阅读说明：本技术 一种氯化富钇稀土浓缩结晶新方法 (Novel method for concentrating and crystallizing yttrium-rich rare earth chloride ) 是由 郑义 郑景丰 周晖东 黄秀 陈双华 吴福军 赵陈桂 梁华庭 梁华陆 于 2020-06-02 设计创作，主要内容包括：本发明涉及化工生产技术领域,且公开了一种氯化富钇稀土浓缩结晶新方法,包括以下步骤：S1、关闭真空浓缩罐底部球阀,按量加入稀土料液；S2、开启真空阀、开启真空系统、开启夹套蒸汽阀门；S3、开始正常蒸发浓缩工作,并做好温度与真空度记录；S4、浓缩至符合要求后,关闭蒸汽阀门、真空阀门、真空系统；结合富钇氯化稀土本身结晶特点,通过控制稀土料液浓度大小、浓缩真空度等生产条件,得到一种颗粒状的富钇氯化稀土,提高了产品稀土总量品位,减少杂质含量,在生产线通过测定浓缩结晶时体系真空度和沸腾温度对稀土产品含量影响,建立了一套生产经验数据,并以此套数据代替炉前分析,控制生产,实现了产品质量平稳目的。(The invention relates to the technical field of chemical production, and discloses a novel method for concentrating and crystallizing yttrium-rich rare earth chloride, which comprises the following steps: s1, closing a ball valve at the bottom of the vacuum concentration tank, and adding rare earth feed liquid according to the amount; s2, opening a vacuum valve, opening a vacuum system and opening a jacket steam valve; s3, starting normal evaporation and concentration work, and making temperature and vacuum degree records; s4, after concentrating to meet the requirements, closing a steam valve, a vacuum valve and a vacuum system; the method combines the crystallization characteristics of the yttrium-rich rare earth chloride, obtains the granular yttrium-rich rare earth chloride by controlling the production conditions such as the concentration of the rare earth feed liquid, the concentration vacuum degree and the like, improves the total grade of the rare earth product, reduces the impurity content, establishes a set of production experience data by measuring the influence of the system vacuum degree and the boiling temperature on the content of the rare earth product during concentration and crystallization in a production line, replaces the analysis in front of a furnace with the set of data, controls the production and realizes the purpose of stable product quality.)

1. A novel method for concentrating and crystallizing yttrium-rich rare earth chloride is characterized by comprising the following steps:

s1, closing a ball valve at the bottom of the vacuum concentration tank, and adding rare earth feed liquid according to the amount;

s2, opening a vacuum valve, opening a vacuum system and opening a jacket steam valve;

s3, starting normal evaporation and concentration work, and making temperature and vacuum degree records;

s4, after concentrating to meet the requirements, closing a steam valve, a vacuum valve and a vacuum system;

s5, after cooling the feed liquid to a certain temperature, opening a discharge valve, and allowing the feed liquid to enter a centrifuge for dewatering for a period of time;

and S6, packaging the product according to the packaging requirement.

2. The novel method for concentrating and crystallizing yttrium-rich rare earth chloride according to claim 1, wherein the method comprises the following steps: the requirement in the step S4 is that the concentration is controlled to be 155g-165g rare earth oxide/L.

3. The novel method for concentrating and crystallizing yttrium-rich rare earth chloride according to claim 1, wherein the method comprises the following steps: the temperature in step S5 is 35 ℃ or lower.

4. The novel method for concentrating and crystallizing yttrium-rich rare earth chloride according to claim 1, wherein the method comprises the following steps: the time in the step S5 is 35-45 min.

Technical Field

The invention relates to the technical field of chemical production, in particular to a novel method for concentrating and crystallizing yttrium-rich rare earth chloride.

Background

In rare earth salt compounds, chloride crystals of heavy rare earth are crystallized in the traditional process, one method is to use open trial evaporation to enable materials to finally form pasty crystals, and the product has fine particles, high impurities and poor production operability.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a novel method for concentrating and crystallizing yttrium-rich rare earth chloride, which solves the problems that the conventional process for crystallizing the chloride of heavy rare earth utilizes open trial evaporation to finally form pasty crystals on materials, the product has fine particles, high impurities and poor production operability.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a novel method for concentrating and crystallizing yttrium-rich rare earth chloride comprises the following steps:

s1, closing a ball valve at the bottom of the vacuum concentration tank, and adding rare earth feed liquid according to the amount;

s2, opening a vacuum valve, opening a vacuum system and opening a jacket steam valve;

s3, starting normal evaporation and concentration work, and making temperature and vacuum degree records;

s4, after concentrating to meet the requirements, closing a steam valve, a vacuum valve and a vacuum system;

s5, after cooling the feed liquid to a certain temperature, opening a discharge valve, and allowing the feed liquid to enter a centrifuge for dewatering for a period of time;

and S6, packaging the product according to the packaging requirement.

Preferably, the requirement in step S4 is that the concentration is controlled to 155g-165g rare earth oxide/liter.

Preferably, the temperature in step S5 is 35 ℃ or lower.

Preferably, the time in step S5 is 35min to 45 min.

(III) advantageous effects

The invention provides a novel method for concentrating and crystallizing yttrium-rich rare earth chloride, which has the following beneficial effects:

1. the invention combines the crystallization characteristics of the yttrium-rich rare earth chloride, obtains the granular yttrium-rich rare earth chloride by controlling the production conditions such as the concentration of the rare earth feed liquid, the concentration vacuum degree and the like, improves the total content grade of the rare earth product, and reduces the impurity content.

2. According to the invention, a set of production experience data is established by measuring the influence of the vacuum degree and boiling temperature of the system on the content of the rare earth product during concentration and crystallization in the production line, and the set of data replaces stokehole analysis to control production, so that the purpose of stable product quality is realized.

Drawings

FIG. 1 is a flow chart of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.