Flotation collecting agent for phosphorite with high harmful impurity content and application of flotation collecting agent

Abstract

The invention relates to a flotation collecting agent for phosphorite with high harmful impurities. Belongs to the technical field of phosphorite beneficiation. The collecting agent comprises di-tert-butyl azodicarboxylate and 3-acetyl-2, 5-dimethylthiophene, and is particularly suitable for direct flotation of phosphorite with high harmful impurities. The phosphorite collecting agent can be mixed with fatty acid soap and water for use. The novel flotation collecting agent for phosphorite with high harmful impurities has high selectivity, and through unique molecular design and formula optimization, the concentrate quality can be remarkably improved, and the recovery rate can be remarkably increased. The flotation collecting agent is low in agent consumption, can reduce the agent dosage on the premise of guaranteeing the collecting effect, accordingly reduces the production cost, is non-toxic or low-toxicity, easy to degrade and environmentally friendly, and meets the development requirements of the green mining industry.

Description

Technical Field

[0001] The invention belongs to the technical field of phosphate ore dressing, and in particular relates to a flotation collector for phosphate ore with high harmful impurities. Background Art

[0002] As an important chemical raw material, phosphate rock is widely used in agriculture, fertilizer, food, new energy and other fields. In phosphate concentrate, iron-containing minerals, aluminum-containing minerals and magnesium-containing minerals are harmful impurities, which have a significant negative impact on the downstream phosphorus chemical industry. However, with the continuous exploitation of mineral resources, the proportion of high-harmful impurity phosphate ores has gradually increased, and the difficulty of beneficiation of such phosphate ores has also increased. Because such phosphate ores contain relatively high levels of harmful impurities such as iron minerals, aluminum minerals and magnesium minerals, traditional flotation collectors often face problems such as low selectivity and poor concentrate quality when processing them. Therefore, the development of a new type of efficient and environmentally friendly flotation collector is of great significance for improving the beneficiation efficiency of high-harmful impurity phosphate ores, reducing production costs and reducing environmental pollution.

[0003] Insufficient existing technology: Low selectivity of collectors: Traditional flotation collectors are not effective in collecting target minerals in phosphate ore with high harmful impurities, resulting in low concentrate quality and excessive harmful impurities such as iron, aluminum, and magnesium.

[0004] ‌ ‌Limited collection capacity‌: When traditional flotation collectors are used for phosphate ores with high harmful impurities, their collection capacity is often interfered by impurities, resulting in low concentrate recovery rates and difficulty in meeting market demand.

[0005] Serious environmental pollution: Some traditional flotation collectors will produce harmful substances during use, causing environmental pollution, which does not meet the current development requirements of green mining.

[0006] With the continuous advancement of science and technology and the enhancement of environmental awareness, the research and development of flotation collectors is moving towards high efficiency, environmental protection, low toxicity and easy degradation. New flotation collectors not only need to have excellent collection performance, but also meet environmental protection requirements and reduce the impact on the environment. Summary of the invention

[0007] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and propose a new flotation collector for phosphate ore with high harmful impurities, which has high selectivity and low reagent consumption.

[0008] The technical problem to be solved by the present invention is achieved by the following technical solution. The present invention is a flotation collector for high-harmful impurity phosphate ore, which is characterized in that the phosphate ore collector comprises di-tert-butyl azodicarboxylate (C 10 H 18 N2O4) and 3-acetyl-2,5-dimethylthiophene (C8H 10OS), this collector is particularly suitable for the positive flotation of phosphate ore with high harmful impurities.

[0009] In the flotation collector of the present invention: di-tert-butyl azodicarboxylate C 10 H 18 N2O4 and 3-acetyl-2,5-dimethylthiophene C8H 10 The mixing ratio of OS is preferably 0.15-40:1, and more preferably 0.5-20:1.

[0010] The high harmful impurity phosphate ore mentioned in the present invention mainly refers to phosphate ore with a Fe2O3 content of 1-10%, an Al2O3 content of 1-10%, and a MgO content of 0.5-5%.

[0011] The flotation collector of high-harmful impurity phosphate ore of the present invention has a further preferred technical solution that the phosphate ore collector can be mixed with fatty acid soap. When the phosphate ore collector is mixed with fatty acid soap, the total content of di-tert-butyl azodicarboxylate and 3-acetyl-2,5-dimethylthiophene in the mixture is preferably 0.5-10%, and more preferably 2-7%.

[0012] The flotation collector for phosphate ore with high harmful impurities described in the present invention has a further preferred technical solution that the phosphate collector is mixed with fatty acid soap, the content of di-tert-butyl azodicarboxylate in the mixture is 0.3-8%, and the content of 3-acetyl-2,5-dimethylthiophene in the mixture is 0.2-2%.

[0013] The flotation collector for high-harmful impurity phosphate ore of the present invention has a further preferred technical solution that the phosphate ore collector is mixed with a fatty acid soap, and the fatty acid soap is preferably one or more of oleic acid soap, stearic acid soap, tall oil soap, lauric acid soap, and caprylic acid soap.

