阅读说明：本技术 一种新型节能的选矿用助选剂 (novel energy-saving mineral separation aid ) 是由 左康苗 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种新型节能的选矿用助选剂,由如下重量份数的物质组成：废机油40～70份,乳化剂10～15份,起泡剂5～10份,所述废机油经过预处理、絮凝、离心分离、吸附、过滤步骤制得。本发明利用废油简单处理后作为煤的选矿用助选剂对煤进行浮选,可大大节约能源,保护环境,并为废机油的利用与处理开发了新途径。(the invention discloses a novel energy-saving mineral separation auxiliary agent, which consists of the following substances in parts by weight: the foaming agent is prepared from 40-70 parts of waste engine oil, 10-15 parts of an emulsifier and 5-10 parts of a foaming agent, and the waste engine oil is prepared through the steps of pretreatment, flocculation, centrifugal separation, adsorption and filtration. The invention uses the simply treated waste oil as the dressing assistant for coal dressing to carry out flotation on the coal, can greatly save energy, protect the environment and develop a new way for the utilization and treatment of the waste engine oil.)

1. A novel energy-saving mineral separation auxiliary agent is characterized by comprising the following substances in parts by weight: 40-70 parts of waste engine oil, 10-15 parts of emulsifier and 5-10 parts of foaming agent.

2. The novel energy-saving beneficiation aid for mineral separation according to claim 1, wherein the waste engine oil is prepared through steps of pretreatment, flocculation, centrifugal separation, adsorption and filtration.

3. The novel energy-saving mineral separation aid as claimed in claim 1, wherein the emulsifier is nonylphenol polyoxyethylene ether.

4. the novel energy-saving mineral separation aid as claimed in claim 1, wherein the foaming agent is a composition of butanol and sec-octanol, and the weight ratio of butanol to sec-octanol is 1: 1-1: 5.

5. the novel energy-saving mineral separation aid according to claim 2, characterized by further comprising 1-3 parts by weight of a regulator, wherein the regulator is lime or sodium carbonate or hydrochloric acid.

6. The novel energy-saving beneficiation aid for mineral beneficiation according to claim 1, wherein the dosage of the beneficiation aid is 1.0-2.0 kg/ton of coal.

Technical Field

The invention relates to a mineral separation auxiliary agent, in particular to a novel energy-saving mineral separation auxiliary agent.

Background

Flotation is one of the effective methods for purifying coal, and is a technology for separating minerals at a gas-liquid-solid three-phase interface, and the flotation of coal is based on the difference of surface properties of coal particles and minerals and uses air bubbles as a medium for separation. When the bubbles rise through the dilute coal water suspension, the coal particles with hydrophobic surface are enriched on the surface of the bubbles to form foam, and the foam rises along with the bubbles and is removed as concentrate. While mineral particles with hydrophilic surfaces remain in the flotation cell. In order to improve the separation effect, a flotation aid is required to be added, the flotation aid can effectively improve the hydrophobicity difference between minerals and the firmness degree of the useful minerals adhered to bubbles in the flotation process, and the selection of the type and the dosage of the flotation aid directly influences the technical and economic indexes of the flotation process.

Engine oils are liquid lubricants used in machinery to reduce friction and protect machinery and workpieces. The engine oil consists of base oil and additive. The main components of the base oil are C20-C40 alkane, aromatic hydrocarbon, nitrogen, sulfur and oxygen containing organic matter, etc. the used oil is the oil changed in the use process of various mechanical equipment, and the oil is decomposed by high temperature oxidation, polluted by dust in the air, carbon deposit, metal chips produced by mechanical friction, etc. and has physical and chemical properties incapable of meeting the use requirements. Most of mechanical equipment produces a large amount of dust because of the during operation, and the operational environment difference in temperature is big, uses generally 3 months and just changes, produces a large amount of used oil annually, if handle improper or abandon at will, must cause serious pollution.

At present, no report of directly using waste engine oil for coal flotation exists, kerosene or light diesel oil is commonly used as a collecting agent in a flotation aid in coal dressing in the prior art, but the prior art is lack of energy, how to select a beneficiation aid with simple process and low production cost and little environmental pollution is significant, and the development of a new energy-saving beneficiation aid for mineral dressing is necessary.

Disclosure of Invention

The invention aims to provide a novel energy-saving beneficiation aid for mineral beneficiation aiming at the defects of the prior art.

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

A novel energy-saving mineral separation auxiliary agent comprises the following substances in parts by weight: 40-70 parts of waste engine oil, 10-15 parts of emulsifier and 5-10 parts of foaming agent.

