A preparation method for a long-acting slow-release chlorine-based nitrogen and potassium-containing compound fertilizer
A compound fertilizer, chlorine-based nitrogen technology, applied in urea compound fertilizer, nitrogen fertilizer, potash fertilizer and other directions, can solve the problem of slow-release and long-acting chlorine-based nitrogen-potassium compound fertilizer preparation methods are rare, the investment cost of high tower granulation equipment is high, The nitrogen fertilizer utilization rate is less than 30%, which can increase farmers' income, be beneficial to ecological balance, and be beneficial to environmental protection.
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Embodiment 1
[0082] A kind of slow-release long-acting chlorine-based nitrogen-potassium compound fertilizer prepared according to the following steps
[0083] ①. Preparation of chlorine-based nitrogen and potassium compound fertilizer granules
[0084] First, after heating and melting 45 parts by weight of urea, 12 parts by weight of ammonium chloride and 35 parts by weight of potassium chloride are added to mix evenly, and 8 parts by weight of granulating agent and appropriate amount of water are added. Utilize traditional granulator to mix and granulate each component of the compound fertilizer, for subsequent use;
[0085] The granulation aid is composed of 60% to 70% bentonite and 40% to 30% bauxite powder;
[0086] The modified zeolite powder is composed of the following raw materials in weight percentage:
[0087] Zinc stearate 1.1%~2.5%
[0088] Zeolite powder 97.5%~98.9%
[0089] ②.. stearic acid one-time coating
[0090] The consumption of stearic acid is 1.2% of the chlorin...
Embodiment 2~ Embodiment 7
[0106] According to the method and steps of Example 1, according to the formula in Table 1, slow-release long-acting chlorine-based nitrogen and potassium compound fertilizers are prepared
[0107] Table 1
[0108] raw material
Example 2
Example 3
Example 4
Example 5
Example 6
Example 7
urea
50
40
48
51
30
60
10
20
13
17
10
11
potassium chloride
30
33
30
22
53
20
Granulation aid
10
7
9
10
7
9
stearic acid
0.6
0.8
1.0
1.2
0.9
1.1
[0109] The resulting product particles have a round appearance and no peculiar smell;
[0110] The product quality has reached the following technical indicators:
[0111]
[0112]
[0113] The slow-release and long-acting chlorine-based nitrogen-potassium compound fertilizers prepared in Examples 1 to 7 are all suitable for fiber cro...
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