of polyoxyethylene and 1.8 parts of octadecyl trimethyl ammonium chloride; the ratio of the additive to the sodium salicylate is 1:1.

And (3) detection results: the drag reduction was 27.89%.

Example 5

The additive is as follows: 2 parts of polyoxyethylene, 2 parts of hexadecyl trimethyl ammonium bromide and 1 part of octadecyl trimethyl ammonium chloride; the ratio of the additive to the sodium salicylate is 1: 1.5.

And (3) detection results: the drag reduction was 38.49%.

Example 6

The additive is as follows: 2 parts of polyoxyethylene, 4 parts of hexadecyl trimethyl ammonium bromide and 1.2 parts of octadecyl trimethyl ammonium chloride; the ratio of the additive to the sodium salicylate is 1:1.

And (3) detection results: the drag reduction rate was 45.75%.

Example 7

The additive is as follows: 1.5 parts of polyoxyethylene, 3.5 parts of hexadecyl trimethyl ammonium bromide and 0.8 part of octadecyl trimethyl ammonium chloride; the ratio of the additive to the sodium salicylate is 1:1.

And (3) detection results: the drag reduction was 51.36%.

Example 8

The additive is as follows: 1 part of polyoxyethylene, 4 parts of hexadecyl trimethyl ammonium bromide and 1 part of octadecyl trimethyl ammonium chloride; the ratio of the additive to the sodium salicylate is 1:1.

And (3) detection results: the drag reduction rate was 49.74%.

The results of the determination of the drag reduction ratio in examples 3 and 3, and examples 4 and 4 of the present invention, and further in examples 5, 6 and 7, demonstrate that the cetyltrimethylammonium bromide used plays a major role in the raw material composition;

the results of the measurement of the drag reduction rates of example 3 and comparative example 3, and example 5 and comparative example 6 of the invention show that the drag reduction effect is obviously reduced when the component cetyl trimethyl ammonium bromide is absent;

the results of the drag reduction rate measurement of comparative example 1 and comparative example 2 of embodiment 3, and the results of the drag reduction rate measurement of embodiment 4, comparative example 4 and comparative example 5 show that the effect of the combination of polyoxyethylene and octadecyl trimethyl ammonium chloride is better than that of the single use of any formula component;

the resistance reducing rate results of comparative examples 1, 2 and 3 in example 3, 4, 5 and 6 in example 4 are determined, and it can be seen that the resistance reducing effect of the combination of polyethylene oxide, cetyl trimethyl ammonium bromide and octadecyl trimethyl ammonium chloride is better than that of the two combined formulas;

the data of the test results of examples 1 to 8 of the present invention demonstrate that: when 1 part of polyoxyethylene, 3.5 parts of hexadecyl trimethyl ammonium bromide and 0.8 part of octadecyl trimethyl ammonium chloride are added, and the weight ratio of the additive to the sodium salicylate is 1:1, the drag reduction effect is best, and the drag reduction rate is 58.86%.

The invention adopts a loop device to perform resistance reduction test, and the test principle is as follows:

the invention can reduce the fluid friction resistance after adding the medicament into the fluid, which is expressed by the reduction of pressure and the increase of flow, and reduce the fluid friction resistance after adding the medicament into the fluid, which is expressed by the reduction of friction pressure drop and the increase of flow.

The drag reduction ratio calculation formula is as follows:

DR-drag reduction ratio%

Coefficient of friction resistance of fluid flowing in pipe before adding lambda 0-drag reducer

Coefficient of friction resistance of fluid flowing in pipe after lambda DR-drag reducer is added

In the formula: lambda-coefficient of friction of fluid flowing in the pipe;

d-pipe diameter, m;

delta P-the differential pressure value, Pa, at the two ends of the test section;

l-test segment length, m;

rho-pulp density, kg/m 3;

q-pipe flow, m 3/s.