响应曲面法优化高硅铁尾矿制备硅肥试验

Optimization of Silicon Fertilizer Preparation from High Silicon Iron Tailings Using Response Surface Methodology

牛福生 ¹牛钰芳 ²张晋霞 ¹张红梅 ²郑凯露²

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作者信息

1. 华北理工大学矿业工程学院,河北唐山 063210;矿产资源绿色开发与生态修复协同创新中心,河北唐山 063210
2. 华北理工大学矿业工程学院,河北唐山 063210
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摘要

为解决铁尾矿堆积造成的环境污染问题,以高硅铁尾矿为原料,在氢氧化钠、含钙活化剂SF混合碱液条件下进行水热-碱溶反应制作硅肥.采用 Box-Behnken设计的响应曲面法建立相关模型进行优化试验,探究反应温度(A)、反应时间(B)、m(SF)/m(原矿)(C)、m(NaOH)/m(SF)(D)对硅肥中有效硅含量的影响.结果表明,各因素对有效硅含量的显著作用大小为:B＞D＞A＞C,各因素交互作用的显著性大小为:AD＞CD＞AC＞BC.在温度为169.83℃、反应时间为2.54 h、m(SF)/m(原矿)为0.98、m(NaOH)/m(SF)为0.77的条件下,有效硅含量达到31.01%.该方法加工温度低、反应时间短、制备工艺简单,能够挖掘铁尾矿的潜在利用价值.

Abstract

To solve the environmental pollution problem caused by the accumulation of iron tailings,silicon fertilizer was prepared from high silicon iron tailings by hydrothermal-alkali dissolution reaction under the conditions of alkaline mixture of sodium hydroxide and calcium containing activator SF.The response surface method designed by Box Behnken was used to establish a relevant model for optimization experiments.The effects of reaction temperature(A),reaction time(B),m(SF)/m(raw ore)(C),and m(NaOH)/m(SF)(D)on the effective silicon content in silicon fertilizer were investigated.The results showed that the significant effects of each factor on the effective silicon content were B＞D＞A＞C,and the significance of interaction between each factor was AD＞CD＞AC＞BC.Under the conditions of temperature of 169.83℃,reaction time of 2.54 h,m(SF)/m(raw ore)of 0.98,and m(NaOH)/m(SF)of 0.77,the effective silicon content reached 31.01%.This method has the advantages of low processing temperature,short reaction time,and simple preparation process,and can explore the potential utilization value of iron tailings.

关键词

铁尾矿/水热法/硅肥/水热-碱溶技术/响应曲面法

Key words

iron tailings/hydrothermal method/silicon fertilizer/hydrothermal-alkali dissolution technology/response surface method

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出版年

2024

非金属矿

苏州非金属矿工业设计研究院

非金属矿

CSTPCD

影响因子：0.636

ISSN：1000-8098

参考文献量11

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