Magnesium-forsterite synthetic sand and preparation method thereof

A technology for forsterite and magnesite, which is applied in the field of magnesium-forsterite synthetic sand and its preparation, can solve problems such as serious environmental pollution and boron mud pollution, and achieve the effect of reducing production costs

Active Publication Date: 2012-08-15
LIAONING ZHONGMEI HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the other hand, boron mud is used as the waste residue from the production of borax or boric acid, and about 4 tons of boron mud are produced for every ton of borax produced. Boron mud has strong alkalinity and serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1: According to requirements and technical conditions, according to weight percentage, the formula data used are 30% of waste magnesite fine powder, 20% of magnesite beneficiation tailings, 20% of light burnt magnesia powder, and boron mud 30%, adding 20% ​​of the total weight of the raw materials, put water into the wet wheel mill to fully stir the wheel, and then through the process of compaction and ball pressing to make a ball with a diameter of 40mm-60mm. When the ball is naturally dried, the moisture is less than After 0.5%, it is added to the magnesia shaft kiln and calcined at 1550-1650℃ to produce MgO: ≥65%, SiO 2 :25%-27%, Fe 2 O 3 :3%-4%, Al 2 0 3 3 Synthetic magnesia-forsterite sand.

Example Embodiment

[0015] Example 2: According to requirements and technical conditions, according to weight percentage, the formula data used are 30% waste magnesite fine powder, 30% magnesite beneficiation tailings powder, light burnt magnesia powder 10%, and boron mud powder 30% %, add 20% of the total weight of the raw materials into the wet-type wheel mill to fully stir the wheel mill, and then through the process of compaction and ball pressing to make a ball with a diameter of 40mm-60mm. When the ball is naturally dried, the moisture content is less than 0.5 %, then added to the magnesia shaft kiln and calcined at 1550-1650℃ to make MgO: ≥75%, SiO 2 :15%-17%, Fe 2 O 3 :3%-4%, Al 2 0 3 3 Magnesia-forsterite synthetic sand.

Example Embodiment

[0016] Example 3: According to requirements and technical conditions, according to weight percentage, the formula data used are: 50% waste magnesite fine powder, 20% magnesite beneficiation tailings powder, 30% boron mud powder, and total weight of 20 % Water is put into the wet-type wheel mill to fully stir the wheel, and then through the process of compaction and ball pressing, the ball is made into a ball with a diameter of 40mm-60mm. When the ball is naturally dried, the moisture content is less than 0.5% and then added to the magnesia After calcination in the kiln at 1550-1650℃, MgO is made: ≥70%, SiO 2 :22%-24%, Fe 2 O 3 :3%-4%, Al 2 0 3 3 Magnesium-forsterite synthetic sand.

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Abstract

The invention relates to a magnesium-forsterite synthetic sand and a preparation method thereof. The magnesium-forsterite synthetic sand is prepared from the following raw materials in percentage by weight: 30-50% of waste magnesite fine powder, 20-30% of magnesite concentrate tailing powder, 0-20% of active light-burned magnesia powder and 30-50% of boric sludge. The preparation method comprisesthe following steps: sufficiently mixing and rolling waste magnesite fine powder, magnesite concentrate tailing powder, boric sludge, light-burned magnesia and water which accounts for 20 wt% of the raw materials in a wet pan; compacting, and balling to obtain ball billets with the diameters of 40-60mm; and naturally drying until the water content is less than 0.5%, adding into a magnesia shaft kiln, and calcining at 1550-1650 DEG C to obtain the magnesium-forsterite synthetic sand. The invention solves the problem of poor high temperature property of the independently used forsterite, and comprehensively utilizes the waste magnesite fine powder, magnesite concentrate tailing powder and boric sludge, thereby changing wastes into valuable substances and lowering the production cost of the magnesium-forsterite synthetic sand.

Description

Technical field [0001] The invention involves a magnesium-magnesium-magnesium olive synthetic sand and its preparation methods for refractory materials, especially the formula of using abandoned diamond magnesium ore, diamond magnesium ore ore, boru mud to produce magnesium olive synthetic sand synthetic sand and sand synthetic sandmethod. Background technique [0002] In recent years, high -grade diamond magnesium ore ore that can be used directly in China has gradually decreased. Due to economic reasons and lack of suitable mineral selection technologies, the powder and low -grade diamond magnesium ore produced by many mines during the mining process directly abandoned, resulting in the direct abandonment, resultingA large waste of ore resources.It is understood that the magnesium ore containing MGO 44%to 46%accounts for about 70%of the total reserves, so processing low -grade ore into high -quality concentrates has high social and economic significance. [0003] As a fire -res...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/622
Inventor 崔学正崔申
Owner LIAONING ZHONGMEI HLDG
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