Process for producing metal magnesium by phosphorus furnace tail gas

A technology of phosphorus furnace tail gas and metal magnesium, which is applied in the field of utilization of tail gas in the production of yellow phosphorus by electric furnace method, to achieve the effects of enhancing resistance, reducing pollution and reducing environmental protection

Inactive Publication Date: 2005-03-23
李乾宽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there has been no report on the use of yellow ph...

Method used

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  • Process for producing metal magnesium by phosphorus furnace tail gas
  • Process for producing metal magnesium by phosphorus furnace tail gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: fully use phosphorus furnace tail gas as fuel to produce metallic magnesium

[0014] The specific process flow is shown in Figure 1. A sealed tail gas delivery system consisting of a gas pipeline, a high-pressure gas fan and a secondary line is installed between the adjacent electric furnace yellow phosphorus production unit and the Pidgeon method metal magnesium production unit. The system extracts and pressurizes the exhaust gas from the phosphorus furnace to the calcined white rotary kiln, reduction furnace and refining furnace of the Pidgeon process magnesium production plant, and uses an appropriate amount of air for combustion, and burns through the gas burners installed in the above equipment , calcining dolomite into magnesium lime, reducing metal magnesium, and melting magnesium when metal magnesium is refined. Among them, the temperature of the rotary kiln and reduction furnace is controlled at about 1200°C, and the temperature of the refining fu...

Embodiment 2

[0015] Embodiment 2: use coal combustion to cooperate with phosphorus furnace tail gas as fuel

[0016] The specific process flow is shown in Figure 2. Between the adjacent electric furnace yellow phosphorus production unit and the Pidgeon method metal magnesium production unit, a sealed tail gas delivery system consisting of a gas pipeline, a high-pressure gas fan and a secondary line is installed. The system extracts and pressurizes the tail gas of the phosphorus furnace to the calcined white rotary kiln and refining furnace of the Pidgeon method magnesium production device, and uses an appropriate amount of air for combustion. The gas burner installed in the equipment burns the dolomite Calcined into magnesium lime at 1200°C, melting magnesium at 700-750°C during metal magnesium refining; and building the reduction furnace into a coal-fired reverberatory furnace, using coal with a calorific value higher than 20930kJ / kg as fuel, reaching 1200°C Requirements, and stable for 8...

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Abstract

This invention discloses a method of producing magnesium with phosphorus furnace tail gas, which relates to the production of alkali metal magnesium and utilization of phosphorus furnace tail gas, the purpose of this invention is to supply a technology of producing magnesium with yellow phosphorus electric furnace tail gas. This invention fixes hermetical transporting system composed of gas transmitting channel, high pressure gas fan and subsidiary line between close electric furnace yellow phosphorus producing devices and Pijiang method magnesium producing devices. Through this system phosphorus furnace tail gas is drawed out raised pressure to calcining white rotary kiln, deoxidizing furnace and refining furnace of Pijiang method producing magnesium devices, and burned by gas-fired burner set in the devices, which can be used to calcining white and deoxidize magnesium in Pijiang method producing magnesium or as heat source of melting magnesium when refining magnesium. There is valve on the gas transmitting channel and subsidiary line, which is used to adjust tail gas quantity and pressure.

Description

technical field [0001] The invention mainly relates to the production technology of alkaline earth metal magnesium, and also relates to the utilization technology of tail gas in yellow phosphorus production by electric furnace method. Background technique [0002] As we all know, there are two methods of producing magnesium metal: one is the electrolysis method, which consumes a lot of power and requires magnesium chloride raw materials; the other is the thermal reduction method, and the most widely used method is the silicon thermal method, also known as "Pidgeon method", this method uses magnesium-containing minerals such as dolomite as raw materials, uses ferrosilicon as reducing agent, uses fluorite as catalyst, conducts solid-state reaction at about 1200 ° C, and performs selective reduction in vacuum state Production of magnesium metal. This law has been used for hundreds of years. In recent years, people have made some improvements to the Pidgeon process, such as Ch...

Claims

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Application Information

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IPC IPC(8): C22B26/22
Inventor 李乾宽王述强
Owner 李乾宽
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