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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[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...
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[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...
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[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...
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