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Pellet prepared through magnesium smelting waste

A magnesium smelting and pelletizing technology is applied in the field of pellets made from magnesium smelting waste residues and the field of preparation thereof, which can solve the problems of difficult recycling of metal smelting wastes and high manufacturing cost of pellets, so as to improve the purity and save raw materials. Cost, excellent results

Inactive Publication Date: 2015-12-23
杭州碧清环保科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems in the prior art that metal smelting waste is difficult to recycle and the pellet manufacturing cost is too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The pellets of Example 1 were manufactured according to the following steps:

[0017] (1) Mix 100 grams of iron-containing dust, 0.5 grams of magnesium reduction slag powder (dicalcium silicate), 0.1 grams of magnesium refining slag (magnesium chloride) and 8 grams of Portland cement.

[0018] (2) Add 10 grams of water to each 100 grams of the mixture, and use a PanPelletizer to make pellets with a particle size of 25 mm.

[0019] (3) The pellets are dried, cured and cured.

[0020] The five pellet samples made according to the above steps were tested for compressive strength. The results are shown in Table 1.

[0021] Table 1 (Unit: Kg / piece)

[0022]

Embodiment 2

[0024] The pellets of Example 2 were manufactured according to the following steps:

[0025] (1) Mix 100 grams of iron ore powder, 1 grams of magnesium reduction slag powder (dicalcium silicate), 0.5 grams of magnesium refining slag (magnesium chloride) and 9 grams of Portland cement.

[0026] (2) Add 15 grams of water to each 100 grams of the mixture, and use a PanPelletizer to make pellets with a particle size of 22 mm.

[0027] (3) The pellets are dried, cured and cured.

[0028] The 5 pellet samples made according to the above steps were tested for compressive strength. The results are shown in Table 2.

[0029] Table 2 (Unit: Kg / piece)

[0030]

Embodiment 3

[0032] The pellets of Example 3 were manufactured according to the following steps:

[0033] (1) Refining 100 grams of iron dust sludge and iron ore powder mixture, the mass ratio of iron dust sludge to iron ore powder is 5:5, 3 grams of magnesium reduction slag powder (dicalcium silicate), 1 gram of magnesium The slag (magnesium chloride) and 10 grams of Portland cement are mixed evenly

[0034] (2) Add 20 grams of water to every 100 grams of the mixture, and make pellets with a particle size of 18 mm using a pan pelletizer.

[0035] (3) The pellets are dried, cured and cured.

[0036] The five pellet samples made according to the above steps were tested for compressive strength. The results are shown in Table 3.

[0037] Table 3 (Unit: Kg / piece)

[0038]

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PUM

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Abstract

The invention relates to a pellet manufactured through reducing slag and refining slag generated in the metal magnesium smelting process and a manufacturing method of the pellet, and belongs to the field of metal smelting waste resource reutilization and pellet manufacturing. According to the pellet, waste containing iron (iron dust mud) or iron ore powder or the mixture of the waste containing iron (iron dust mud) and the iron core powder serves as a raw material, magnesium reducing slag dicalcium silicate C2S(2CaO SiO2) serves as dissolvent, refining slag magnesium chloride (MgCl2) and cement serve as a bonding agent, and the pellet is manufactured. The magnesium smelting waste is utilized for manufacturing the small pellet for sintering, the treatment cost of the waste can be reduced, the pollution of the waste to the environment is reduced, a large amount of expensive dissolvent and a large number of expensive bonding agents can be replaced, and the production cost of the pellet is reduced.

Description

technical field [0001] The invention relates to the fields of resource recycling of metal smelting waste and pellet manufacturing, and more specifically relates to a pellet made by using magnesium smelting waste slag and a preparation method thereof. Background technique [0002] At present, pellets are one of the main raw materials of iron and steel. The production of pellets in my country shows a rapid growth trend. By 2010, China's pellet production capacity has reached 216 million tons. However, due to factors such as raw material costs, fuel and equipment, etc. This restricts the production of pellets in my country. By 2010, the annual output of pellets will be about 140 million tons. [0003] The pelletizing method is to mix fine ore or iron-containing waste with binders, additives, etc. in a certain proportion, and then briquette them into green balls by a pelletizer or a compactor. The pelletizing method is one of the methods to effectively improve the quality of iro...

Claims

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Application Information

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IPC IPC(8): C22B1/24
Inventor 朴大兴夏抒李丙先
Owner 杭州碧清环保科技有限公司
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