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Method for synthesizing high-purity forsterite with magnesite tailings and talc tailings

A high-purity forsterite and magnesite technology, applied in the directions of magnesium silicate, silicate, etc., can solve the problems of low use temperature, affecting the use range, etc., and achieve the effects of low production cost, improved service life, and wide use field.

Inactive Publication Date: 2011-12-28
UNIV OF SCI & TECH LIAONING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above literature uses synthetic olivine. Although it has many advantages compared with natural forsterite raw materials, the prepared materials are all light materials, and the use temperature is low, which affects the scope of use.

Method used

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  • Method for synthesizing high-purity forsterite with magnesite tailings and talc tailings
  • Method for synthesizing high-purity forsterite with magnesite tailings and talc tailings
  • Method for synthesizing high-purity forsterite with magnesite tailings and talc tailings

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The molding method of the high-purity forsterite produced in this embodiment is compacting. The production formula includes raw materials and binders, wherein the weight percentage of each component is as follows:

[0030]

[0031] The content of MgO in the fine powder of magnesite tailings mentioned therein is ≥40%, SiO 2 Content 3~5%, Fe 2 o 3 Content ≤ 1.5%, LOI ≤ 50%, particle size < 0.088mm, preferably 64% added;

[0032] Wherein the talc tailings powder MgO content is ≥30%, SiO 2 Content ≥ 50%, Fe 2 o 3 Content ≤ 1.5%, LOI ≤ 12%, particle size < 0.088mm, preferably 33% added;

[0033] The silica fume described therein is a by-product of the production of ferrosilicon, SiO 2 Content ≥ 90%, the preferred amount is 3%;

[0034] Wherein said binding agent is pulp waste liquor, specific gravity is 1.12g / cm 3 The liquid, the addition amount is 8%;

[0035] According to the formula, mix in a forced sand mixer for 20 minutes, use a hydraulic press to form und...

Embodiment 2

[0038] The molding method of the high-purity forsterite produced in this embodiment is compacting. The production formula includes raw materials and binders, wherein the weight percentage of each component is as follows:

[0039]

[0040]The content of MgO in the fine powder of magnesite tailings mentioned therein is ≥40%, SiO 2 Content 3~5%, Fe 2 o 3 Content ≤ 1.5%, LOI ≤ 50%, particle size < 0.088mm, preferably 63% added;

[0041] The talc tailings fine powder MgO content ≥ 30%, SiO 2 Content ≥ 50%, Fe 2 o 3 Content ≤ 1.5%, LOI ≤ 12%, particle size < 0.088mm, the preferred addition amount is 30%;

[0042] The zircon sand powder ZrO described therein 2 Content ≥ 65%, SiO 2 Content ≥ 30%, particle size < 0.088mm, the preferred addition amount is 5%;

[0043] The silica fume described therein is a by-product of the production of ferrosilicon, SiO 2 Content ≥ 90%, preferably adding 2%;

[0044] Wherein said binding agent is pulp waste liquor, specific gravity is 1....

Embodiment 3

[0048] The molding method of the high-purity forsterite produced in this embodiment is ball pressing. The production formula includes raw materials and binders, wherein the weight percentage of each component is as follows:

[0049]

[0050] The content of MgO in the fine powder of magnesite tailings mentioned therein is ≥40%, SiO 2 Content 3~5%, Fe 2 o 3 Content ≤ 1.5%, LOI ≤ 50%, particle size < 0.088mm, preferably 64% added;

[0051] Wherein the talc tailings powder MgO content is ≥30%, SiO 2 Content ≥ 50%, Fe 2 o 3 Content ≤ 1.5%, LOI ≤ 12%, particle size < 0.088mm, preferably 33% added;

[0052] The silica fume described therein is a by-product of the production of ferrosilicon, SiO 2 Content ≥ 90%, the preferred amount is 3%;

[0053] The binder described therein is a mixture of pulp waste liquid and magnesium chloride solution, with a specific gravity of 1.30g / cm 3 The liquid, the addition amount is 7%;

[0054] According to the formula, mix in a forced san...

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Abstract

The invention discloses a method for synthesizing high-purity forsterite by using magnesite tailings and talc tailings, which effectively utilizes tailings resources and can be used to produce high-density refractory materials used under high-temperature conditions above 1600°C. The present invention uses magnesite tailings and talc tailings as the main raw materials, adds additives and binders, and manufactures high-purity forsterite refractory raw materials through batching, mixing, molding, drying, high-temperature synthesis and crushing. The weight percent content of each component is as follows: 60-70% of fine magnesite tailings powder; 25-35% of talc tailings powder; 2-8% of additives; 5-10% of external binder. Using magnesite tailings and talc tailings to synthesize high-purity forsterite refractory raw materials, the use temperature is high (above 1600 ℃), the bulk density is high (greater than 2.55g / cm3), and the combined content of olivine and periclase is greater than 97%. The utility model has wide application field, comprehensive utilization of waste, and low production cost.

Description

technical field [0001] The invention relates to a method for synthesizing magnesium-silicon refractory raw materials, in particular to a method for synthesizing high-purity forsterite with magnesite tailings and talc tailings. Background technique [0002] Pure forsterite is an island structure silicate mineral with the chemical formula Mg 2 SiO 4 , belongs to the orthorhombic crystal system, has the characteristics of high melting point, low thermal conductivity, no hydration, stable chemical properties, corrosion resistance of metal melt and slag, and good compatibility with most refractory materials. However, no natural pure forsterite has been found so far. [0003] Most of the forsterite refractory materials currently produced are made of natural iron forsterite, which is a weakly alkaline refractory material. The main chemical composition is magnesium oxide, silicon oxide and iron oxide, and forsterite (2MgO SiO 2 ) as the main crystal phase and contains a certain a...

Claims

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Application Information

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IPC IPC(8): C01B33/22
Inventor 李志坚吴锋李心慰徐娜
Owner UNIV OF SCI & TECH LIAONING
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