动力煤煤泥高剪切调浆浮选提质研究

刘旭; 韩华; 申世钰; 李志红; 王怀法

doi:10.3969/j.issn.1000-6532.2022.03.028

动力煤煤泥高剪切调浆浮选提质研究

1.
太原理工大学，山西　太原　030024

2.
矿物加工科学与技术国家重点实验室，北京　100160

基金项目: 矿物加工科学与技术国家重点实验室开放基金（BGRIMM-KJSKL-2020-14）；山西省自然科学基金资助项目（201801D121054）

详细信息

作者简介: 刘旭（1995-），男，硕士研究生，主要研究细粒煤浮选、高剪切调浆浮选方向

通讯作者: 王怀法（1963-），男，教授，主要研究浮选理论与工艺；面向智能化的浮选过程与装备设计

中图分类号: TD951

收稿日期: 2020-11-02

刊出日期: 2022-06-25

Upgrading of Steam Coal Slime Using High Intensity Conditioning Flotation

1.
Taiyuan University of Technology, Taiyuan, Shanxi, China

2.
State Key Laboratory of Mineral Processing, Beijing, China

More Information

Corresponding author: Wang Huaifa, wanghuaifa@tyut.edu.cn

Received Date: 02 November 2020

Publish Date: 25 June 2022

摘要

摘要:
高剪切调浆作为煤泥浮选预处理技术，对浮选过程强化具有积极作用。本次研究以内蒙古自治区鄂尔多斯市乌审旗图克镇葫芦素煤矿的煤样进行一系列的调浆浮选实验，研究了高剪切调浆预处理对于该煤样浮选的影响。结果表明：FDJ+Q1药剂组合下，高剪切调浆浮选比常规浮选可燃体回收率提高了3.79个百分点；在可燃体回收率相近的情况下，可节省捕收剂用量37.5%；浮选动力学实验结果表明，经过高剪切调浆预处理，前两个20 s内可燃体回收率分别提升了20.02%和25.99%，90 s时基本完成分选过程，浮选速度常数增大了近50%。EKOF+仲辛醇药剂组合下，高剪切调浆强大的剪切力与涡流效应会使复合药剂中的起泡剂在调浆阶段便发挥作用，气泡携带煤粒上浮，并带走未及时分散的药剂，造成药剂的浪费，恶化浮选效果。
- 煤泥 /
- 浮选 /
- 高剪切调浆 /
- 浮选动力学
Abstract:
As a pretreatment technology of coal slime flotation, High Intensity Conditioning has a positive effect on the strengthening of flotation process. In this study, a series of slurry mixing and flotation tests were carried out on coal samples from Hulusu Coal Mine in Tuke Town, Udeng Banner, Ordos City, Inner Mongolia Autonomous Region to study the effect of high shear slurry mixing pretreatment on coal flotation. The results show that the recovery rate of high shear slurry flotation was 3.79% higher than that of conventional flotation combustible mixture under FDJ and Q1. In the case of similar combustible recovery, the amount of collector can be saved by 37.5%. The test results of flotation kinetics tests show that after high-shear slurry conditioning pretreatment, the combustible recovery rate increased by 20.02% and 25.99% respectively in the first two 20 s. The flotation process was completed at 90 s. The flotation velocity constant increased by nearly 50%. Under the combination of EKOF and Secoctanol, the strong shear force and eddy current effect will make the foaming agent composition in the composite agent play a role in the mixing stage. The bubbles carry coal particles to float, and carry drugs those are not dispersed in time, which causes waste of drugs and worsens the flotation effect.
- Coal slime /
- Flotation /
- High shear conditioning /
- Flotation kinetics

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图 1 FDJ+Q1组合下不同调浆转速时的浮选效果

Figure 1.

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图 2 EKOF+仲辛醇组合下不同调浆转速时的浮选效果

Figure 2.

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图 3 不同药剂组合下调浆时间实验结果

Figure 3.

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图 4 不同药剂（捕收剂）用量下的浮选实验

Figure 4.

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图 5 不同调浆方式时的浮选动力学曲线

Figure 5.

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表 1 煤样工业分析/%

Table 1. Proximate analysis of coal samples

水分	灰分	挥发分	固定碳
1.97	37.14	21.40	39.49

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表 2 煤样粒度组成

Table 2. Size analysis of coal samples

粒级/mm	产率/%	灰分/%	筛上累计		筛下累计
粒级/mm	产率/%	灰分/%	产率/%	灰分/%	产率/%	灰分/%
+0.5	5.87	14.07	5.87	14.07	100.00	36.47
-0.5+0.25	26.83	38.71	32.70	34.28	94.13	37.86
-0.25+0.125	19.88	44.73	52.57	38.23	67.30	37.53
-0.125+0.074	10.76	37.32	63.34	38.08	47.43	34.51
-0.074+0.045	7.31	30.08	70.65	37.25	36.66	33.68
-0.045	29.35	34.58	100	36.47	29.35	34.58
合计	100.00	36.47

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表 3 煤泥分步释放实验结果

Table 3. Timed-release analysis results of coal samples

产品编号	产率/ /%	灰分 /%	精煤累计		尾煤累计
产品编号	产率/ /%	灰分 /%	产率/%	灰分/%	产率/%	灰分/%
1	29.29	2.79	29.29	2.79	100.00	35.70
2	7.20	3.94	36.49	3.01	70.71	49.33
3	6.19	5.49	42.68	3.37	63.51	54.47
4	6.31	4.74	48.99	3.55	57.32	59.76
5	5.43	7.16	54.42	3.91	51.01	66.57
6	5.81	21.46	60.23	5.60	45.58	73.65
7	39.77	81.27	100	35.70	39.77	81.27
合计	100.00	35.70

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