[0014] The flotation collector for phosphate ore with high harmful impurities described in the present invention has a further preferred technical solution that the phosphate ore collector is mixed with fatty acid soap, and when the fatty acid soap is a plurality of oleic acid soap, stearic acid soap, tall oil soap, lauric acid soap, and caprylic acid soap, the ratio thereof is any ratio.

[0015] The flotation collector of high-harmful impurity phosphate ore of the present invention has a further preferred technical solution: the collector is particularly suitable for positive flotation of high-harmful impurity phosphate ore, in which the high-harmful impurity phosphate ore has a P2O5 content of 2-25%, a Fe2O3 content of 1-10%, an Al2O3 content of 1-10%, and a MgO content of 0.5-5%.

[0016] Compared with the prior art, the present invention has the following beneficial effects: ‌High selectivity‌: Through unique molecular design and formula optimization, the collector of the present invention has excellent selectivity for target minerals in phosphate ore with high harmful impurities, and can significantly improve the concentrate quality and recovery rate.

[0017] ‌Low reagent consumption‌: Under the premise of ensuring the collection effect, the collector of the present invention can reduce the amount of reagents used, thereby reducing production costs.

[0018] Environmentally friendly: The collector of the present invention is non-toxic or low-toxic, easily degradable, environmentally friendly, and meets the development requirements of green mining.

[0019] 4. Under the same flotation conditions, the collector can increase the P2O5 recovery rate of phosphate concentrate by more than 5% and reduce the content of harmful impurities by more than 50% compared with traditional fatty acid soap collectors.

[0020] The novel flotation collector proposed in the present invention has significant advantages in terms of high selectivity, low reagent consumption and environmental friendliness, and is expected to provide a new solution for the beneficiation of phosphate ore with high harmful impurities. DETAILED DESCRIPTION

[0021] The specific technical solutions of the present invention are further described below to facilitate further understanding of the present invention by those skilled in the art, but do not constitute a limitation on the rights thereof.

[0022] Example 1, a flotation collector for phosphate ore with high harmful impurities.

[0023] The weight ratio of the flotation collector is: di-tert-butyl azodicarboxylate (C 10 H 18 N2O4) 4% and 3-acetyl-2,5-dimethylthiophene (C8H 10 OS) 1.5%, sodium oleate 20% and water 74.5%.

[0024] The flotation collector floated a domestic phosphate ore sample with high harmful impurities. The original ore P2O5 content was 10.34%, Fe2O3 7.42%, Al2O3 content was 3.58%, and MgO content was 4.65%. The positive flotation process was adopted, with one roughing and two concentrating. The flotation reagent system was: 3.0kg / t original ore as the adjusting agent sodium carbonate, 1.5kg / t original ore as the depressant water glass, and 1.3kg / t original ore as the flotation collector.

[0025] Phosphate concentrate was obtained by flotation: qualified phosphate concentrate with P2O5 grade of 32.17%, Fe2O3 content of 1.98%, Al2O3 content of 0.85%, MgO content of 0.94%, and P2O5 recovery rate of 82.37%.

[0026] Comparative Example 1: The weight ratio of the conventional collector is: 20% sodium oleate and 80% water; the raw ore is the same as that in Example 1.

[0027] The positive flotation process is adopted, with one roughing and two cleaning processes. The flotation reagent system is: 3.0kg / t of raw ore as adjusting agent sodium carbonate, 1.5kg / t of raw ore as inhibitor water glass, and 1.3kg / t of raw ore as flotation collector.

[0028] Phosphate concentrate was obtained by flotation: qualified phosphate concentrate with P2O5 grade of 31.73%, Fe2O3 content of 2.87%, Al2O3 content of 1.95%, MgO content of 1.57%, and P2O5 recovery rate of 75.84%.

[0029] Example 2, a flotation collector for difficult-to-select phosphate ore.

[0030] The weight ratio of the flotation collector is: di-tert-butyl azodicarboxylate (C 10 H 18 N2O4) 3.5% and 3-acetyl-2,5-dimethylthiophene (C8H 10 OS) 1.5%, sodium oleate and tart oil soap (weight ratio 1:1) 20% and water 75.0%.

[0031] The flotation collector floated a domestic phosphate ore sample with high harmful impurities. The original ore P2O5 content was 15.37%, Fe2O3 7.01%, Al2O3 content was 3.17%, and MgO content was 3.54%. The positive flotation process was adopted, with one roughing and two concentrating. The flotation reagent system was: 3.0kg / t original ore of sodium carbonate as the adjusting agent, 1.5kg / t original ore of water glass as the inhibitor, and 1.3kg / t original ore of flotation collector.

[0032] Flotation can obtain qualified phosphate concentrate with a P2O5 grade of 34.84%, a Fe2O3 content of 1.73%, an Al2O3 content of 1.04%, and a MgO content of 0.77%, and a P2O5 recovery rate of 86.72%.

[0033] Comparative Example 2: The conventional collector has a weight ratio of: 20% sodium oleate and tall oil soap (weight ratio 1:1) and 80% water. The original ore is the same as that in Example 2.

