Preparation process of cerous caibonate with small particle size

A preparation process, cerium carbonate technology, applied in the direction of rare earth metal carbonates, rare earth metal compounds, inorganic chemistry, etc., can solve the problem of increasing the size of the reactor, uneven heat transfer speed, crystal structure and shape of cerium carbonate powder Uneven size and other problems, to achieve the effect of low total cost, simple process and easy operation

Active Publication Date: 2019-04-19
内蒙古卡乐思稀土环保颜料有限责任公司
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  • Summary
  • 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 ceri

Method used

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  • Preparation process of cerous caibonate with small particle size
  • Preparation process of cerous caibonate with small particle size
  • Preparation process of cerous caibonate with small particle size

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 1 ton of cerium carbonate to the batching tank, add 1.2 cubic meters of water to the batching tank, and stir at a constant speed of 600 rpm for 40 minutes to adjust the slurry. Pass the adjusted cerium carbonate slurry through a 60-mesh sieve and pass the adjusted slurry through a sand mill for 60 hours. The sand mill uniformly screens the sanded slurry samples at 750 revolutions per minute and conducts quality inspection. D 50 The diameter is 2.0 microns, 5wt% polyethylene glycol is added, the PH value is 8, and it is stirred at 750 rotation speed for 1 hour. The cerium carbonate slurry was spray-dried through the LPG high-speed centrifugal spray dryer at a drying temperature of 100°C and a drying time of 3 hours to obtain a small particle size cerium carbonate particle size D 50 =2.5 microns, total TREO=62wt%, purity 99.9%, bulk density 0.6g / cm 3 .

Embodiment 2

[0043] Add 1 ton of cerium carbonate to 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. Pass the adjusted cerium carbonate slurry through a 60-mesh sieve and pass the adjusted slurry through a sand mill for 48 hours. The sand mill evenly screens the sanded slurry samples at 750 revolutions per minute for quality inspection. D 50 It is 1.8 microns, 8wt% polyethylene glycol is added, the PH value is 8, and it is stirred at 750 rotation speed for 2 hours. The cerium carbonate slurry was spray-dried through the LPG high-speed centrifugal spray dryer at a drying temperature of 80°C and a drying time of 5 hours to obtain a small particle size of cerium carbonate particle size D 50 = 2 microns, total TREO = 63wt%, purity 99.9%, bulk density 0.56g / cm 3 .

Embodiment 3

[0045] Add 1 ton of cerium carbonate to the batching tank, add 2 cubic meters of water to the batching tank, and stir at a constant speed of 600 rpm for 30 minutes to adjust the slurry. Pass the adjusted cerium carbonate slurry through a 60-mesh sieve and pass the adjusted slurry through a sand mill for 48 hours. The sand mill evenly screens the sanded slurry samples at 750 revolutions per minute for quality inspection. D 50 The diameter is 2.0 microns, 10% polyethylene glycol is added, the pH is 10, and the mixture is stirred at 750 rotation speed for 2 hours. The cerium carbonate slurry was spray-dried through the LPG high-speed centrifugal spray dryer at a drying temperature of 80°C and a drying time of 5 hours to obtain a small particle size of cerium carbonate particle size D 50 = 2.1 microns, total TREO = 65wt%, purity 99.9%, bulk density 0.5g / cm 3 .

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Abstract

The invention relates to a preparation process of cerous caibonate with a small particle size. The process includes the following steps: (1) adding water into cerous carbonate, stirring, and slurryingto obtain cerous carbonate slurry; (2) sieving the cerous carbonate slurry obtained in the step (1), carrying out sand milling processing to obtain sand milled cerous carbonate slurry; and (3) addinga dispersing agent into the sand milled cerous carbonate slurry obtained in the step (2) for continuous grinding; and (4) spraying and drying to obtain the cerous caibonate with a small particle size. The cerous carbonate prepared by the method of the invention has the advantages of small particle size, high total amount, high purity, high activity and low bulk density, exactly meets the condition requirements of the raw material preparation process of strontium sulfide, is low in production cost, can be produced in batches, and is high in output.

Description

Invention field [0001] The invention relates to the technical field of raw material preparation, in particular to a preparation process of small particle size cerium carbonate. technical background [0002] Cerium carbonate is an important raw material for the preparation of cerium sulfide pigments. The particle size, bulk density and activity of cerium carbonate have a great influence on the preparation of cerium sulfide. The cerium sulfide particles prepared by the synthesis of large particles of cerium carbonate are generally larger in size, which affects the coloring power and hiding power of the product. Therefore, the raw material cerium carbonate should be treated with a small particle size before the preparation of cerium sulfide. The small particle size cerium carbonate sold on the market generally has a higher price, and the activity of cerium carbonate is lower, and the bulk density is higher, which cannot meet the requirements for use. [0003] In general, cerium carbo...

Claims

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Application Information

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IPC IPC(8): C01F17/00
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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