The vacuum pump system for magnesium refinery is a critical component in the efficient and sustainable production of magnesium. By leveraging advanced vacuum technology, this system ensures high-quality results in each phase of the production process, from dolomite calcination to the reduction of magnesium. This article delves into the working principles, production materials, energy-saving measures, and the refining process supported by the vacuum pump system in magnesium refineries.

1. Working Principle of the Vacuum Pump System for Magnesium Refinery

A vacuum pump system is essential in magnesium refinery, where it creates the low-pressure environment necessary for magnesium reduction. By minimizing air and other gases, the vacuum pump enables effective heat distribution and precise control over various stages, including calcination, pelletizing, and magnesium reduction. The following sections outline the production materials used in the magnesium refining process and how each contributes to the efficiency of the vacuum pump system in magnesium refinery.

2. Production Material Requirements

1) Dolomite
Dolomite must be 10-40 mm in particle size, ensuring minimal deviation beyond these limits. The chemical composition is also critical:

• MgO: 19-21%
• CaO: 30-33%
• SiO2: <0.5%
• Fe2O3: <0.5%
• Al2O3: <0.5%
• Na2O: <0.005%
• K2O: <0.005%
• Mn: <0.0005%

The ideal CaO/MgO ratio is 1.394 (mass ratio) or 1.0 (molar ratio).

2) Ferrosilicon
The selected ferrosilicon contains ≥75% silicon, optimizing the reduction reaction.

3) Fluorite Powder
With a CaF2 content of over 90% and a particle size of 200 mesh, fluorite powder is key to the refining process.

3. Energy-Saving Measures in the Production Line

Energy efficiency is paramount in magnesium production, and the vacuum pump system incorporates several measures to optimize performance and reduce costs:

• Advanced Burners: Use energy-saving burners with automated air distribution to ensure complete combustion and reduce fuel waste.
• Refractory Bricks: The rotary kiln’s design includes light-weight, insulating outer bricks and a composite inner layer to reduce heat dissipation.
• Vertical Preheater: Positioned at the rotary kiln’s end, the preheater utilizes high-temperature flue gas to partially decompose materials, enhancing efficiency.
• Vertical Cooler: The kiln head’s vertical cooler reuses the heat from calcined material to preheat secondary air, improving thermal efficiency.
• Dust Collection Systems: Cyclone and pulse bag dust collectors remove dust effectively, ensuring minimal environmental impact.

4. Production Process Using the Vacuum Pump System

The magnesium refining process relies on a vacuum pump system to maintain optimal conditions for each production stage. A mature and reliable Pidgeon magnesium smelting process is used to produce high-purity magnesium through several phases:

Raw Material Storage: Dolomite is stored in a dedicated yard, while ferrosilicon and fluorite powder are stored in the factory warehouse.

Dolomite Calcination: Preheated dolomite is introduced to the rotary kiln, where it is heated to 1250°C, enabling calcination:

CaCO3•MgCO3 → CaO•MgO + 2CO2

The vacuum pump system supports dust control and air quality during calcination, reducing CO2 and particulate emissions.

Ball Workshop: Calcined dolomite, ferrosilicon, and fluorite powder are mixed, ground, and pressed into pellets. The ball mill is powered by a high-voltage motor, reducing energy use compared to conventional low-voltage systems. Dust removal systems ensure clean air in the workspace, enhancing worker safety.

Reduction and Refining: Pellets are heated in the reduction furnace, using rapid regenerative combustion technology. Magnesium vapor is condensed into crude magnesium, which undergoes further refining to yield pure magnesium. The entire system is monitored and controlled via a PLC system from the main control room.

The vacuum pump system for magnesium refinery plays a vital role in the smelting and refining process, supporting high-efficiency production while adhering to environmental standards. With innovative energy-saving features, advanced materials, and automated controls, this system enables magnesium refineries to maintain high-quality output and sustainable operations.

Contact Us
For more information about the vacuum pump system for magnesium refinery, contact Nuoxutech at contact@nuoxutech.com or visit our Blogger nuoxutech.blogspot.com .You can also reach us on WhatsApp at +86 13849062209.Our team is ready to provide you with professional service and support.

Keywords: vacuum pump system, magnesium refinery, vacuum pump system for magnesium refinery, dolomite calcination, energy-saving rotary kiln, Pidgeon process magnesium refining