脉冲微波助磨工艺参数对钛铁矿升温性能的影响研究

doi:10.11872/j.issn.1005-2518.2020.04.170

Abstract

Abstract:

Because of its light weight，high strength，and good corrosion resistance，the development and application of titanium have attracted widespread attention from Chinese and foreign scholars.The higher the content，the lower the grade of titanium concentrate that can be recovered，and it is difficult to improve the recovery rate.In order to improve the recovery efficiency of ilmenite，the heating behavior of ilmenite under pulsed microwave conditions was studied.In this study，pulsed microwave pretreatment of ilmenite was carried out using a self-made pulsed microwave device.The effects of different irradiation time，pulse microwave power，weight of ore sample and particle size of different ore samples on the heating performance of ilmenite were studied.The composition of the ore sample was analyzed by X-ray diffractometer，and the particle size of the sample was detected by a nano-laser particle size analyzer.The research results show that the heating behavior of materials in the microwave field is determined not only by the nature of the mineral itself，but also by the power of the microwave heating equipment.The temperature increase rate of ilmenite is significantly affected by the quality of the sample.At the same time，the change law shows consistency under different heating time conditions：When the mass of ilmenite is 40~60 g，the temperature increase rate reaches the maximum.The changes in the quality of ilmenite can significantly affect the heating temperature of the ore sample.Under the condition of a certain microwave power，the longer the microwave acts on the material，the higher the temperature of the ore sample.With the change of the particle size of the material，the microwave temperature showes a trend of increasing first and then decreasing.When the ore sample has a particle size of 25 mm，a weight of 40 g，an irradiation time of 30 s，and an average microwave power of 3 kW，the sample is heated to the best effect.The research in this paper is of great significance for the application of pulsed microwave in the field of grinding aid.

Key words: pulsed microwave, ilmenite, heating performance, process parameters, irradiation time, grinding aid technology

CLC Number:

TD951

Ming HOU, Jun LI, Li YANG, Peiqiang FAN, Shenghui GUO, Yan YAN. Study of Effect of Pulsed Microwave Assisted Grinding Process Parameters on the Ilmenite Heating Performance[J].Gold Science and Technology, 2020, 28(4): 595-602.

Figures/Tables 7

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矿物成分	质量分数	矿物成分	质量分数
TiO₂	52.86	MgO	2.01
Fe	35.12	SiO₂	1.86
CaO	3.22	其他	4.93

粒度/mm	温度/℃	粒度/mm	温度/℃
2	243	35	280
10	265	45	238
25	300

温度/℃	试验条件				温度/℃	试验条件
温度/℃	辐照时间/s	脉冲微波功率/W	矿样质量/g	矿样粒度/mm	温度/℃	辐照时间/s	脉冲微波功率/W	矿样质量/g	矿样粒度/mm
150	10	1 000	50	25	175	30	1 000	50	25
240	20	1 000	50	25	250	30	1 500	50	25
300	30	1 000	50	25	270	30	2 000	50	25
330	40	1 000	50	25	305	30	2 500	50	25
350	50	1 000	50	25	330	30	3 000	50	25
370	60	1 000	50	25	155	10	1 000	40	25
386	70	1 000	50	25	242	20	1 000	40	25
398	80	1 000	50	25	320	30	1 000	40	25
409	90	1 000	50	25	360	40	1 000	40	25
420	100	1 000	50	25	380	50	1 000	40	25
429	110	1 000	50	25	400	60	1 000	40	25
440	120	1 000	50	25	150	10	1 000	50	25
90	10	1 000	20	25	240	20	1 000	50	25
168	10	1 000	40	25	300	30	1 000	50	25
170	10	1 000	60	25	326	40	1 000	50	25
132	10	1 000	80	25	352	50	1 000	50	25
95	10	1 000	100	25	370	60	1 000	50	25
182	20	1 000	20	25	140	10	1 000	60	25
256	20	1 000	40	25	234	20	1 000	60	25
248	20	1 000	60	25	308	30	1 000	60	25
185	20	1 000	80	25	326	40	1 000	60	25
145	20	1 000	100	25	352	50	1 000	60	25
250	30	1 000	20	25	360	60	1 000	60	25
320	30	1 000	40	25	243	30	1 000	50	2
295	30	1 000	60	25	265	30	1 000	50	10
210	30	1 000	80	25	300	30	1 000	50	25
176	30	1 000	100	25	280	30	1 000	50	35
25	30	0	50	25	238	30	1 000	50	45
110	30	500	50	25

Study of Effect of Pulsed Microwave Assisted Grinding Process Parameters on the Ilmenite Heating Performance

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References 23

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