Optimized magnesium slag-based cementing material and preparation method thereof

A technology of magnesium slag-based glue and magnesium slag, applied in cement production, etc., can solve the problems of high energy consumption, low strength, and reduced material porosity, and achieve low cost, solve the effect of setting time, and reduce costs

Inactive Publication Date: 2021-05-25
西安弗尔绿创矿业科技有限责任公司
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optimized magnesium slag-based cementing material and preparation method thereof
  • Optimized magnesium slag-based cementing material and preparation method thereof
  • Optimized magnesium slag-based cementing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] 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.)

[0136] 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:

[0137] 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 grind...

Embodiment 2

[0144] 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.)

[0145] 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:

[0146] 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

[0151] 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.)

[0152] 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:

[0153] 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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an optimized magnesium slag-based cementing material and a preparation method thereof. The optimized magnesium slag-based cementing material comprises optimized magnesium slag, and the optimized magnesium slag is magnesium slag obtained after modified magnesium slag is subjected to natural aging or hot casting treatment; the modified magnesium slag is magnesium slag obtained after activity maintaining and stability maintaining treatment is conducted on magnesium slag generated by Pidgeon magnesium smelting; the preparation method of the optimized magnesium slag-based cementing material comprises the following steps: obtaining modified magnesium slag in a magnesium smelting plant, and placing the modified magnesium slag in a slag field for natural aging or hot casting treatment to obtain an optimized magnesium slag raw material; and carrying out coarse crushing and fine crushing pretreatment on the optimized magnesium slag raw material to obtain an optimized magnesium slag material. The optimized magnesium slag-based cementing material provided by the invention can completely replace high-cost cement, greatly reduces the cost of the cementing material, provides a new utilization approach for solid waste treatment in two large pillar industries of coal chemical industry and magnesium smelting, and solves the problems of long setting time and low consolidation strength in the middle and early periods of the magnesium slag cementing material.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling, and in particular relates to an optimized magnesium slag-based gelling 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 high transportation cost. Altho...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/147C04B7/26C04B7/38
CPCC04B7/147C04B7/26C04B7/38Y02P40/10
Inventor 刘浪
Owner 西安弗尔绿创矿业科技有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap