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Slurry stabilizing agent and applications thereof

A slurry stabilizer and stabilization technology, applied in the field of slurry stability and application, can solve the problems of limited effect of slurry stability, high viscosity and high energy consumption, achieve high popularization and application value, improve stability, Easy-to-use effects

Inactive Publication Date: 2012-06-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent ZL011380632 proposes a method of preparing slurry with a wide particle size distribution by connecting mills in parallel. This method can improve the gradation of particles in the slurry and strengthen the interaction between particles, but it cannot improve the slurry at low shear rates. Viscosity under the low, so the effect of improving the stability of the slurry is limited
Chinese invention patent application 87101648 proposes a method to improve the stability of the slurry by controlling the ion content in the slurry. Although this method can weaken the influence of calcium and magnesium ions on the performance of the slurry, it cannot slow down the particle size in the slurry under various states. Sedimentation speed
Chinese invention patent application 02133384.X proposes a method for making slurry, which considers reducing the sedimentation velocity by refining the particle size of the particles in the slurry, but this method consumes too much energy and has too high viscosity, so it is not applicable Preparation and delivery of slurries on the micron scale

Method used

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  • Slurry stabilizing agent and applications thereof
  • Slurry stabilizing agent and applications thereof
  • Slurry stabilizing agent and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] In 1000g of Datong coal water slurry with a concentration of 64% (the average particle size of coal particles is 42.0μm), add 1g of 1% stabilizer solution (molecular weight is 200,000, maleic acid grafting rate is 12%, acrylic acid The grafting rate of the ester is 1%, the molecular weight is 2000, and the dosage is 10 ppm), the slurry is prepared by stirring for 5 minutes, the rheological properties are measured, and the static stability is observed by standing.

Embodiment 2

[0012] In 1000g of Datong coal-water slurry with a concentration of 64% (the average particle size of coal particles is 42.0μm), add 2g of 1% stabilizer solution (molecular weight is 200,000, maleic acid grafting rate is 12%, acrylic acid The grafting rate of the ester is 1%, the molecular weight is 2000, and the dosage is 20 ppm), the slurry is prepared by stirring for 5 minutes, the rheological properties are measured, and the static stability is observed by standing.

Embodiment 3

[0014] In 1000g of Datong coal water slurry with a concentration of 64% (the average particle size of coal particles is 42.0μm), add 8g of 1% stabilizer solution (molecular weight 65000, maleic acid grafting rate 12%, acrylic acid The grafting rate of the ester is 1%, the dosage is 80ppm), the slurry is prepared by stirring for 5 minutes, the rheological properties of the slurry are measured, and the static stability is observed by standing.

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Abstract

The invention discloses a slurry stabilizing agent and applications thereof. A polyacrylamide maleic acid polymethyl acrylate grafted copolymer is adopted; the molecular weight of polyacrylamide is 50,000-2,000,000; the grafting rate of polymethyl acrylate is 1-15 percent; the grafting rate of maleic acid is 2-30 percent; and the grafting rates refer to the weight ratio of polymethyl acrylate to polyacrylamide and the weight ratio of maleic acid to polyacrylamide. The rheologic property of slurry is improved by utilizing the polyacrylamide in molecular structure; metal ions are chelated by utilizing the grafted maleic acid in molecular structure; and inorganic minerals are dispersed by utilizing the polymethyl acrylate, wherein the addition is 10-150ppm only. The slurry stabilizing agent disclosed by the invention is capable of obviously improving the rheologic property of the slurry and enhancing the stability of the slurry, has a stabilizing effect on various slurries, enables the slurries to show proper viscosities at different shearing rates, is convenient to operate, low in use level and lower in cost and has a higher popularization and application value.

Description

Technical field [0001] The invention relates to a method for improving the stability of the slurry, especially the slurry of coal water slurry, water coke slurry, limestone and nano iron oxide slurry, with a high-performance slurry stabilizer. Background technique [0002] Paste materials have been widely used in more and more fields and have received increasing attention. However, since the slurry material is a solid and liquid two-phase dispersion system, the solids are prone to precipitation and stratification in the liquid, which affect the performance of the slurry. Therefore, improving the stability of the slurry, improving the rheological properties of the slurry, and reducing the content of free ions in the slurry have high practical value, and related technologies have broad application prospects. At present, in improving the stability of the slurry, there are methods such as using stabilizers to increase the viscosity of the system, using precipitating agents to elimin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C01F11/18C01G49/06B82Y40/00C08F265/10
Inventor 胡柏星何其慧刘波
Owner NANJING UNIV
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