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Carbonate inhibitor and preparation method and application thereof

A technology of inhibitors and carbonates, applied in solid separation, flotation, etc., can solve the problems of high cost and difficulty in wastewater treatment, and achieve good environmental benefits, cost savings, and increased differentiation

Inactive Publication Date: 2013-04-24
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All the inhibitors mentioned above can effectively separate phosphorus minerals and carbonate minerals, but due to the certain toxicity of such products, the cost and difficulty of wastewater treatment are relatively large

Method used

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  • Carbonate inhibitor and preparation method and application thereof
  • Carbonate inhibitor and preparation method and application thereof
  • Carbonate inhibitor and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 50g of grass coal (the mass percentage of organic matter is 50%), grind it to a particle size of less than 1mm, mix it with water at a mass ratio of 1:10 and stir evenly, add 50% of the mass percentage of grass coal Na 2 CO 3 , shaking and extracting at 85°C for 60 minutes. After the extraction process is completed, filter the slurry to remove residue (the diameter of the filter hole is 40 μm), and the obtained filtrate is the carbonate inhibitor.

[0023] Taking the three-layer ore of Dayukou phosphate rock in Hubei as the raw ore, the positive flotation effect of the carbonate inhibitor prepared in this example was investigated. The specific flotation method is as follows: Weigh 300g of phosphate rock sample (mineral particle size is 2mm, accounting for 100%) and place it in a rod mill, add 148ml of clean water with a measuring cylinder (grinding concentration is 66.96%). Put the ground pulp into a 0.75L flotation tank, adjust the temperature to 52±2°C, and add...

Embodiment 2

[0031] Take 50g of grass coal (the mass percentage of organic matter is 60%), grind it to a particle size of less than 1mm, mix it with water at a mass ratio of 1:10 and stir evenly, add 25% of grass coal mass percentage Na 2 CO 3 , shaking and extracting at 85°C for 60 minutes. After the extraction process is completed, filter the slurry to remove residue (the diameter of the filter hole is 40 μm), and the obtained filtrate is the carbonate inhibitor.

[0032] According to the method of Example 1, the positive flotation effect of the obtained carbonate inhibitor prepared in this example was investigated.

[0033] The test indicators are shown in Table 2:

[0034] Table 2. Test results of Dayukou three-layer mine

[0035]

[0036] It can be seen from the table that after the raw ore is separated by flotation, the concentrate P 2 o 5 content increased from 17.84% to 22.69%, and the concentrate recovery rate was 94.47%; tailings P 2 o 5 The content is 3.96%, and its re...

Embodiment 3

[0038] Take 50g of grass coal (the mass percentage of organic matter is 70%), grind it to a particle size of less than 1mm, mix it with water at a mass ratio of 1:10 and stir evenly, add 12.5% ​​of grass coal mass percentage Na 2 CO 3 , shaking and extracting at 85°C for 60 minutes. After the extraction process is completed, filter the slurry to remove slag (the diameter of the filter hole is 100 μm), and the obtained filtrate is the carbonate inhibitor.

[0039] According to the method of Example 1, the positive flotation effect of the obtained carbonate inhibitor prepared in this example was investigated.

[0040] The test indicators are shown in Table 3:

[0041] Table 3. Test results of Dayukou three-layer mine

[0042]

[0043] It can be seen from the table that after the raw ore is separated by flotation, the concentrate P 2 o 5 content increased from 17.84% to 22.69%, and the concentrate recovery rate was 91.20%; tailings P 2 o 5 The content is 5.54%, and its ...

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Abstract

The invention discloses a carbonate inhibitor and a preparation method and application thereof. The inhibitor is an organic high-molecular compound containing a large amount of polar groups of carboxyl, hydroxyl, methoxyl, carbonyl, amino and the like. The preparation method includes: mixing grass coal, water and sodium carbonate, oscillating, extracting, filtering and removing dregs, and the obtained filtrate is the carbonate inhibitor. The method is simple in process and free of pollution. By means of the carbonate inhibitor for separation of phosphorite and carbonate minerals, content of MgO in phosphate concentrate and chemical oxygen demand (COD) in tailings can be effectively reduced, use amount of a regulator Na2CO3 in a phosphorite direct flotation process can be reduced, and economical benefit and environment benefit are obtained.

Description

technical field [0001] The invention relates to a carbonate inhibitor and its preparation method and application. Background technique [0002] With the development of domestic phosphate fertilizer production in the direction of high-concentration compound fertilizer, the quality requirements for phosphate concentrate are increasing day by day. Not only requires concentrate P 2 o 5 The grade is high, and the content of harmful impurity MgO is low. However, with the continuous exploitation of phosphate rock resources, high-grade and easy-to-select phosphate rock resources are becoming increasingly exhausted. Therefore, the mining and utilization of medium and low-grade collophosphine has become the demand for the sustainable development of the current phosphorus chemical industry. [0003] At present, collophosite that is difficult to select in my country is mainly concentrated in Hubei, Hunan and other regions, such as Huji and Yichang in Hubei. This type of ore belongs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B03D101/06
Inventor 姜振胜王维民余俊张革利
Owner CHINA NAT OFFSHORE OIL CORP
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