Preparation method and application of modified ferrophosphorus powder
A ferrophosphorus powder, modified technology, applied in chemical instruments and methods, fibrous fillers, coatings, etc., can solve the problems of agglomeration, affect the performance of coatings, difficult to redispersion, etc., and achieve increased pore volume and specific surface area. The effect of increasing and decreasing true density
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0031] The preparation method of modified ferrophosphorus powder specifically comprises the following steps:
[0032] Step 1. Mix the raw phosphate iron ore powder with a particle size of less than 300 mesh with the acid solution, stir and impregnate to obtain a suspension A; here, the particle size is selected to be less than 300 mesh and corresponds to 48 microns. When the particle size is greater than 48 μm, it is not conducive to ferrophosphorus. Mineral powder reacts with acid.
[0033] Step 2, adjusting the pH value of the suspension A to 7-9, adding dropwise a mixed solution of tetrapropylammonium bromide, a silicon source and a pore-enlarging agent, performing a hydrothermal reaction, and preparing a suspension B;
[0034] Step 3, adjusting the pH value of the suspension B to be neutral, adding a dispersant, and performing wet ball milling to prepare a slurry;
[0035] Step 4: Spray drying the liquid slurry to obtain solid modified ferrophosphorus powder.
[0036] In...
Embodiment 1
[0055] Take 100 parts by weight of ordinary commercially available ferrophosphorus powder with a particle size greater than 300 mesh and mix it with a phosphoric acid solution with a pH of 2. After mixing, the solid content of the suspension is 40%, and pickle at a temperature of 120°C for 4 hours. Then dropwise adding sodium hydroxide solution to the pickling solution to adjust the pH to be 8.5, slowly add 0.02 parts by weight of tetrapropylammonium bromide, 0.02 parts by weight of tetrapropylammonium bromide and 0.02 parts by weight of hexamethylene The mixed solution of amine was reacted at 200°C for 72h. Add 0.1 weight part of low molecular weight sodium polyacrylate, 0.1 weight part of sodium hexametaphosphate to the suspension after hydrothermal reaction, adopt ZrO 2 The grinding balls are wet-milled, and the particle size after grinding is less than 1300 mesh and more than 85%. The slurry obtained by grinding is spray-dried, the outlet temperature of the spray-drying i...
Embodiment 2
[0057]Take 80 parts by weight of ordinary commercially available ferrophosphorus powder with a particle size greater than 400 mesh and mix it with a citric acid solution with a pH of 4. After mixing, the solid content of the suspension is 40%, and acid leaching for 3 hours at a temperature of 140°C. Then dripping ammonia solution to the pickling solution to adjust the pH is 7.5, slowly dripping the mixed solution of the tetrapropylammonium bromide of 0.1 weight part, the silica sol of 0.2 weight part and the hexamethyleneimine of 0.5 weight part, React at 180°C for 48h. Add 0.5 parts by weight of polyvinylpyrrolidone and 0.5 parts by weight of sodium hexametaphosphate to the suspension after the hydrothermal reaction, and use agate balls for wet ball milling. After grinding, the particle size is less than 1000 mesh and exceeds 90%. The slurry obtained by grinding is spray-dried, the outlet temperature of the spray-drying is 110° C., and the dust is collected to obtain the modi...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size (mesh) | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More