A kind of preparation technology of small particle size cerium carbonate

A preparation process, cerium carbonate technology, applied in the preparation/treatment of rare earth metal compounds, rare earth metal carbonates, etc., can solve problems that are not conducive to mass production of cerium carbonate, uneven heat transfer speed, crystal structure of cerium carbonate powder, Problems such as uneven shape, shape and size

Active Publication Date: 2021-06-22
内蒙古卡乐思稀土环保颜料有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat transfer rate in each part of the reactor of this method is not uniform, so in many cases, the crystal structure, shape morphology or size of the final prepared cerium carbonate powder is not uniform
Therefore, increasing the size of the reactor also has certain limitations, which is not conducive to the mass production of cerium carbonate

Method used

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  • A kind of preparation technology of small particle size cerium carbonate
  • A kind of preparation technology of small particle size cerium carbonate
  • A kind of preparation technology of small particle size cerium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Add 1 ton of cerium carbonate into the batching tank, add 1.2 cubic meters of water in the batching tank, and stir at a constant speed of 600 rpm for 40 minutes to adjust the slurry. The adjusted cerium carbonate slurry is passed through a 60-mesh sieve and passed through a sand mill for 60 hours, and the sand mill is 750 rpm to uniformly screen the sanded slurry samples for quality inspection. D. 50 2.0 micron, add 5wt% polyethylene glycol, pH value is 8, stir at 750 rpm for 1 hour. The cerium carbonate slurry is spray-dried by an LPG high-speed centrifugal spray dryer, the drying temperature is 100°C, and the drying time is 3 hours to obtain a small particle size cerium carbonate particle size D 50 = 2.5 microns, total amount TREO = 62wt%, purity 99.9%, bulk density 0.6g / cm 3 .

Embodiment 2

[0045]Add 1 ton of cerium carbonate into the batching tank, add 1.5 cubic meters of water in the batching tank, and stir at a constant speed of 600 rpm for 30 minutes to adjust the slurry. The adjusted cerium carbonate slurry was passed through a 60-mesh sieve and passed through a sand mill for 48 hours, and the sand mill was 750 rpm to uniformly screen the sanded slurry samples for quality inspection. D. 50 1.8 micron, add 8wt% polyethylene glycol, pH value is 8, stir at 750 rpm for 2 hours. The cerium carbonate slurry is spray-dried by an LPG high-speed centrifugal spray dryer, the drying temperature is 80°C, and the drying time is 5 hours to obtain a small particle size cerium carbonate particle size D 50 = 2 microns, total amount TREO = 63wt%, purity 99.9%, bulk density 0.56g / cm 3 .

Embodiment 3

[0047] Add 1 ton of cerium carbonate into the batching tank, add 2 cubic meters of water in the batching tank, stir at a constant speed of 600 rpm for 30 minutes to adjust the slurry. The adjusted cerium carbonate slurry was passed through a 60-mesh sieve and passed through a sand mill for 48 hours, and the sand mill was 750 rpm to uniformly screen the sanded slurry samples for quality inspection. D. 50 2.0 μm, add 10% polyethylene glycol, pH value is 10, stir at 750 rpm for 2 hours. The cerium carbonate slurry is spray-dried by an LPG high-speed centrifugal spray dryer, the drying temperature is 80°C, and the drying time is 5 hours to obtain a small particle size cerium carbonate particle size D 50 = 2.1 microns, total amount TREO = 65wt%, purity 99.9%, bulk density 0.5g / cm 3 .

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Abstract

The invention relates to a preparation process of small-sized cerium carbonate. The process comprises the following steps: (1) adding water to cerium carbonate, stirring, and mixing to obtain cerium carbonate slurry; (2) preparing the cerium carbonate slurry obtained in step (1). Cerium slurry is sieved and sand-milled to obtain sand-milled cerium carbonate slurry; (3) in the sand-milled cerium carbonate slurry obtained in step (2), add a dispersant and continue grinding; (4 ) spray, dry, that is. The cerium carbonate prepared by the method of the invention has small particle size, high total amount, high purity, high activity and low bulk density, which just matches the condition requirements of the raw material preparation process of cerium sulfide. The production cost is low, mass production is possible, and the output is high.

Description

[0001] field of invention [0002] The invention relates to the technical field of raw material preparation, in particular to a preparation process of small-sized cerium carbonate. [0003] technical background [0004] Cerium carbonate is an important raw material for the preparation of cerium sulfide pigments, and the particle size, bulk density and activity of cerium carbonate have a great influence on the preparation of cerium sulfide. The particle size of the cerium sulfide synthesized by the synthesis of large particles of cerium carbonate is generally large, which affects the coloring power and hiding power of the product. Therefore, before the preparation of cerium sulfide, the raw material cerium carbonate should be treated with a small particle size. The price of small-sized cerium carbonate sold in the market is generally high, and the activity of cerium carbonate is low, and the bulk density is high, which cannot meet the requirements for use. [0005] Usually, cer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/10C01F17/247
CPCC01P2004/61C01P2006/80C01F17/247
Inventor 刘建钢翟纪敏王玉峰赵兴国
Owner 内蒙古卡乐思稀土环保颜料有限责任公司
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