CN115846053A - Tailing carbon flotation collector and preparation method thereof - Google Patents

Abstract

The invention discloses a tailing carbon flotation collector and a preparation method thereof. The dispersion degree of the surfactant enhancing reagent in water is utilized, so that the using amount of the carbon flotation collecting agent is effectively reduced; polar components, nonpolar components and metal ions contained in the waste engine oil are utilized to strengthen synergistic adsorption, effectively improve the reagent collecting capability, promote the self-emulsification of the reagent to a certain extent, reduce the stirring strength of stirring emulsification and simplify the reagent synthesis process. The processes of low processing capacity of monomer equipment such as extremely high homogeneous rotation speed, ultrasonic equipment and the like, high equipment requirement and high cost are avoided, and the method is easier to popularize and apply; in addition, the invention provides a reference way for the secondary utilization of the waste engine oil, and simultaneously reduces the preparation cost of the reagent.

Description

Tailing carbon flotation collector and preparation method thereof

Technical Field

The invention belongs to the technical field of mineral separation, and particularly relates to a tailings carbon flotation collector and a preparation method thereof.

Background

The industrial tailings contain a certain amount of useful mineral components, even rare and precious metal components. Mineral separation is an important method for recovering effective components of tailings, particularly a flotation method, and almost all sulfide ores, partial phosphorite, iron ores, non-metallic ores, precious metals, coal and other resources can be recovered. In flotation, carbon often must be decarbonized first to prevent adverse effects on other elements, depending on its good floatability and adsorptivity.

Carbon is a natural easily-selected mineral with a hydrophobic surface, and the medicament is mainly used for expanding and improving the hydrophobicity of the surface, the adhesion on bubbles and the firmness of adhesion. Common collectors are non-polar hydrocarbon compounds such as kerosene, diesel fuel, heavy wax oil, and the like. The emulsifier is an important method for improving the collecting performance, and the basic principle is to improve the dispersity of the collecting agent in water so as to achieve the purposes of reducing the using amount of the collecting agent and reducing the coal flotation cost. The emulsification is optimized mainly from two aspects of an emulsifier and an emulsification process: the emulsifier mostly adopts a compound emulsifier, or is added with an additive with thickening property; the emulsification process tends to be coupled in a variety of ways including high shear stirring, high pressure jet cutting, ultrasonication and homogenization, strong magnetization, and the like.

The rapid development of the automobile and ship industry has led to a substantial increase in the amount of waste engine oil. The waste engine oil contains various additives and metal ions, has great harm to the environment and human beings, and is listed in the national hazardous waste record. At present, most of the waste water is recycled, but the waste water is not comprehensively developed at home due to the problems of high cost, high technical difficulty and secondary pollution. Therefore, the secondary use of the used oil is essential from the economical and environmental viewpoints.

Currently, the emulsification process tends to be complex, which is not beneficial to large-scale popularization and application. Most of the emulsifiers are artificially synthesized reagents, the cost is higher than that of collectors such as diesel oil, kerosene and the like, and the high reagent cost of the emulsifiers cannot be offset by the economic benefit increased after the emulsifiers are used. To increase the economic efficiency to a greater extent and offset the cost of emulsifiers, it is necessary to prepare micro-emulsified oil droplets, which inevitably leads to the use of more complex emulsification processes which are difficult to convert for use in order to increase the flotation efficiency.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a preparation method of a tailings carbon separation collecting agent. The use of the collecting agent can effectively reduce the consumption of kerosene and diesel oil in flotation, and is beneficial to the protection of petroleum resources; the flotation froth scraping time and the oil content in the discharged water are reduced, and the environment is protected; in addition, the preparation process is simple, can be configured on a flotation site, does not change the original flotation process, and has good market popularization value.

In order to solve the technical problems, the invention adopts the following technical scheme:

a tailing carbon flotation collector comprises a main agent, an auxiliary agent and water. The main agent comprises one or two of kerosene and diesel oil, and the auxiliary agent comprises waste engine oil and a surfactant.

Wherein the weight ratio of the main agent to the auxiliary agent to the water is 5 (0.8-1) to (10-15), and the weight ratio of the surfactant to the used oil in the auxiliary agent is 2-3 to (1-2).

Further, the kerosene is industrial kerosene.

Further, the diesel oil comprises any one of 0#, 10# diesel oil.

Further, the used oil is gasoline engine oil, including any one of SJ, SL and SM, the engine oil which is changed when a new vehicle runs for 6000 kilometers can be directly used, and other types of engine oil are used after mechanical impurities are removed through simple sedimentation/centrifugation and filtration.

Further, the surfactant is a non-ionic surfactant compounded by tween series and span series, and the HLB value is 5-8 after compounding.

The preparation method of the tailing carbon flotation collector comprises the following steps: adding the main agent, the auxiliary agent and water into a dispersion machine at one time, wherein the auxiliary agent is directly added into the dispersion machine in sequence according to the composition components without pre-reaction and uniform mixing, and stirring for not less than 20min at the rotating speed of not less than 800rpm at the stirring temperature of 0-40 ℃.

