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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 environmental pollution. In our country, we use the "carbon soda" method to produce borax forty For many years, boron mud pollution has not been effectively solved, and has become a long-standing problem in the chemical industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: according to demand and technical condition, by weight percentage, adopt formula data as, waste magnesite fine powder 30%, magnesite ore dressing tailings powder 20%, lightly burned magnesium oxide powder 20%, boron mud powder is 30%, add water of 20% of the total weight of the raw materials, put it into a wet wheel mill to fully stir the wheel mill, and then make a ball blank with a diameter of 40mm-60mm through the process of compaction and ball pressing. After the ball blank is naturally dried, the water content is less than Add 0.5% to the magnesia shaft kiln and calcined at 1550-1650°C to make MgO: ≥65%, SiO 2 : 25%-27%, Fe 2 o 3 : 3%-4%, Al 2 0 3 3 Magnesium-forsterite synthetic sand.

Embodiment 2

[0015] Embodiment 2: According to demand and technical conditions, by weight percentage, adopt formula data as, discarded magnesite fine powder 30%, magnesite ore dressing tailings powder 30%, lightly burned magnesia powder 10%, boron mud powder 30% %, add 20% of the total weight of raw materials into the wet wheel mill and fully stir the wheel mill, and then make a ball blank with a diameter of 40mm-60mm through the process of compaction and ball pressing, and the moisture content of the ball blank is less than 0.5 % and then added to the magnesia shaft kiln and calcined at 1550-1650°C to make MgO: ≥75%, SiO 2 : 15%-17%, Fe 2 o 3 : 3%-4%, Al 2 0 3 3 Magnesium-forsterite synthetic sand.

Embodiment 3

[0016] Embodiment 3: according to demand and technical conditions, by weight percentage, adopt formula data as: discarded magnesite fine powder 50%, magnesite ore dressing tailings powder 20%, boron mud powder is 30%, add raw material gross weight 20% % 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 billet with a diameter of 40mm-60mm, after the ball billet is naturally dried and the water content is less than 0.5%, add it to the magnesia vertical Calcined at 1550-1650°C in the kiln to make MgO: ≥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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