A kind of device and preparation method for preparing heavy magnesium carbonate with heavy magnesium water

Abstract

The invention discloses a device for preparing heavy magnesium carbonate from heavy magnesium water and a preparation method, relating to the field of inorganic salt synthesis. The device comprises aheating pipe, a settling tank, a reaction tank, a discharging auger, a stirring tank, a sampling hole, filtering equipment and drying equipment, wherein a steam inlet and a heavy magnesium water inletare formed in one end of the heating pipe; a first reaction kettle stirrer is arranged in the reaction tank; a sampling pipeline is arranged on the left side of the lower end of the settling tank; and a reflux pipeline is arranged on the right side of the lower end of the settling tank. The preparation method comprises the following steps: heating heavy magnesium water with steam, carrying out adecomposition reaction in the reaction tank, entering the settling tank to settle, discharging large-particle materials by the discharging auger, pulping, filtering, and drying, thereby obtaining theheavy magnesium carbonate. The device disclosed by the invention has the beneficial effects that the device disclosed by the invention is simple and compact in equipment, the equipment is normal pressure equipment, and the pH value of the reaction is neutral; the equipment material requirement is low, and the cost is low; and in the preparation method, in addition to the heavy magnesium water andsteam, other extra materials are not added, and the product quality is easy to control.

Description

technical field [0001] The invention mainly relates to the field of inorganic salt synthesis, in particular to a device and a preparation method for preparing heavy magnesium carbonate with heavy magnesium water. Background technique [0002] As an important product of the magnesium salt industry, heavy magnesium carbonate is widely used in food, cosmetics and pharmaceutical industries. In recent years, with the continuous advancement of application technology, the application field of heavy magnesium carbonate has been continuously expanded, and many new uses have been developed, such as: used in rubber, medicine, insulating materials, dental preparations, advanced glass, food and various chemical industries Product additives and improvers, etc. At present, the demand for heavy magnesium carbonate in the world is increasing continuously, and the market of heavy magnesium carbonate in my country is also in the development stage, and the application prospect is very broad. ...

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Problems solved by technology

[0003] At present, there are two main methods for producing heavy magnesium carbonate: the first method is to grind and process natural magnesite to produce heavy magnesium carbonate, but this process does not take any impurity removal means, and the produced heavy magnesium carbonate The quality of the raw material has a great dependence on the grade of the ore, and the heavy magnesium carbonate produced by this process has poor fluidity, which greatly limits its scope of use; the second method is to react with soluble magnesium salt and soda ash, after aging, Filtration washing, drying and other processes are used to produce heavy magnesium carbonate. The soda ash used in this process must be excessive. The filtrate after filtration is alkaline and needs to be neutralized. The waste water needs to be discharged after treatment. The high cost affects the market competitiveness of products, so it is urgent to find a new device and preparation method for producing heavy magnesium carbonate

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