Further, the rotating speed is 800rpm-2000rpm, and the stirring time is 20min-60min.

The collector prepared by the method has good collecting capacity and flotation index. In the tailing carbon separation process, the consumption of kerosene/diesel oil can be effectively saved. The dispersing ability of the reagent in the ore pulp is improved, so that the stirring time required by the collecting agent is shortened, and meanwhile, the foam scraping time is shortened due to the improvement of the collecting ability, so that the time required by carbon flotation is integrally reduced, namely, the flotation speed can be improved by the collecting agent prepared by the method.

The waste engine oil contains polar components and nonpolar components, and meanwhile, metal ions in the waste engine oil can strengthen the adsorption of the polar components on the carbon surface, strengthen the synergistic adsorption and effectively improve the collecting capability of kerosene/diesel oil. Through the utilization of waste engine oil, the synthesis process is simplified while the environment is protected, the stirring, emulsifying and stirring strength is reduced, the complex processes such as high-pressure jet cutting, ultrasonic crushing, homogenization and strong magnetization, small monomer treatment capacity or high equipment requirement are avoided, and the large-treatment capacity and large-scale popularization are facilitated.

The invention has the beneficial effects that: the tailings carbon-separating collecting agent is prepared by taking kerosene and diesel oil as main agents and waste engine oil and a surfactant as auxiliary agents through a simple stirring process. The dispersion degree of the surfactant enhancing reagent in water is utilized, so that the using amount of the carbon flotation collecting agent is effectively reduced; polar components, nonpolar components and metal ions contained in the waste engine oil are utilized to strengthen synergistic adsorption, effectively improve the reagent collecting capability, promote the self-emulsification of the reagent to a certain extent, reduce the stirring strength of stirring emulsification and simplify the reagent synthesis process. The processes of low processing capacity of monomer equipment such as extremely high homogeneous rotation speed, ultrasonic equipment and the like, high equipment requirement and high cost are avoided, and the method is easier to popularize and apply; in addition, the invention provides a reference way for the secondary utilization of the waste engine oil, and simultaneously reduces the preparation cost of the reagent.

Detailed Description

The present invention will be further described with reference to the following examples. It is to be understood that the following examples are illustrative only and are not intended to limit the scope of the invention, which is to be given numerous insubstantial modifications and adaptations by those skilled in the art based on the teachings set forth above.

Example 1

To the disperser, 31.25% of 0# diesel oil, 6.25% of an auxiliary agent (3.29% span-80, 0.62% tween-80, 2.34% new car SL10W/30 used oil), 62.5% water were added. Setting the rotation speed to 800rpm, and stirring for 30min at the normal temperature of 25 ℃ to prepare the collector A.

The zinc kiln slag with a certain carbon content of 12.76% is taken as an object, the grinding fineness is controlled to be 89.87% of 200 meshes, and the pulp mass concentration is controlled to be 30%. In a flotation machine, a certain amount of collecting agent is added and stirred for a certain time, and then foaming agent No. 2 oil is added at a ratio of 600g/t and stirred for 3min. Then the aeration and the scraping plate are opened, and the aeration quantity is controlled to be 0.16m ³ And h, scraping until the foam is vacuolated, and taking time as the scraping time. And collecting the scraped foam product as a concentrate product, and weighing, testing and calculating the concentrate product to obtain the yield, the carbon content and the recovery rate. In the test, 0# diesel oil is used as a collecting agent, and the diesel oil consumption, the diesel oil stirring time, the flotation froth scraping time and the concentrate index are determined through condition tests. And then taking the A as a collecting agent, controlling the yield of flotation concentrate to be similar to that of 0# diesel oil (the difference is less than 2%) under the same other conditions, comparing the using amount of the two collecting agents, the stirring time of the collecting agents, the flotation froth scraping time and the concentrate index, and comparing the final results with the results shown in table 1.

As can be seen from Table 1, compared with diesel oil, the carbon concentration collector prepared at the rotation speed of 800rpm has the advantages that under the condition that the yield of concentrate is not greatly different (1.15%), the using amount of the collector A is reduced by 400g/t (the using amount of the diesel oil is 125 g/t), the stirring time is reduced by 1min, the flotation froth scraping time is reduced by 1.7min, and the carbon recovery rate of the concentrate is improved by 3.07%. It can be seen that the collecting capability, the flotation speed and the flotation effect of the collecting agent A are good.

TABLE 1 comparison of the roughing results

Example 2

In a dispersion machine, 26.46% of kerosene, 4.76% of auxiliary agent (1.87% of span-80, 0.99% of Tween-80, 1.90% of new vehicle SL5W/40 waste engine oil) and 68.78% of water are added. Stirring for 30min at the set rotation speed of 1600rpm and the temperature of 15 ℃ to prepare the collector B.

The zinc kiln slag with a certain carbon content of 12.76% is taken as an object, the grinding fineness is controlled to be 89.87% of 200 meshes, and the pulp mass concentration is controlled to be 30%. In a flotation machine, a certain amount of collecting agent is added and stirred for a certain time, and then foaming agent No. 2 oil is added at a ratio of 600g/t and stirred for 3min. Then the aeration and the scraping plate are opened, and the aeration quantity is controlled to be 0.16m ³ And h, scraping until the foam is vacuolated, and taking time as the scraping time. And collecting the scraped foam product as a concentrate product, and weighing, testing and calculating the concentrate product to obtain the yield, the carbon content and the recovery rate. In the test, kerosene is used as a collecting agent, and the kerosene consumption, the kerosene stirring time, the flotation froth scraping time and the concentrate indexes are determined through condition tests. And then controlling the flotation concentrate yield to be similar to that of kerosene (with the difference of less than 2%) by taking the B as a collecting agent under the same other conditions, comparing the using amount of the two collecting agents, the stirring time of the collecting agents, the flotation froth scraping time and the concentrate index, and comparing the final results with the results shown in a table 2.

As can be seen from table 2, the carbon concentration collector prepared at 1600rpm has a 400g/t higher amount of collector B than kerosene under the condition of a small difference (1.44%) in concentrate yield, but the kerosene amount used by collector B is only 423.36g/t, i.e. collector B is more kerosene-saving. The stirring time of the collecting agent is reduced by 1min, the flotation froth scraping time is reduced by 1.5min, and the carbon recovery rate of the concentrate is improved by 5.98 percent. Therefore, the collecting capability, the flotation speed and the flotation effect of the collecting agent B are good.

TABLE 2 comparison of the results of the first roughing

Example 3

24.04% -10# diesel oil, 3.85% of auxiliary agent (2.60% span-80, 0.18% tween-80, 1.07% new vehicle SL5W/40 waste engine oil) and 72.11% of water are added into a dispersion machine. Setting the rotation speed to be 1000rpm, and stirring for 20min at 40 ℃ to prepare the collector C.

The zinc kiln slag with a certain carbon content of 12.76 percent is taken as an object, the grinding fineness is controlled to be 89.87 percent of 200 meshes, and the pulp mass concentration is controlled to be 30 percent. In thatIn the flotation machine, a certain amount of collecting agent is added and stirred for a certain time, and then foaming agent No. 2 oil is added at a ratio of 600g/t and stirred for 3min. Then the aeration and the scraper are opened, and the aeration quantity is controlled to be 0.16m ³ And h, scraping until the foam is vacuolated, and taking time as the scraping time. And collecting the scraped foam product as a concentrate product, and weighing, testing and calculating the concentrate product to obtain the yield, the carbon content and the recovery rate. In the test, the diesel oil consumption, the diesel oil stirring time, the flotation froth scraping time and the concentrate index are determined by using the 10# diesel oil as a collecting agent through a condition test. Then, the yield of the flotation concentrate is controlled to be similar to that of diesel oil (the difference is less than 2%) by taking the C as the collecting agent under the same other conditions, the using amounts of the two collecting agents, the stirring time of the collecting agent, the flotation froth scraping time and the concentrate indexes are compared, and the final result is compared in a table 3.

As can be seen from Table 3, compared with the-10 # diesel oil, the carbon concentration collector prepared at the rotating speed of 1000rpm has the advantages that the using amount of the collector C is reduced by 300g/t (the using amount of the used diesel oil is 120.2 g/t) under the condition that the yield of the concentrate is not large (0.38%), the stirring time is reduced by 1min, the foam scraping time is reduced by 1.7min, and the carbon recovery rate of the concentrate is improved by 0.47 percentage point. Therefore, the collecting capability, the flotation speed and the flotation effect of the collecting agent C are good.

TABLE 3 comparison of the roughing results

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. A tailings carbon flotation collector is characterized in that: comprises a main agent, an auxiliary agent and water; the main agent comprises one or two of kerosene and diesel oil, and the auxiliary agent comprises waste engine oil and a surfactant; wherein the weight ratio of the main agent to the auxiliary agent to the water is 5 (0.8-1) to (10-15), and the weight ratio of the surfactant to the used oil in the auxiliary agent is 2-3 to (1-2).

2. A tailings carbon flotation collector according to claim 1, wherein: the kerosene is industrial kerosene; the diesel oil comprises any one of 0#, -10# diesel oil.

3. A tailings carbon flotation collector according to claim 1, wherein: the used oil is gasoline engine oil, including any one of SJ, SL and SM, and can be directly used when a new vehicle runs for 6000 km, and other types of engine oil can be used after mechanical impurities are removed through simple sedimentation/centrifugation and filtration.

4. A tailings carbon flotation collector according to claim 1, wherein: the surfactant is a non-ionic surfactant compounded by tween series and span series, and the compounded HLB value is 5-8.

5. A method of making a tailings carbon flotation collector according to any one of claims 1 to 4, comprising the steps of: the main agent, the auxiliary agent and the water are added into a dispersion machine at one time, wherein the auxiliary agent is directly added into the dispersion machine in sequence according to the composition components without pre-reaction and uniform mixing, and the stirring time is not less than 20min at the rotating speed of not less than 800rpm and the stirring temperature is 0-40 ℃.

6. The method of preparing a tailings carbon flotation collector of claim 5, wherein: the rotating speed is 800rpm-2000rpm, and the stirring time is 20min-60min.