Magnesium-coal cinder based novel paving and mining filling material and preparation method thereof

A technology of filling materials and coal cinders, which is applied in cement production, etc., can solve the problems of reducing material porosity, low strength, high energy consumption, etc., and achieve the effect of reducing cost and low cost

Inactive Publication Date: 2021-05-28
西安弗尔绿创矿业科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Chinese patent CN101492260A discloses a magnesium slag Portland cement and its manufacturing method. The main ingredients are cement clinker, gypsum, and magnesium slag. The disadvantage is that the magnesium slag can only be used as an admixture and cannot be completely separated from the cement clinker.
[0008] Chinese patent CN1715232 discloses a method for producing cement clinker by using magnesium smelting waste residue, the main ingredients are gypsum, magnesium slag, limestone, clay, iron ore, anthracite and fluorite, but this patent requires the process of cement firing, which can Consumption is large, and there is a disadvantage that the MgO content in the magnesium waste residue is limited to 6%-10% of the total weight, and other raw materials are not industrial solid waste
[0010] Chinese patent CN103435281A discloses a cement clinker and its preparation process. The main raw materials include limestone, sandstone powder, magnesium slag, fly ash and copper slag. However, this patent also requires a cement firing process, which consumes a lot of energy.
[0012] Chinese patent CN110318802A discloses a magnesium slag cementitious material and its forming process. Its raw materials include water, sodium bicarbonate and magnesium slag. high

Method used

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  • Magnesium-coal cinder based novel paving and mining filling material and preparation method thereof
  • Magnesium-coal cinder based novel paving and mining filling material and preparation method thereof
  • Magnesium-coal cinder based novel paving and mining filling material and preparation method thereof

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Effect test

Embodiment 1

[0145]The percentages by weight of each raw material in the modified magnesium-smelting pellets of the present embodiment are as follows: calcined white (the molar ratio of CaO / MgO is close to 1) 81%, ferrosilicon (about 75% Si content) 16.5%, fluorite (fluorite CaF in stone 2 The content is not less than 95%) 2.25%, boron iron alloy 0.25%; the weight percentage of each element in the boron iron alloy is as follows: B 20%, C 0.5%, Si 1.5%, Al0.5%, S<0.01%, P <0.1%, the balance is Fe; the particle size of boron-iron alloy is not more than 5mm. (You can refer to GB / T 5682-2015 to select FeB20C0.5B ferroboron.)

[0146] The method for producing modified magnesium slag by refining coarse magnesium ingots by using the modified magnesium refining pellets of this embodiment includes the following steps:

[0147] Step D1, according to the weight percentage of each raw material in the modified magnesium refining pellets, send the raw materials into the mill for mixing and fine grindi...

Embodiment 2

[0154] The percentages by weight of each raw material in the modified magnesium-smelting pellets of the present embodiment are as follows: calcined white (the molar ratio of CaO / MgO is close to 1) 81.2%, ferrosilicon (about 75% Si content) 16.6%, fluorite (fluorite CaF in stone 2 The content is not less than 95%) 1.94%, boron iron alloy 0.26%; the weight percentage of each element in the boron iron alloy is as follows: B 18%, C 0.5%, Si 1.5%, Al0.5%, S<0.01%, P <0.1%, the balance is Fe; the particle size of boron-iron alloy is not more than 5mm. (You can refer to GB / T 5682-2015 to select FeB20C0.5B ferroboron.)

[0155] The method for producing modified magnesium slag by refining coarse magnesium ingots by using the modified magnesium refining pellets of this embodiment includes the following steps:

[0156] Step D1, according to the weight percentage of each raw material in the modified magnesium refining pellets, send the raw materials into the mill for mixing and fine gri...

Embodiment 3

[0161] The percentages by weight of each raw material in the modified magnesium-smelting pellets of the present embodiment are as follows: calcined white (the molar ratio of CaO / MgO is close to 1) 82%, ferrosilicon (about 75% Si content) 15%, fluorite (fluorite CaF in stone 2 The content is not less than 95%) 2.71%, boron iron alloy 0.29%; the weight percentage of each element in the boron iron alloy is as follows: B 16%, C 1.0%, Si 2.5%, Al0.5%, S<0.01%, P <0.1%, the balance is Fe; the particle size of boron-iron alloy is not more than 5mm. (You can refer to GB / T 5682-2015 to select FeB16C1.0 ferroboron.)

[0162] The method for producing modified magnesium slag by refining coarse magnesium ingots by using the modified magnesium refining pellets of this embodiment includes the following steps:

[0163] Step D1, according to the weight percentage of each raw material in the modified magnesium refining pellets, send the raw materials into the mill for mixing and fine grinding...

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Abstract

The invention discloses a novel magnesium-coal cinder-based paving and mining filling material and a preparation method thereof. The material comprises the following raw materials in percentage by weight: 15-50% of a magnesium-coal cinder-based cementing material, 50-85% of aggregate and 0-5% of an additive, the magnesium-coal cinder-based cementing material is a cementing material formed by adding one or two of fly ash and coal gasification slag into magnesium slag serving as a basic raw material; the aggregate comprises one or a combination of more of construction waste, coal gangue, aeolian sand, slag and desulfurized gypsum; the additive comprises one or a combination of more of a retarder, a water reducing agent, an early strength agent and a drag reducer. The invention provides a new utilization way for solid waste treatment in the coal chemical industry and the magnesium smelting industry, and realizes solid waste recycling.

Description

technical field [0001] The invention belongs to the technical field of solid waste regeneration and utilization, and in particular relates to a new magnesium-coal slag-based paving and mine filling material and a preparation method thereof. Background technique [0002] Metal magnesium and its alloys, as "green engineering materials in the 21st century", play an important role in my country's economic development. As of 2019, the output of primary magnesium in my country is 969,000 tons, but the production of magnesium metal in my country mainly adopts the Pidgeon method. Every ton of magnesium produced will produce 6-8 tons of magnesium slag waste, and the hot magnesium slag will expand during the cooling process. Pulverization produces a large amount of dust, which seriously pollutes the local environment. The above-mentioned unmodified magnesium slag is used in the existing patents, but there are common problems such as complicated activation process of magnesium slag and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08C04B7/147C04B7/21C04B12/00
CPCC04B28/08C04B7/147C04B7/21C04B12/005C04B2111/00198C04B14/02C04B2103/0068Y02P40/10
Inventor 刘浪
Owner 西安弗尔绿创矿业科技有限责任公司
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