Pidgeon process for making magnesium and boronic mineralizer for partially replacing fluorite

A technology of mineralizing agent and magnesium smelting, applied in the field of boron-containing mineralizing agent, to achieve the effects of reducing pollution, high utilization rate, and increasing the proportion of addition

Active Publication Date: 2012-11-14
西安弗尔绿创矿业科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the Chinese invention patent application whose application number is 201110027740.0 (publication number CN102071327A) adopts adding a small amount of boric acid to solve the stability problem of magnesium slag by chemical method; the Chinese invention patent application whose application number is 200910020830. Add additives containing aluminum raw materials to modify magnesium slag, but it is only used as a modifier for magnesium reduction slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] All raw materials for magnesium smelting are calculated by mass percentage, among which calcined dolomite is 82.2%, ferrosilicon is 16.9%, fluorite is 0.5%, boron-containing raw materials are boric acid, and the addition ratio is 0.4%. Calcined dolomite 80.8%, ferrosilicon 16.7% and fluorite 2.5% are calculated by mass percentage in the control group.

[0016] Mix all the raw materials for magnesium smelting and pulverize together. The raw materials are pulverized to 200 meshes, and then pressed into agglomerates with a pressure of 15 tons by a hydraulic press as pellets. Under the insulation for 7.5 hours, the vacuum is 10Pa, the reaction is over, and the metal crude magnesium is collected, and its yield is the same as that of the control group. The magnesium slag was cooled to room temperature, the magnesium slag of the control group was pulverized, and the magnesium slag added with mineralizer was lumpy.

Embodiment 2

[0018] All magnesium refining raw materials are calculated by mass percentage, calcined dolomite 80.08%, ferrosilicon 16.42%, fluorite 0.5%, boron-containing raw material adopts boric acid, and the addition ratio is 3%, and the control group is the same as embodiment 1. The raw materials for magnesium refining and mineralizers are fully mixed and pulverized together, pressed into blocks by a hydraulic press with a pressure of 15 tons, knocked into a size of 15×10×10mm, put into a reduction tank and kept at 1200°C for 7.5 hours, the vacuum degree is 10Pa, the reaction is over, and the metal crude magnesium is collected, and its yield is the same as that of the control group. The magnesium slag was cooled to room temperature, the magnesium slag of the control group was pulverized, and the magnesium slag added with mineralizer was lumpy.

Embodiment 3

[0020] All magnesium refining raw materials are calculated by mass percentage, calcined dolomite is 80.08%, ferrosilicon is 16.42%, fluorite is 0.5%, boron-containing raw material is borax, and the addition ratio is 3%, and the control group is the same as embodiment 1. The magnesium refining raw material and the mineralizer are fully mixed and pulverized together, pressed into blocks by a hydraulic press with a pressure of 15 tons, put into a reducing tank and kept at 1200°C for 7.5 hours, the vacuum degree is 10Pa, after the reaction is completed, the crude magnesium metal is collected, The yield was the same as that of the control group. The magnesium slag was cooled to room temperature, the magnesium slag of the control group was pulverized, and the magnesium slag added with mineralizer was lumpy.

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Abstract

The invention relates to a Pidgeon process for making magnesium and a boronic mineralizer for partially replacing fluorite. The Pidgeon process is characterized by comprising the following steps: metering and burdening calcined dolomite as a raw material, ferrosilicon as a reducing agent and a mineralizer together, wherein the mineralizer consists of 0.5-3.0% of fluorite and 0.3-3.1% of boronic raw material according to proportions in the total weight of pellets, the ferrosilicon accounts for 12-18% of the total weight of the pellets, and the balance of calcined dolomite; then briquetting the materials after smashing, placing the materials into a reduction tank, heating to 1150-1250 DEG C, vacuum pumping inside the reduction tank, cooling after heat preservation, and collecting crude magnesium. Compared with the prior art, the Pidgeon process has the following advantages: although the price of a boronic compound industrial product in the mineralizer is higher than that of the fluorite, the boronic compound industrial product is less in dosage than the fluorite and reduces the pollution to the environment of fluorine. In addition, conventional equipment and process conditions do not need to be changed; and secondly, the modified magnesium slag obtained by the Pidgeon process has better cementitious activity.

Description

technical field [0001] The invention relates to a Pidgeon process for smelting magnesium and a boron-containing mineralizer which partially replaces fluorite. Background technique [0002] Metal magnesium and magnesium alloys are new materials that my country has focused on developing in recent years, and are widely used in aerospace, automobiles and motorcycles, 3C products, medical care and other fields. Ningxia is one of the world's major producers of magnesium and magnesium alloys, and has been listed as a "National Pidgeon Magnesium Demonstration Base" and a "National High-quality Magnesium Alloy Industry Base". Magnesium smelting by Pidgeon method is a mature method, and the amount produced by this process is very large. Usually, 6-8 tons of reduced slag will be produced per ton of magnesium produced by Pidgeon method. Especially air pollutant CO 2 , SO 2 , HF and other gas emissions are serious, which has attracted extensive attention. During the stacking and tran...

Claims

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Application Information

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IPC IPC(8): C22B26/22C22B5/04
Inventor 韩凤兰吴澜尔杨奇星杜春郭生伟陆有军陈宇红
Owner 西安弗尔绿创矿业科技有限责任公司
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