Coagulation salt block for sylvite 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

Active Publication Date: 2011-09-07
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tailings itself is a soluble salt, which belongs to a loose structure, and the backfilling strength is low and the density is low. Direct backfilling will easily cause the subsidence of the mine layer and affect the production and safety of the mining area.

Method used

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  • Coagulation salt block for sylvite solid mine backfilling and manufacturing method thereof
  • Coagulation salt block for sylvite solid mine backfilling and manufacturing method thereof
  • Coagulation salt block for sylvite solid mine backfilling and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, the manufacturing method of the coagulated salt block for backfilling of this potassium salt solid mine includes, taking 10.00 kg of lightly burned powder (mainly containing active magnesium oxide) roasted by magnesite, saturated magnesium chloride solution (prepared by magnesium chloride hydrate Become saturated solution, specific gravity is 1.33) 12.00kg, sodium chloride salt grain 50.00kg, and its salt grain diameter is 8mm, then solution and material are stirred in the mixer, make the first slurry, refer to simultaneously figure 2 , image 3 , injecting the slurry into a hollow mold with a specification of 600×300×300mm to make the outer layer 1 of the concrete salt block, pouring and pressing to obtain a hollow outer layer 1 with a wall 2 thickness of 30 mm; then take 10.00 kg of magnesium chloride salt grains, The salt particle size is 8mm, and 1.25kg of saturated magnesium chloride solution is mixed to form a second slurry, and the se...

Embodiment 2

[0035] The manufacturing method of coagulated salt block for this potassium salt solid mine backfill of the present embodiment is to get 10.00 kg of lightly burned powder (main content is active magnesium oxide) of magnesite roasting, saturated solution of magnesium chloride (using magnesium chloride hydrate to prepare saturated solution) , the specific gravity is 1.35) 8.00kg, sodium chloride salt grains 150.00kg, the salt grain diameter is 5mm, then the solution and materials are stirred evenly in the mixer, and the injection specifications after making the first slurry are 600×300× In the 300mm hollow mould, the thickness of the wall 2 is 30mm for compression molding, take 120.00kg of magnesium chloride salt grains, the salt grain size is 5mm, mix 8.00kg of magnesium chloride saturated liquid into the second slurry and inject it into the hollow, and use the second slurry after compaction. A slurry cover is compacted and formed. After demoulding, it is cured for 24 hours unde...

Embodiment 3

[0043] A kind of manufacturing method of coagulation salt block for backfilling of potassium salt solid mine, get caustic dolomite powder (main component is active magnesium oxide) 10.00kg, magnesium chloride saturated solution (adopting magnesium chloride hydrate to prepare saturated solution, specific gravity It is 1.33) 12.00kg, sodium chloride salt grain 50.00kg, and its salt grain diameter is 5mm, then solution and material are stirred in the mixer, make the first slurry, get magnesium chloride salt grain 10.00kg, its salt grain The particle size is 5mm, and 1.25kg of magnesium chloride saturated liquid is mixed into the second slurry and then injected into a mold of 520×220×220 for compression molding. After taking it out, put it into a mold with a specification of 600×300×300mm and wrap it with the first slurry. The wall thickness of the outer layer made of a slurry is 40mm, pressed and formed, and cured for 12 hours under the condition of ambient temperature and air hum...

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Abstract

The invention relates to a sylvite solid mine backfilling technology, in particular to a manufacturing method of a coagulation salt for sylvite solid mine backfilling. The manufacturing method of the coagulation salt for the sylvite solid mine backfilling comprises the following steps of: mixing and uniformly stirring magnesium oxide, a magnesium chloride saturated solution and sodium chloride salt particles contained in tailings according to the mass ratio of 1.00:(0.80-1.20):(5.00-15.00) to form a first slurry; also mixing and uniformly stirring the magnesium chloride saturated solution and the sodium chloride salt particles according to the mass ratio of 1.00:(8.00-15.00) to form a second slurry; finally pouring the first slurry and the second slurry, carrying out press forming, and then solidifying for 12-24 hours; and conserving under the condition that environmental temperature and humidity is less than 70 percent to prepare a coagulation salt block, wherein the coagulation salt block structurally comprises an outer layer (1) and an inner core (3). The invention has simple manufacturing process, low cost and good social benefit and economic benefit, solves the problems of pollution and stack caused by the tailings on the vegetation of a surrounding environment and realizes the requirements for clean production and environmental protection.

Description

technical field [0001] The invention relates to the backfill technology of potassium salt solid mine, in particular to a method for manufacturing coagulation salt for backfilling of potassium salt solid mine. Background technique [0002] There are abundant underground salt mine resources in my country and surrounding countries and regions. At present, the development and utilization of its resources, especially the potash mine resources, are in the ascendant. However, with the extraction of potash mines and the treatment of a large amount of sodium and magnesium salt tailings, 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 soluble salt, which is a bulk structure, and the backfilling strength is low and the density is low. Direct backfilling will easily cause the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/32C04B18/12
CPCY02W30/91
Inventor 肖学英张志宏程怀德王继东张全有常成功董茹董生发马艳芳
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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