A kind of preparation method of silicon calcium potassium magnesium soil conditioner
A soil conditioner, silicon calcium potassium magnesium technology, applied in calcareous fertilizers, fertilizer mixtures, inorganic fertilizers and other directions, can solve the problems of affecting yield and quality, uneven calcination, time-consuming and laborious, etc., to increase storage resistance, improve commodity Value, effect of improving soil performance
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Embodiment 1
[0038] A. Raw material preparation:
[0039] By weight, including potassium shale 60%, limestone 20%, dolomite 20%;
[0040] B. Grinding:
[0041] Grind the raw materials prepared in step A with a ball mill to 200 mesh;
[0042] C. Calcination:
[0043] Grind the raw materials in step B to 200 mesh, place them in a rotary kiln, and calcine them at 1200° C. to obtain clinker. During calcination, control the calcination time to 45 minutes, and the calcination pressure to 1 atmosphere;
[0044] D. Water quenching:
[0045] The clinker obtained after step C is calcined is immediately conveyed through the conveyor belt for water quenching to obtain a solid product. During water quenching, water spraying at 20°C is used, the water pressure is 1.5 atmospheres, and the conveying speed of the conveyor belt is controlled at 60-80cm / s;
[0046] E. Crushing:
[0047] The solid intermediate product obtained in step D is pulverized to 300 mesh by a pulverizer to obtain a powder;
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Embodiment 2
[0053] The difference from Example 1 is that the preparation of raw materials in step A includes 65% of potassium-containing shale, 17.5% of limestone and 17.5% of dolomite by weight ratio. In step C, the calcination temperature is 1160° C., and the calcination time is 50 min.
Embodiment 3
[0055] The difference from Example 1 is that the preparation of raw materials in step A includes, by weight ratio, 70% of potassium-containing shale, 15% of limestone, and 15% of dolomite. In step C, the calcination temperature is 1240° C., and the calcination time is 40 minutes.
[0056] Product analysis and application effect of the present invention are shown in Table 1-Table 4:
[0057] Table 1 Conversion rate of potassium in potassium shale into available potassium
[0058]
[0059] Table 2 Comparison results of the conversion rate of potassium in potassium-bearing shale into available potassium
[0060]
[0061] It can be clearly shown by Table 1 and Table 2 that the conversion rate of potassium in the potassium-containing shale of the technical solution of the present invention into available potassium is high, which can reach more than 98.6%, and the conversion rate of potassium can be significantly improved, which is obviously higher than current technology.
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