Preparation of sintered magnesia by one-step calcination from Xinjiang Jianshan magnesite

doi:10.3969/j.issn.1001-1935.2022.02.014

Refractories ›› 2022, Vol. 56 ›› Issue (2): 158-161.DOI: 10.3969/j.issn.1001-1935.2022.02.014

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Preparation of sintered magnesia by one-step calcination from Xinjiang Jianshan magnesite

Lu Zhiyan¹⁾(), Han Lu²⁾, Wu Feng²⁾, Cui Juan¹⁾, Kang Dongdong¹⁾, Feng Yu²⁾, Luo Xudong²⁾()

1)PRCO-KISC (Yunnan) Refractories Co.,Ltd.,Kunming 650000,Yunnan,China

Received:2021-05-16 Online:2022-04-15 Published:2022-04-21
Contact: Luo Xudong

新疆尖山菱镁矿一步煅烧制备烧结镁砂

鲁志燕¹⁾(), 韩露²⁾, 吴锋²⁾, 崔娟¹⁾, 康冬冬¹⁾, 冯雨²⁾, 罗旭东²⁾()

1)云南濮耐昆钢高温材料有限公司云南昆明 650000
2)辽宁科技大学材料与冶金学院辽宁鞍山 114051

通讯作者: 罗旭东
作者简介:鲁志燕:女,1975年生,高级工程师。E-mail: pnkglzx@163.com
基金资助:
国家自然科学基金资助项目(U1908227)

Abstract

Abstract:

To study the properties of sintered magnesia prepared from Xinjiang Jianshan magnesite,the sintered magnesia was prepared using the raw ore block,the raw ore powder and the concentrate after crushing and flotation purification respectively as raw materials and firing at 1 750 ℃ for 6 h by one-step calcination process.The physical properties and chemical composition of the sintered magnesia were tested,and its phase composition and microstructure were analyzed.The results show that:(1)the sintered magnesia directly calcined with raw ore block has 88.66% MgO,2.88% CaO and 5.13% SiO₂,and the sintered magnesia prepared from raw ore powder has 89.15% MgO,2.32% CaO,and 4.22% SiO₂,by mass,respectively,neither of which meets the requirements of grade MS88 sintered magnesia in GB/T 2273—2007;(2)the sintered magnesia prepared from concentrate has 94.18% MgO,1.43% CaO,1.21% SiO₂ and the bulk density of 3.25 g·cm^-3,which meets the requirements of grade MS94 sintered magnesia in GB/T 2273—2007.

Key words: Xinjiang Jianshan, magnesite, sintered magnesia, one-step calcination, bulk density

摘要：

为了研究新疆尖山菱镁矿制备的烧结镁砂的性能,分别以其块状原矿,经破粉碎的粉状原矿以及经破粉碎、浮选提纯后的精矿为原料,采用一步煅烧工艺,在1 750 ℃保温6 h煅烧制备烧结镁砂,检测烧结镁砂的理化性能,并分析其物相组成和显微结构。结果表明:1)块状原矿直接煅烧制成的烧结镁砂的MgO、CaO、SiO₂含量(w)分别为88.66%、2.88%、5.13%,粉状原矿压块后煅烧制成的烧结镁砂的MgO、CaO、SiO₂含量(w)分别为89.15%、2.32%、4.22%,二者均不符合《GB/T 2273—2007烧结镁砂》中MS88牌号烧结镁砂的要求;2)精矿压块后煅烧制成的烧结镁砂的MgO、CaO、SiO₂含量(w)分别为94.18%、1.43%、1.21%,体积密度为 3.25 g·cm^-3,符合《GB/T 2273—2007烧结镁砂》中MS94牌号烧结镁砂的要求。

关键词: 新疆尖山, 菱镁矿, 烧结镁砂, 一步煅烧, 体积密度

CLC Number:

TQ175

Lu Zhiyan, Han Lu, Wu Feng, Cui Juan, Kang Dongdong, Feng Yu, Luo Xudong. Preparation of sintered magnesia by one-step calcination from Xinjiang Jianshan magnesite[J]. Refractories, 2022, 56(2): 158-161.

鲁志燕, 韩露, 吴锋, 崔娟, 康冬冬, 冯雨, 罗旭东. 新疆尖山菱镁矿一步煅烧制备烧结镁砂[J]. 耐火材料, 2022, 56(2): 158-161.

Figures/Tables 7

References 14

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菱镁矿种类	w/%
菱镁矿种类	MgO	CaO	SiO₂	Al₂O₃	Fe₂O₃	LOI
块状原矿	45.89	0.81	2.83	0.53	0.41	48.53
粉状原矿	45.65	0.78	2.24	0.48	0.51	49.21
精矿粉	46.88	0.97	0.55	0.45	0.43	50

菱镁矿种类	w/%
菱镁矿种类	MgO	CaO	SiO₂	Al₂O₃	Fe₂O₃	LOI
块状原矿	45.89	0.81	2.83	0.53	0.41	48.53
粉状原矿	45.65	0.78	2.24	0.48	0.51	49.21
精矿粉	46.88	0.97	0.55	0.45	0.43	50

Preparation of sintered magnesia by one-step calcination from Xinjiang Jianshan magnesite

新疆尖山菱镁矿一步煅烧制备烧结镁砂

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Figures/Tables 7

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试样编号	w/%			体积密度/ (g·cm^-3)	显气孔率/%
试样编号	MgO	CaO	SiO₂	体积密度/ (g·cm^-3)	显气孔率/%
K	88.66	2.88	5.13	2.88	18.2
KM	89.15	2.32	4.22	3.14	9.1
KF	94.18	1.43	1.21	3.25	5.7

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