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以淀粉为主要原料、H_2O_2(过氧化氢)为氧化剂、FeSO_4(硫酸亚铁)为催化剂、硼砂为交联剂和硫代硫酸钠为稳定剂,采用正交试验法优选出淀粉胶粘剂的合成条件,进而优选出BCF(生物质炭基复混肥)造粒用胶粘剂的最佳工艺条件。研究结果表明:当m(淀粉)=30 g、氧化温度为45℃和V(H_2O_2)=2.5 m L、氧化阶段10%NaOH(氢氧化钠)溶液4 m L、糊化阶段10%NaOH溶液8 m L和糊化温度为65℃时,制得的胶粘剂之黏性和流动性俱佳;当m(炭粉)∶m(尿素)∶m(磷酸二氢钾)∶m(胶粘剂)≈4∶1∶1∶1时,BCF颗粒的成粒率(为95.60%)和压缩强度(为0.026 MPa)相对最高。
Using starch as raw material, H 2 O 2 (hydrogen peroxide) as oxidant, FeSO 4 (ferrous sulfate) as catalyst, borax as cross-linking agent and sodium thiosulfate as stabilizer, the synthesis conditions of starch adhesive were optimized by orthogonal test , And further preferred BCF (biomass carbon-based fertilizer) granulation adhesive the best process conditions. The results show that when m (starch) = 30 g, oxidation temperature 45 ℃ and V (H 2 O 2) = 2.5 m L, the oxidation stage of 10% NaOH solution 4 mL, When m (carbon powder): m (urea): m (potassium dihydrogen phosphate): m (adhesive) ≈ 8 m L and gelatinization temperature is 65 ℃, the viscosity and fluidity of the prepared adhesive are excellent. 4: 1: 1: 1, the granulation ratio (95.60%) and compressive strength (0.026 MPa) of BCF particles were the highest.