深錐固體通量與絮凝劑單耗和料漿濃度的數學關系

王勇; 曹晨; 吳愛祥

doi:10.13374/j.issn2095-9389.2021.01.25.002

深錐固體通量與絮凝劑單耗和料漿濃度的數學關系

doi: 10.13374/j.issn2095-9389.2021.01.25.002

北京科技大學土木與資源工程學院, 北京 100083

基金項目: 國家自然科學基金資助項目（52042402, 51834001）；中央高校基本科研業務費青年教師國際交流成長計劃項目（QNXM20210002）；中央高校基本科研業務費資助項目（FRF-IDRY-20-031，FRF-TP-19-002C2Z）

詳細信息

作者簡介:
吳愛祥,等.超細全尾砂靜態絮凝沉降規律及其在立式砂倉設計中的應用.化工礦物與加工,2019,48(3):35)

通訊作者:
E-mail: wuaixiang@126.com

中圖分類號: TD85
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出版歷程
- 收稿日期: 2021-01-25
- 網絡出版日期: 2021-04-20
- 刊出日期: 2021-10-12

Mathematical relationship between the solid flux of deep cone thickener, flocculant unit consumption, and slurry concentration

School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China

More Information

Corresponding author: E-mail: wuaixiang@126.com

摘要

摘要: 深錐濃密機的面積或占地大小主要由其固體通量決定。通過量筒靜態沉降實驗，計算得到深錐濃密機固體通量，分析了絮凝劑單耗、料漿濃度對深錐濃密機固體通量的影響，得到了兩種因素對深錐濃密機固體通量的影響規律。結果表明，尾礦在5～30 g·t^?1的絮凝劑單耗下，基本呈現二次函數關系；料漿的固相質量分數為6%～26%時，固體通量呈現先增大后減小的趨勢，與實驗所得的規律相契合。通過對絮凝劑單耗和料漿濃度耦合效應下的固體通量方程回歸分析，得到三者之間的數學關系，進而確定二者對固體通量的貢獻為：料漿濃度>絮凝劑單耗。結合絮凝劑及料漿濃度對固體通量的影響分析，總結了絮凝劑單耗和料漿濃度貢獻值不同的原因。最后，結合單因素和耦合條件下的數學方程，對深錐濃密機的設計和運行提出工程建議。在深錐濃密機運行過程中，需要優先保證料漿濃度，其次是絮凝劑單耗。
- 深錐濃密機 /
- 固體通量 /
- 絮凝劑單耗 /
- 料漿濃度 /
- 數學關系
Abstract: Tailings thickening is an important process of paste filling technology. At present, a deep cone thickener is often used for tailings thickening. The sedimentation rate of tailings affects the solid flux of the deep cone thickener and determines the area occupied by the deep cone thickener. At present, the addition of flocculant to tailings has become a common practice to improve the efficiency of tailings thickening. Thus, the influence of various factors on the solid flux of the deep cone thickener needs to be investigated. In this study, the solid flux of the deep cone thickener was calculated through the static sedimentation experiment of the graduated cylinder, and the influence law of the flocculant unit consumption and slurry concentration on the solid flux of the deep cone thickener was analyzed, and the influence of the two factors on the solid flux of the deep cone thickener was determined. Results showed that the tailings exhibit a quadratic function relationship when the flocculant unit consumption is 5–30 g·t^?1. At 6%–26% solid mass fraction of slurry, the solid flux first increases and then decreases, which is consistent with the experiment. The regression analysis of the solid flux equation under the coupling effect of flocculant unit consumption and slurry concentration shows that the contribution of the two factors to solid flux is slurry concentration > flocculant unit consumption. Based on the analysis of the influence of flocculant unit consumption and slurry concentration on solid flux, the reasons for the different contribution values of flocculant unit consumption and slurry concentration were summarized. According to the mathematical relationship between flocculant unit consumption, slurry concentration, and solid flux obtained from the research, engineering suggestions for the design and operation of the deep cone thickener were proposed. During the operation of the deep cone thickener, the slurry concentration should be guaranteed first, followed by the flocculant unit consumption.
- deep cone thickener /
- solid flux /
- flocculant unit consumption /
- slurry concentration /
- mathematical relationship

