Coagulating salt for potassium salt solid mine backfilling and manufacturing method thereof

A manufacturing method and technology of coagulation salt, which are applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve problems such as affecting the production and safety of mining areas, low backfill strength, and coal seam collapse, etc., and achieve good social benefits. and economic benefits, low cost and simple manufacturing process

Inactive Publication Date: 2011-09-07
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
View PDF2 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tailings itself is a soluble salt, which belongs to a bulk structure. The backfilling strength is low and the density is low. Direct backfilling will easily cause the collapse of 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
  • Coagulating salt for potassium salt solid mine backfilling and manufacturing method thereof
  • Coagulating salt for potassium salt solid mine backfilling and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1

[0019] A method for manufacturing potash solid coagulation salt for backfilling mines, such as figure 1 As shown, take 10.00kg of lightly burned powder roasted with magnesite, its main content is active magnesium oxide, and prepare a saturated solution of magnesium chloride (with a specific gravity of 1.33) 12.00kg. Here, the saturated solution of magnesium chloride obtained in the process of potassium salt production is selected, and the tail is taken Mineral sodium chloride salt grains 10.00kg, magnesium chloride salt grains 10.00Kg, in which the particle size of sodium chloride salt grains is 8mm, and the grain size of magnesium chloride salt grains is 4mm. Stir the above solution and materials evenly in a mixer, make the slurry and inject it into a template or standard mold for molding at ambient temperature. After demolding, cure for 12 hours at ambient temperature and air humidity less than 70%. Coagulate salt, test its mechanical properties.

[0020] The...

Example Embodiment

[0029] Example 2

[0030] A method for manufacturing potash solid coagulation salt for mine backfilling. Take 10.00kg of lightly burned powder roasted from magnesite, whose main content is active magnesium oxide, and prepare 8.00kg of saturated magnesium chloride solution (specific gravity 1.35). Potassium salt is used here. For the saturated solution of magnesium chloride obtained during the production process, 150.00 kg of sodium chloride salt particles of tailings and 120.00 kg of magnesium chloride salt particles are taken. Stir the above solution and materials evenly in a mixer, make the slurry, inject it into a template or standard mold, and form at ambient temperature. After demolding, cure for 6 hours at ambient temperature and air humidity less than 70%. Coagulate salt, test its mechanical properties.

[0031] The main technical indicators are as follows:

[0032] Density: 1320kg / m 3 ,

[0033] Compressive strength: 3.25MPa,

[0034] Flexural strength: 0.92MPa,

[0035] Axial...

Example Embodiment

[0039] Example 3

[0040] A method for manufacturing potash solid coagulation salt for mine backfilling. Take 10.00kg of semi-roasted caustic dolomite powder from dolomite ore, whose main content is active magnesium oxide, and prepare 12.00kg of saturated magnesium chloride solution (specific gravity 1.33). Magnesium chloride is used here. The hydrate is prepared from tailings sodium chloride salt particles 10.00kg, magnesium chloride salt particles 10.00Kg. Stir the above solution and materials evenly in a mixer, make the slurry and inject it into a template or standard mold for molding at ambient temperature. After demolding, cure for 12 hours at ambient temperature and air humidity less than 70%. Coagulate salt, test its mechanical properties.

[0041] The main technical indicators are as follows:

[0042] Density: 1960kg / m 3 ,

[0043] Compressive strength: 32MPa,

[0044] Flexural strength: 7.8MPa,

[0045] Axial compressive strength: 25.0MPa,

[0046] Axial tensile strength: 1.91...

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
Densityaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Flexural strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a coagulating salt for potassium salt solid mine backfilling and a manufacturing method thereof. The manufacturing method comprises the following steps: 1. preparing a magnesium chloride saturated solution; 2. evenly mixing 1.00 part by mass of magnesium oxide, 0.80-1.20 parts by mass of magnesium chloride saturated solution, 1.00-15.00 parts by mass of sodium chloride particle in tailings and 1.00-12.00 parts by mass of magnesium chloride particle in tailings to form a slurry; 3. casting the slurry, and curing to form; and 4. curing at ambient temperature under the humidity of lower than 70% for 6-12 hours to obtain the coagulating salt. By manufacturing the coagulating salt with a certain strength from magnesium oxide and a great deal of tailings containing sodium and magnesium salts, the invention has the advantages of simple manufacturing process, low cost and wide sources of magnesium oxide, can maximally backfill the tailings into the mine, meets the requirement of safety in production, and solves the problem of pollution of tailings for the vegetation in the ambient environment as well as the problem of stacking of the tailings, thereby having favorable social benefit and economic benefit.

Description

technical field [0001] The invention relates to the field of chemical building materials, in particular to a potassium salt solid mine backfilling coagulation salt and a manufacturing method thereof. Background technique [0002] my country and surrounding countries and regions are rich in underground salt mine resources. At present, the development and utilization of its resources, especially the utilization of potash ore resources, is in the ascendant. However, with the extraction of potash ore, a large amount of sodium and magnesium salt tailings are accompanied. According to the requirements of clean production and environmental protection, most of the tailings will be backfilled underground, except for a part of comprehensive utilization. The underground backfill requires safety and reliability. The tailings itself is a soluble salt, which belongs to a bulk structure. The backfilling strength is low and the density is small. Direct backfilling will easily cause the colla...

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): C04B28/32C04B18/12
CPCY02W30/91
Inventor 肖学英张志宏王继东程怀德常成功张全有董茹董生发马艳芳
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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