A preparing method of a selenium rich slow-release particle matrix fertilizer
A slow-release, selenium-enriched technology, applied in the direction of alkaline orthophosphate fertilizer, inorganic fertilizer, fertilizer mixture, etc., to achieve the effect of long fertilizer effect, lower production cost, and simple operation process
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Embodiment 1
[0041] Step 1: Preparation of foamed porous matrix
[0042] 1) Clean the glass surface of the waste cathode ray tube after removing the electron gun, remove the fluorescent coating and the grid, then crush the screen glass, ball mill it and pass it through a 300-600 mesh standard sieve for standby;
[0043] 2) Clean and dry the discarded TFT-LCD substrate glass, crush and ball mill it and pass it through a 150-200-mesh standard sieve for later use;
[0044] 3) Put 63% of the above screen glass powder, 28% of TFT-LCD substrate glass powder, 8% of tripotassium phosphate, 0.7% of carbon powder, and 0.3% of potassium permanganate into the mixer according to the mass fraction , after mixing until the uniformity is greater than 98%, a batch is formed;
[0045] 4) Put the above-mentioned batch materials into a heat-resistant stainless steel mold, move the mold together with the batch materials into a foaming kiln; start from room temperature, raise the temperature to 710 °C at a hea...
Embodiment 2
[0057] Step 1: Preparation of foamed porous matrix
[0058] 1) Clean the glass surface of the waste cathode ray tube after removing the electron gun, remove the fluorescent coating and the grid, then crush the screen glass, ball mill it and pass it through a 300-600 mesh standard sieve for standby;
[0059] 2) Clean and dry the discarded TFT-LCD substrate glass, crush and ball mill it and pass it through a 150-200-mesh standard sieve for later use;
[0060] 3) Put 75% of the above screen glass powder, 17% of TFT-LCD substrate glass powder, 7% of tripotassium phosphate, 0.6% of carbon powder, and 0.4% of potassium permanganate into the mixer according to the mass fraction , after mixing until the uniformity is greater than 98%, a batch is formed;
[0061] 4) Put the above-mentioned batch materials into a heat-resistant stainless steel mold, move the mold together with the batch materials into a foaming kiln; start from room temperature, raise the temperature to 680 °C at a hea...
Embodiment 3
[0073] Step 1: Preparation of foamed porous matrix
[0074] 1) Clean the glass surface of the waste cathode ray tube after removing the electron gun, remove the fluorescent coating and the grid, then crush the screen glass, ball mill it and pass it through a 300-600 mesh standard sieve for standby;
[0075] 2) Clean and dry the discarded TFT-LCD substrate glass, crush and ball mill it and pass it through a 150-200-mesh standard sieve for later use;
[0076] 3) Put 69% of the above screen glass powder, 25% of TFT-LCD substrate glass powder, 5% of tripotassium phosphate, 0.2% of carbon powder, and 0.8% of potassium permanganate into the mixer according to the mass fraction , after mixing until the uniformity is greater than 98%, a batch is formed;
[0077] 4) Put the above-mentioned batch materials into a heat-resistant stainless steel mold, and move the mold together with the batch materials into a foaming kiln; start from room temperature, raise the temperature to 730 °C at a...
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