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Magnesium slag modifier and magnesium slag modification method

A technology of modifier and magnesium slag, applied in the field of pollution control, to achieve the effect of increasing the amount of addition

Inactive Publication Date: 2011-05-25
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For every 1 ton of resources directly input into magnesium smelting, 3.2 tons of environmental waste will be produced

Method used

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  • Magnesium slag modifier and magnesium slag modification method

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Experimental program
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Effect test

Embodiment 1

[0014] Embodiment 1: Magnesium slag is crossed 60 mesh sieves, add boric acid, mix evenly by boric acid: magnesium slag=1: 200-340 (weight ratio), then make with press sample machine, the sample of 40 * 40 * 9mm, adopt horse Furnace roasting, controlled temperature 1150°C, roasting at the above temperature for 3 hours, air cooling, and discharging. The γ-orthosilicate in the existing magnesium slag can be converted into β-orthosilicate.

Embodiment 2

[0015] Embodiment 2: as figure 1 Among them, the upper left is magnesium slag without adding boric acid, and the remaining three samples are made by adding boric acid according to boric acid:magnesium slag=1:333 (weight ratio), and then using a press machine to make a sample of 40×40×9mm. The temperature of the muffle furnace was controlled at 1200°C, and the sample was roasted for 6 hours. It can be seen from the figure that the dicalcium orthosilicate in the magnesium slag sample without boric acid is mainly γ-dicalcium orthosilicate (from the cooled sample Whether it is pulverized to judge). However, the sample added with boric acid did not pulverize after cooling.

[0016] Embodiment 2: Magnesium slag is crossed 60 mesh sieves, add boric acid, mix evenly by boric acid: magnesium slag=1: 200-340 (weight ratio), then make with press machine, the sample of 40 * 40 * 9mm, adopt horse Furnace roasting, control temperature 1300°C, roast at the above temperature for 6 hours, ai...

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PUM

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Abstract

The invention discloses a magnesium slag modifier and a magnesium slag modification method. The method comprises the following steps of: uniformly mixing magnesium slag and boric acid according to a weight ratio of 1:(200-340) to prepare a sample; and calcining at the temperature of between 1,150 and 1,300 DEG C for 3 to 6 hours. Beta-dicalcium silicate is prevented from being converted into gamma-dicalcium silicate in Pidgion process magnesium-smelting magnesium slag through a chemical method, and the magnesium slag can be prevented from being pulverized by adding a small amount of boric acid and calcining at high temperature; moreover, the cycle range of the magnesium slag can be widened, and the additional value of utilizing the magnesium slag is improved.

Description

technical field [0001] The invention relates to the technical field of pollution control, in particular to a magnesium slag modifying agent and a magnesium slag modifying method. Background technique [0002] my country is a big producer of magnesium metal. In recent years, the national magnesium output has accounted for more than 70% of the world's total output. The output of Ningxia's magnesium smelting industry accounts for 30% of the country's total magnesium output. The magnesium smelting enterprises in our district use the Pidgeon method to smelt magnesium like most magnesium factories in my country. The Pidgeon process is simple, and the resources required for magnesium production are widely distributed, and the production enterprises can make full use of the abundant coal resources in Ningxia. Magnesium smelting production provides relatively more jobs and significant social benefits. The "Eleventh Five-Year" Science and Technology Development Plan of Ningxia Hui ...

Claims

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Application Information

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IPC IPC(8): C22B26/22
Inventor 吴澜尔韩凤兰杨奇星陈宇红陆有军杜春
Owner BEIFANG UNIV OF NATITIES
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