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圖 1 全尾砂粒級組成曲線

Figure 1. Particle size distribution curve of full tailings

下載: 全尺寸圖片幻燈片

圖 2 自制砂漿攪拌裝置混合、沉降過程

Figure 2. Mixing and settling processes by homemade mortar mixing unit

下載: 全尺寸圖片幻燈片

圖 3 不同絮凝劑單耗與固體通量關系

Figure 3. Relationship between solid fluxes per unit consumption of different flocculants

下載: 全尺寸圖片幻燈片

圖 4 不同料漿濃度與固體通量關系

Figure 4. Relationships between different slurry concentrations and solid fluxes

下載: 全尺寸圖片幻燈片

圖 5 高分子絮凝作用

Figure 5. Polymer flocculation

下載: 全尺寸圖片幻燈片

表 1 全尾砂基本物理性質

Table 1. Basic physical properties of full tailings

True density/ (t·m^?3)	Unit weight/ (t·m^?3)	Porosity/ %	Theoretical saturation/%
2.75	1.64	40.36	80.25

下載: 導出CSV

表 2 不同絮凝劑單耗實驗配料表

Table 2. Experimental ingredient list for different flocculant unit consumptions

Order number	Quality of tailings/g	Quality of water/g	Flocculant unit consumptions/(g·t^?1)	Flocculant addition/g
1	110	890	5	0.183
2	110	890	10	0.367
3	110	890	15	0.550
4	110	890	20	0.733
5	110	890	25	0.917
6	110	890	30	1.100

下載: 導出CSV

表 3 配料表

Table 3. Ingredient list

Order number	Mass fraction of solid phase/%	Quality of tailings/ g	Quality of water/g	Flocculant unit consumptions/ (g·t^?1)	Flocculant addition/g
1	6	60	940	15	0.3
2	11	110	890	15	0.55
3	16	160	840	15	0.8
4	21	210	790	15	1.05
5	26	260	740	15	1.3
6	6	60	940	20	0.4
7	11	110	890	20	0.73
8	16	160	840	20	1.07
9	21	210	790	20	1.4
10	26	260	740	20	1.73

下載: 導出CSV

表 4 不同絮凝劑單耗絮凝沉降實驗結果及固體通量計算結果

Table 4. Results of flocculation and sedimentation experiments with different flocculants and solid flux calculations

Order number	Flocculant unit consumptions/ (g·t^?1)	Initial height/ mm	Time of settlement/s	Height of settlement/ mm	Solid flux/ (t·d^?1·m^?2)
1	5	268	5	235	61.753
2	10	268	5	205	117.89
3	15	268	5	180	164.67
4	20	268	5	160	202.1
5	25	268	5	155	211.46
6	30	268	5	150	220.81

下載: 導出CSV

表 5 不同料漿濃度絮凝沉降實驗結果及固體通量計算結果

Table 5. Results of flocculation and sedimentation experiments with different slurry concentrations and calculation of solid fluxes

Order number	Mass fraction of solid phase/%	Flocculant unit consumptions/ (g·t^?1)	Initial height/ mm	Time of settlement/s	Height of settlement/mm	Solid flux/ (t·d^?1· m^?2)
1	6	15	276	5	190	84.877
2	11	15	268	5	180	164.67
3	16	15	260	5	203	160.64
4	21	15	249	5	209	153.4
5	26	15	243	5	213	147.87
6	6	20	276	5	155	119.42
7	11	20	268	5	150	220.81
8	16	20	260	5	190	197.28
9	21	20	249	5	199	191.75
10	26	20	243	5	206	182.37

下載: 導出CSV

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