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A method for comprehensive utilization of low-grade magnesite and boronite

A magnesite, low-grade technology, applied in the direction of boron compounds, boron oxide compounds, chemical instruments and methods, etc., can solve the problems of mine vegetation restoration and low comprehensive utilization of resources

Active Publication Date: 2018-12-18
丹东金硼肥业有限公司
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Problems solved by technology

The problem of mine vegetation restoration is serious, and the comprehensive utilization of resources is not high

Method used

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  • A method for comprehensive utilization of low-grade magnesite and boronite
  • A method for comprehensive utilization of low-grade magnesite and boronite
  • A method for comprehensive utilization of low-grade magnesite and boronite

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Effect test

Embodiment approach

[0053] (1) Weigh 100g of low-grade magnesite flotation tailings powder, pour it into a 500ml beaker together with 300ml of deionized water, stir well, pour it into a 500ml three-necked flask, and measure the concentrated sulfuric acid with a graduated cylinder Take 100 ml, dilute to 50% (mass ratio), start stirring at 300 rpm, heat up to 85°C-120°C, and react for 2-5 hours.

[0054] (2) Carbon dioxide is passed into an aqueous solution containing 60 grams of sodium chloride and 30 milliliters of ammonia water, and the absorption reaction generates sodium bicarbonate and ammonium chloride.

[0055] (3) Carbon dioxide and liquid ammonia use industrial urea production technology to produce urea.

[0056] (4) Weigh 1,000 grams of magnesite powder after flotation of low-grade magnesite, mix it with 100 grams of boron mud (magnesium basic carbonate), heat up to 750°C, and calcinate for 2 hours to recover carbon dioxide.

[0057] (5) Part of the carbon dioxide collected by calcinati...

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Abstract

A method for comprehensive utilization of low-grade magnesite and boron-magnesite, relating to a method for utilizing magnesium ore, the method uses tailings powder after flotation of low-grade magnesite and sulfuric acid as raw materials, and chemically reacts to prepare sulfuric acid heptahydrate Magnesium, at the same time, recover and utilize carbon dioxide; use high-grade magnesite obtained by flotation of low-grade magnesite as raw material, and calcinate to obtain light-calcined magnesium oxide powder, and at the same time, recover and utilize carbon dioxide; part of the carbon dioxide recovered by chemical methods React with sodium chloride solution dissolved in ammonia gas at room temperature to form sodium bicarbonate and ammonium chloride, and the ammonium chloride produced reacts with light-burned magnesium oxide powder to form magnesium chloride, and the ammonia gas is evaporated for reuse; Carbon dioxide, sodium bicarbonate and low-grade boron-magnesite ore powder recovered by the method; the present invention realizes the comprehensive utilization of resources and even high-efficiency utilization. Broad prospects.

Description

technical field [0001] The invention relates to a method for utilizing magnesium ore, in particular to a method for comprehensively utilizing low-grade magnesite and boronite. Background technique [0002] In the use of magnesite in China, there is a problem that high-quality magnesite is over-exploited, while low-grade magnesite or fine ore and tailings are not fully utilized. The problem of mine vegetation restoration is serious, and the comprehensive utilization of resources is not high. Not only are there few product varieties, but the product grades are also not high. [0003] Utilizing the characteristics of chemical technology, aiming at the common utilization of low-grade magnesite, not only the protective use of refractory raw materials, but also the transformation of the magnesite industry and the reform of the supply side structure, the chemical utilization of carbon dioxide in magnesite, not only solves the problem It solves the problem of carbon dioxide emissi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/40C01B32/50C01D7/18C01C1/16C01F5/30C01B35/12C04B2/10C07C1/12C07C9/04C07C29/09C07C31/04C07C68/00C07C69/96
CPCC01B35/123C01C1/164C01D7/18C01F5/30C01F5/40C01P2002/72C04B2/102C07C1/12C07C29/09C07C68/00C07C9/04C07C31/04C07C69/96Y02P40/40
Inventor 王国胜刘超辉赵昕昕谢英鹏王祝敏聂鑫
Owner 丹东金硼肥业有限公司
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