Support material for silicon magnesite and preparation method of support material

A mine-used silicon-magnesium technology, which is applied in the field of silicon-magnesium mine support materials and its preparation, can solve problems such as too fast reaction of active magnesium oxide content, product warping and deformation, and lower product quality, so as to achieve light weight, increase Compressive strength, weight reduction effect

Inactive Publication Date: 2018-06-01
QINGDAO TECHNOLOGICAL UNIVERSITY
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It has been reported that magnesium oxychloride cementitious materials are used to replace wooden packing boxes, manhole covers, ventilation pipes, etc., but magnesium oxychloride cementitious materials have not been used as roadway support materials, and they have the following disadvantages: ①Weak water resistance, ordinary High-quality magnesite products are soaked in water for 28 days, and their strength drops by 70-80%; ②It is easy to absorb moisture and return to brine. In a humid environment or in a rainy season, large water droplets appear on the surface of the product, and even water droplets flow; ③Condensation in summer If the time is too fast, th

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
  • Support material for silicon magnesite and preparation method of support material
  • Support material for silicon magnesite and preparation method of support material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] The first preparation method of the aforementioned support material for magnesia ore includes:

[0042] To prepare the slurry, first add raw materials other than light burnt magnesia, wood chips, fly ash, and glass fiber to the magnesium chloride solution, dissolve and mix evenly, add light burnt magnesia, stir and mix evenly, then add sawdust and pulverized coal Ash mixture, stir and mix to obtain slurry;

[0043] In the slurry molding step, first pour part of the slurry into the mold and flatten it so that the thickness of the slurry is 6-8mm, and then evenly spread the glass fiber on the slurry, and then pour part of the slurry and Flatten, so that the thickness of the slurry poured in again is 6-8mm after being flattened, and then spread the glass fiber evenly on it, and then pour part of the slurry again and flatten it to make the slurry poured in again flat After the thickness is 6-8mm, according to the design of the hollow structure, three sections of plastic pipe ar...

Example Embodiment

[0058] Example 1

[0059] The structure of the support material for magnesia ore prepared in this embodiment is as follows: the outside is a rectangular parallelepiped, and the inner center is provided with a hollow structure along the length direction of the rectangular parallelepiped. The hollow structure is a cylindrical hollow structure. The diameter of the cylindrical hollow structure is 72mm. The inner center of the cuboid is the first end hollow section 1, the first solid section 2, the central hollow section 3, and the second along the length of the cuboid. The solid section 4 and the second end hollow section 5, the first end hollow section 1, the first solid section 2, the central hollow section 3, the second solid section 4 and the second end hollow section 5 are connected in sequence, that is, along In the length direction of the cuboid, from one end to the other end, the center position of the cuboid, that is, the axis position, is in order of hollow section, solid s...

Example Embodiment

[0068] Example 2

[0069] The structure of the supporting material for magnesite ore prepared in this example is the same as that of Example 1. Except that the raw materials are different from that in Example 1, the other preparation process is the same as that of Example 1. The raw materials used in the supporting material for magnesite ore in this example The ratio is:

[0070] 100 parts by weight of light burned magnesium oxide, 80 parts by weight of magnesium chloride solution, 15 parts by weight of fly ash, 17 parts by weight of wood chips, 0.5 parts by weight of sodium polyphosphate, 0.5 parts by weight of triethanolamine, 7 parts by weight of ferrous sulfate, 0.4 parts by weight of phosphoric acid Parts, 0.5 parts by weight of tetrabutylammonium chloride and 8 parts by weight of glass fiber. Among them, the activity index of light-burned magnesia is 62%, and the concentration of the magnesium chloride solution is 28 wt%.

[0071] Three pieces of supporting materials for magn...

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

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Lengthaaaaaaaaaa
Lengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a support material for silicon magnesite and a preparation method of the support material. The support material for the silicon magnesite is prepared from the following raw materials in parts by weight: 100 parts of light calcined magnesia, 80 to 85 parts of magnesium chloride solution, 13 to 25 parts of coal ash, 12 to 18 parts of wood dust, 0.5 to 0.7 part of sodium polyphosphate, 0.5 to 0.7 par of triethanolamine, 5 to 7 parts of ferrous sulfate, and 0.2 to 0.4 part of phosphoric acid. The raw materials of the support material for silicon magnesite comprise an appropriate amount of sodium polyphosphate, triethanolamine, the ferrous sulfate and the phosphoric acid, so that the water stability of the support material for the silicon magnesite is improved; and meanwhile, compared with the support material without the components, the compressive strength and the bending resisting strength of the support material for the silicon magnesite are improved to certain extent.

Description

technical field [0001] The invention belongs to the field of mine building materials, and in particular relates to a silicon-magnesium mine support material and a preparation method thereof. Background technique [0002] In order to improve the production capacity and modernization level of mines, coal mines usually adopt large mining height coal mining technology. Therefore, in order to ensure smooth ventilation in mines, pit logs are used for roadway support. The diameter of pit logs is 300mm and the length is 1500mm. Calculation, if the stack height is calculated as 4.5m, then each stack needs to consume 3.18m 3 Timber, the distance between each stack is 2.5m, so that the wood consumption per kilometer is 1272m 3 , timber at 1200 yuan / m 3 Calculated, the cost of purchasing wood for every 1000m of roadway is 1.53 million yuan. The consumption of such a large amount of wood will also bring a greater economic burden to the mine. In addition, my country's forest coverage ...

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
IPC IPC(8): C04B28/32E21D15/02E21D15/502
CPCC04B28/32C04B2201/50E21D15/005E21D15/02E21D15/502C04B18/26C04B18/08C04B22/16C04B24/122C04B22/149C04B22/165C04B24/121C04B14/42
Inventor 金祖权王雨利王鹏刚
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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