The waste engine oil is prepared by the steps of pretreatment, flocculation, centrifugal separation, adsorption and filtration. The method comprises the following specific steps:

(1) Pretreatment of

placing a container containing the waste engine oil in a vacuum drying oven, performing vacuum dehydration under the conditions that the vacuum degree is 0.08-0.1 MPa and the temperature is 90-95 ℃, standing and settling for 25-30 h, and respectively collecting upper clear oil and lower sediment;

(2) flocculation

After the step (1) is completed, placing the upper clear oil collected in the step (1) in a constant-temperature heating magnetic stirrer, and firstly, according to the upper clear oil under the conditions that the temperature is 40-70 ℃ and the speed is 300-600 r/min: the volume ratio of the soda water solution with the mass fraction of 45 percent is 100: 2-4, adding a 45% sodium carbonate aqueous solution in percentage by mass, and then mixing the above materials according to the following ratio: the volume ratio of 80% hydrazine hydrate is 100: 2-5, adding 80% by mass of hydrazine hydrate, and flocculating for 40-80 min;

(3) Centrifugal separation

then placing the flocculated mixed solution in a constant-temperature drying box, drying at 60-80 ℃ and naturally settling for 3-12 hours, respectively collecting upper-layer oil and lower-layer sediment, finally placing the collected upper-layer oil in a high-speed centrifuge, performing centrifugal separation at the rotating speed of 2000-3000 r/min for 6-10 min, and respectively collecting centrifugal clear oil and centrifugal sediment;

(4) Adsorption filtration

First adsorption filtration: placing the centrifugal clear oil collected in the step (3) in a constant-temperature heating magnetic stirrer, and under the conditions that the temperature is 110-150 ℃ and the speed is 200-500 r/min, firstly, according to the volume of the centrifugal clear oil: the weight ratio of the activated carbon is 100L: adding 5-7 kg of activated carbon in proportion, performing first adsorption for 10-70 min according to specific conditions, then placing the first adsorption mixed solution in a constant-temperature water bath, naturally settling for 1-2 h at the constant temperature of 50-70 ℃, respectively collecting upper-layer oil and lower-layer precipitates, and placing the upper-layer oil in a miniature filter press for first filtration;

And (3) second adsorption filtration: respectively collecting clear filtered oil and filter cakes, placing the collected first clear filtered oil in a constant-temperature heating magnetic stirrer, and performing second adsorption filtration according to the first adsorption filtration step, wherein the adsorption time is 10-70 min according to specific conditions;

And placing the secondary adsorption mixed liquid in a constant-temperature water bath kettle again, naturally settling for 1-2 hours at the temperature of 60-80 ℃, respectively collecting upper-layer oil and lower-layer precipitates, placing the upper-layer oil in a miniature filter press again for secondary filtration, respectively collecting filtered clear oil, and obtaining the collected filtered clear oil which is the prepared waste engine oil for the mineral separation aid.

The emulsifier is nonylphenol polyoxyethylene ether.

The foaming agent is a composition of butanol-octanol and sec-octanol, and the weight and dosage ratio of the butanol-octanol to the sec-octanol is 1: 1-1: 5.

The auxiliary separation agent also comprises 1-3 parts by weight of a regulator, and the regulator is lime or sodium carbonate or hydrochloric acid. The regulator can make the coal slurry have proper pH value.

The dosage of the separation aid is 1.0-2.0 kg per ton of coal.

compared with the prior art, the foaming agent disclosed by the invention has the following advantages:

1. Compared with the existing coal flotation method, the method disclosed by the invention has the advantages that the waste oil is simply treated and then used as the beneficiation aid for coal beneficiation to carry out flotation on the coal, so that the energy can be greatly saved, the environment is protected, and a new way is developed for utilization and treatment of the waste oil.

2. the novel energy-saving beneficiation assistant for mineral beneficiation provided by the invention has a much lower price than the traditional beneficiation assistant, so that the problem of high cost of the traditional beneficiation assistant for coal flotation is solved, the purposes of changing waste into valuable and purifying the environment are achieved, and the novel energy-saving beneficiation assistant has great environmental protection significance, social benefit and economic benefit.

3. The novel energy-saving beneficiation aid for mineral separation provided by the invention has a good flotation effect, the ash content of clean coal is lower than 13%, and the clean coal yield is more than 75%.

4. The raw materials are easy to purchase, the cost is low, the preparation method is simple and feasible, and the market prospect is considerable.

Detailed Description

for better understanding of the present invention, the present invention will be further described in detail with reference to the following specific examples, but the present invention is not limited thereto.