[0034] The positive flotation process is adopted, with one roughing and two cleaning processes. The flotation reagent system is: 3.0kg / t of raw ore as adjusting agent sodium carbonate, 1.5kg / t of raw ore as inhibitor water glass, and 1.3kg / t of raw ore as flotation collector.

[0035] The qualified phosphate concentrate obtained by flotation has a P2O5 grade of 34.13%, a Fe2O3 content of 2.85%, an Al2O3 content of 2.26%, and a MgO content of 1.37%. The P2O5 recovery rate is 78.38%.

[0036] Example 3, a flotation collector for difficult-to-select phosphate ore.

[0037] The weight ratio of the flotation collector is: di-tert-butyl azodicarboxylate (C 10 H 18 N2O4) 3.5% and 3-acetyl-2,5-dimethylthiophene (C8H 10 OS) 2.5%, sodium oleate and sodium laurate (weight ratio 1:1) 20% and water 74.0%.

[0038] The flotation collector floated a domestic phosphate ore sample with high harmful impurities. The original ore P2O5 content was 20.66%, Fe2O3 7.38%, Al2O3 content was 4.25%, and MgO content was 4.82%. The positive flotation process was adopted, with one roughing and two concentrating. The flotation reagent system was: 3.0kg / t original ore as the adjusting agent sodium carbonate, 1.5kg / t original ore as the inhibitor water glass, and 1.5kg / t original ore as the flotation collector.

[0039] Flotation can obtain qualified phosphate concentrate with a P2O5 grade of 36.78%, a Fe2O3 content of 1.54%, an Al2O3 content of 1.34%, and a MgO content of 0.94%, and a P2O5 recovery rate of 89.77%.

[0040] Comparative Example: The weight ratio of the conventional collector is: 20% sodium oleate and sodium laurate (weight ratio 1:1) and 80% water; the raw ore is the same as that in Example 3.

[0041] The flotation collector floated a domestic phosphate ore sample with high harmful impurities. The original ore P2O5 content was 20.66%, Fe2O3 7.38%, Al2O3 content was 4.25%, and MgO content was 4.82%. The positive flotation process was adopted, with one roughing and two concentrating. The flotation reagent system was: 3.0kg / t original ore as the adjusting agent sodium carbonate, 1.5kg / t original ore as the inhibitor water glass, and 1.5kg / t original ore as the flotation collector.

[0042] Flotation can obtain qualified phosphate concentrate with a P2O5 grade of 34.39%, a Fe2O3 content of 3.12%, an Al2O3 content of 2.87%, and a MgO content of 1.67%, and a P2O5 recovery rate of 81.55%.

Claims

1. A flotation collector for phosphate ore with high harmful impurities, characterized in that The phosphate rock collector comprises di-tert-butyl azodicarboxylate C 10 H 18 N2O4 and 3-acetyl-2,5-dimethylthiophene C8H 10 OS.

2. The flotation collector for phosphate ore with high harmful impurities according to claim 1, characterized in that: Di-tert-butyl azodicarboxylate C 10 H 18 N2O4 and 3-acetyl-2,5-dimethylthiophene C8H 10 The ratio of OS is 0.15-40:

1.

3. The flotation collector for phosphate ore with high harmful impurities according to claim 1, characterized in that: The composition of the high-harmful impurity phosphate ore is: P2O5 content 2%-25%, Fe2O3 content 1%-10%, Al2O3 content 1%-10%, and MgO content 0.5%-5%.

4. A flotation collector for high-harmful impurity phosphate ore according to claim 1, 2 or 3, characterized in that: The phosphate rock collector is also used in combination with fatty acid soap.

5. The flotation collector for phosphate ore with high harmful impurities according to claim 4, characterized in that: When the phosphate collector is mixed with fatty acid soap, the total content of di-tert-butyl azodicarboxylate and 3-acetyl-2,5-dimethylthiophene in the mixture is 0.5%-10%.

6. The flotation collector for phosphate ore with high harmful impurities according to claim 5, characterized in that: When the phosphate collector is mixed with fatty acid soap, the total content of di-tert-butyl azodicarboxylate and 3-acetyl-2,5-dimethylthiophene in the mixture is 2%-7%.

7. The flotation collector for phosphate ore with high harmful impurities according to claim 5, characterized in that: When the phosphate collector is mixed with fatty acid soap, the content of di-tert-butyl azodicarboxylate in the mixture is 0.3%-8%, and the content of 3-acetyl-2,5-dimethylthiophene in the mixture is 0.2%-2%.

8. A flotation collector for phosphate ore with high harmful impurities according to claim 4, 5, 6 or 7, characterized in that: The fatty acid soap is selected from one or more of oleic acid soap, stearic acid soap, tall oil soap, lauric acid soap and caprylic acid soap.

9. A use of a flotation collector as claimed in any one of claims 1 to 8, characterized in that , the use described is to use the flotation collector in the positive flotation operation of phosphate ore with high harmful impurities.