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
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Embodiment 1
[0019] A kind of coagulation salt manufacture method for potash solid mine backfill, such as figure 1 As shown, get 10.00kg of lightly burned powder roasted by magnesite, whose main content is active magnesium oxide, prepare 12.00kg of magnesium chloride saturated solution (specific gravity is 1.33), select the magnesium chloride saturated solution obtained in the potassium salt production process for use here, and take the tail 10.00kg of ore sodium chloride salt grains, 10.00Kg of magnesium chloride salt grains, wherein the grain diameter of sodium chloride salt grains is 8mm, and the grain diameter of magnesium chloride salt grains is 4mm. Stir the above solutions and materials evenly in a mixer, make a slurry, pour it into a template or a standard mold, and mold it at ambient temperature. After demolding, it is maintained at ambient temperature and air humidity less than 70% for 12 hours to become Coagulate salt and measure its mechanical properties.
[0020] Its main tec...
Embodiment 2
[0030] A method for producing coagulation salt for backfilling of potassium salt solid mines. Get 10.00kg of lightly burned powder roasted by magnesite, whose main content is active magnesium oxide, and prepare 8.00kg of magnesium chloride saturated solution (specific gravity is 1.35). Here, potassium salt is used For the magnesium chloride saturated solution obtained in the production process, 150.00 kg of tailings sodium chloride salt grains and 120.00 kg of magnesium chloride salt grains are taken. Stir the above solutions and materials evenly in the mixer, inject the slurry into the formwork or standard mold and form it at ambient temperature. Coagulate salt and measure its mechanical properties.
[0031] Its main technical indicators are as follows:
[0032] Density: 1320kg / m 3 ,
[0033] Compressive strength: 3.25MPa,
[0034] Flexural strength: 0.92MPa,
[0035] Axial compressive strength: 2.08MPa,
[0036] Axial tensile strength: 0.26MPa,
[0037] Static compres...
Embodiment 3
[0040] A method for producing coagulation salt for backfilling of potassium salt solid mines. Get 10.00kg of caustic dolomite powder half-roasted in dolomite ore, its main content is active magnesium oxide, and prepare 12.00kg of magnesium chloride saturated solution (specific gravity is 1.33). Here, magnesium chloride The hydrate is prepared by taking 10.00kg of tailings sodium chloride salt grains and 10.00Kg of magnesium chloride salt grains. Stir the above solutions and materials evenly in a mixer, make a slurry, pour it into a template or a standard mold, and mold it at ambient temperature. After demolding, it is maintained at ambient temperature and air humidity less than 70% for 12 hours to become Coagulate salt and measure its mechanical properties.
[0041] Its 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] Ax...
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