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Method of preparing Mg, Sr alloy by vacuum heat reduction

A vacuum heat and alloy technology, applied in the field of non-ferrous metal smelting, can solve the problem of low utilization rate of strontium, and achieve the effects of short manufacturing process, high-efficiency preparation and high material utilization rate

Inactive Publication Date: 2006-09-20
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is: to overcome the deficiency of the low utilization rate of strontium in the existing mixing method and immersion reduction method, and to provide a new method for preparing Mg-Sr alloy by vacuum thermal reduction

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The implementation process is:

[0020] (1) Raw materials are prepared. The raw materials are: calcined dolomite with a MgO content of 40%, SrO with a purity of 99%, ferrosilicon with a Si content of 75%, and fluorite with a purity of 97%. The mass ratio of ingredients is: calcined white: SrO: ferrosilicon: fluorite = 100:56:28:4;

[0021] (2) Pulverize all raw materials until the particle diameter is less than 0.15mm, and mix them uniformly;

[0022] (3) pressing the pulverized and uniformly mixed raw materials into pellets;

[0023] (4) Put the ball into a reaction tank, and reduce it for 1 hour at a temperature of 1200±50°C and a vacuum of 1-20Pa;

[0024] (5) Collect the metal vapor generated by the reduction and condense it into a condensed Mg-Sr master alloy.

[0025] Implementation effect: the Mg-Sr alloy contains 56% of Sr. The utilization rate of strontium is 60%.

Embodiment 2

[0027] The implementation process is:

[0028] (1) Raw material preparation, the raw materials are: calcined magnesite with MgO content of 95%, Sr(OH) with a purity of 99% 2 , CaO with a purity of 98%, ferrosilicon with a Si content of 75%, aluminum powder with a purity of 99%, Al-Si alloy with a 49% content of Al and Si, and fluorite with a purity of 97%. The mass ratio of ingredients is: calcined magnesite: Sr(OH) 2 : CaO: ferrosilicon: aluminum powder: Al-Si alloy: fluorite = 100: 0.08: 145.4: 53.2: 0.005: 0.005: 9.5;

[0029] (2) Pulverize all raw materials until the particle diameter is less than 0.15mm, and mix them uniformly;

[0030] (3) pressing the pulverized and uniformly mixed raw materials into pellets;

[0031] (4) Put the ball into a reaction tank, and reduce it for 10 hours at a temperature of 1050±50°C and a vacuum of 1-20Pa;

[0032] (5) Collect the metal vapor generated by reduction and condense it into condensed Mg-Sr alloy.

[0033] Implementation eff...

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Abstract

This invention discloses a method for manufacturing Mg-Sr alloy by vacuum thermal reduction, which comprises the steps of: (1) grinding and mixing calcined MgO, SrO or its precursor, CaO, ferrosilicon (or other silicon alloy, aluminum, or aluminum alloys) and fluorite, (2) pressing into large balls, (3) placing into a reaction kettle for vacuum thermal reduction, and (4) collecting Mg and Sr vapor and condensing to form solid Mg-Sr alloy. Compare with conventional Mg metallurgy by Si-thermal reduction or Sr metallurgy by Al-thermal reduction, the method in this invention can achieve simultaneous vacuum thermal reduction of MgO and SRO to obtain Mg-Sr alloy. The method has such advantages as low cost and high efficiency.

Description

technical field [0001] The invention relates to a method for preparing Mg-Sr alloy by vacuum thermal reduction, which belongs to the field of nonferrous metal smelting. Background technique [0002] Strontium is an important raw material for industrial production, but its resources are very limited. The protection and efficient utilization of strontium resources are of concern to all mankind. [0003] Strontium (Sr) and its alloys are widely used in deoxidation, desulfurization, dephosphorization, purification of steel, iron, copper and other alloy smelting, as well as grain refinement and alloying of aluminum and magnesium alloys. Compared with metal strontium, when magnesium-strontium (Mg-Sr) alloy is used for metal smelting, the utilization rate of strontium is higher, and the effects of deoxidation, desulfurization, dephosphorization, purification, refinement, alloying, etc. are better, and storage and use are more efficient. It is safe and convenient, and its preparati...

Claims

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Application Information

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IPC IPC(8): C22C1/00C22B5/16C21C7/04
Inventor 谢卫东李玉兰刘方彭晓东
Owner CHONGQING UNIV
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