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Recycling method of unfused zircon sand in technical process for preparing zirconium oxychloride by alkaline fusion method

A zirconium oxychloride and process technology, which is applied in the field of recycling of unfused zircon sand, can solve the problem that the recycling rate of unfused zircon sand has not yet been seen, hinders the development of zirconium oxychloride industry, oxygen The problems of reducing the yield of zirconium chloride, etc., achieve the effects of being beneficial to environmental protection, saving zircon sand resources, and improving the utilization rate of raw materials

Active Publication Date: 2015-04-29
山东广通新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Waste of resources and environmental pollution still exist
[0017] 2. Due to the loss of unmelted zircon sand with waste silicon slag, the yield of zirconium oxychloride products is reduced, the production cost is increased, and the economic benefits of enterprises are not good, which seriously hinders the development of zirconium oxychloride industry
[0018] 3. In the process of preparing zirconium oxychloride by alkali fusion method, the recycling method involving unmelted zircon sand with high recycling rate has not been seen yet.

Method used

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  • Recycling method of unfused zircon sand in technical process for preparing zirconium oxychloride by alkaline fusion method
  • Recycling method of unfused zircon sand in technical process for preparing zirconium oxychloride by alkaline fusion method
  • Recycling method of unfused zircon sand in technical process for preparing zirconium oxychloride by alkaline fusion method

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Embodiment 1

[0064] The invention provides a method for recycling unfused zircon sand in the process of preparing zirconium oxychloride by an alkali fusion method. After the water washing and transformation section and before the acidification section, an unfused zircon sand recovery process is added, and the unmelted zircon sand is recovered. Zircon sand is precipitated and separated from the dilute hydrochloric acid solution transferred from water; the operation steps are as follows:

[0065] ①. Dilute hydrochloric acid dissolved water transfer material

[0066] In the dilute hydrochloric acid dissolving reactor, 1 ton of water is transferred to the material (the zirconium content is 40%, according to the alkali hydrolysis rate of 98%, it is converted into 0.628 tons of 65% zircon sand) according to the water transfer: dilute hydrochloric acid (mass ratio) = The ratio of 1:3 is put into dilute hydrochloric acid, and the dilute hydrochloric acid comes from the pickling solution produced b...

Embodiment 2

[0077] The invention provides a method for recycling unfused zircon sand in the process of preparing zirconium oxychloride by an alkali fusion method. After the water washing and transformation section and before the acidification section, an unfused zircon sand recovery process is added, and the unmelted zircon sand is recovered. Zircon sand is precipitated and separated from the dilute hydrochloric acid solution transferred from water; the operation steps are as follows:

[0078] ①. Dilute hydrochloric acid dissolved water transfer material

[0079] In the dilute hydrochloric acid dissolving reactor, 1 ton of water is transferred to the material (the zirconium content is 40%, according to the alkali hydrolysis rate of 98%, it is converted into 0.628 tons of 65% zircon sand) according to the water transfer: dilute hydrochloric acid (mass ratio) = The ratio of 1:2.5 is put into dilute hydrochloric acid, and the dilute hydrochloric acid comes from the pickling solution produced...

Embodiment 3

[0090] The invention provides a method for recycling unfused zircon sand in the process of preparing zirconium oxychloride by an alkali fusion method. After the water washing and transformation section and before the acidification section, an unfused zircon sand recovery process is added, and the unmelted zircon sand is recovered. Zircon sand is precipitated and separated from the dilute hydrochloric acid solution transferred from water; the operation steps are as follows:

[0091] ①. Dilute hydrochloric acid dissolved water transfer material

[0092] In the dilute hydrochloric acid dissolving reactor, 1 ton of water is transferred to the material (the zirconium content is 40%, according to the alkali hydrolysis rate of 98%, it is converted into 0.628 tons of 65% zircon sand) according to the water transfer: dilute hydrochloric acid (mass ratio) = The ratio of 1:2.8 is put into dilute hydrochloric acid, and the dilute hydrochloric acid comes from the pickling solution produced...

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Abstract

The invention relates to a recycling method of unfused zircon sand in a technical process for preparing zirconium oxychloride by an alkaline fusion method, and belongs to the field of preparation methods of zirconium compounds. The technical process for preparing zirconium oxychloride by the alkaline fusion method comprises the following steps of alkaline fusion, water washing, transformation, acidification, crystallization, acid pickling, centrifugation and drying. The recycling method is characterized in that a working procedure of recycling unfused zircon sand is added after the steps of water washing and transformation and before the step of acidification so as to precipitate and separate the unfused zircon from a dilute hydrochloric acid solution of a water transformation material. The working procedure of recycling unfused zircon sand comprises the following steps: (1) dissolving the water transformation material by a diluted hydrochloric acid; (2) leaving the obtained solution to stand for precipitation; (3) performing solid-liquid separation; (4) repetitively washing unfused sand collected in the step (3) with clean water until the washing water is clear; (5) drying the washed unfused sand in the step (3), and supplying the dried unfused sand for alkaline fusion. Through the adoption of the recycling method disclosed by the invention, the recycling rate of the unfused zircon sand reaches 97%, and the recycled zircon sand can be recycled as raw zircon sand, so that the productive rate of zirconium oxychloride products is increased, and the production cost is reduced.

Description

technical field [0001] The invention relates to a method for recycling unfused zircon sand in the process of preparing zirconium oxychloride by an alkali fusion method. A method for preparing a compound of zirconium. Background technique [0002] Zirconium was first discovered in zircon (Zircon) by German chemist Martin Heinrich Kaproth in 1789, and zirconium dioxide was prepared. [0003] Zircon is the main zirconium industrial mineral. Among zircon minerals, zircon minerals are the most widely distributed, the most types, and the largest reserves. At present, coastal placer mines are the main source of zircon products. According to statistics in 2005, ZrO 2 In total, the world's total reserves of zircon sand are about 38 million tons, and China's zirconium reserves are about 500,000 tons. [0004] Zircon sand is zircon (ZrSiO) obtained by processing and beneficiation of zircon minerals. 4 ) concentrate, its theoretical composition: ZrO 2 The content is 67.21%. SiO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/00
CPCC01G25/00
Inventor 吴振宇
Owner 山东广通新材料有限公司
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