Title: What kind of coal slime can be flotated? ——Key characteristics and process analysis of flotation coal slime
introduction
With the refined development of the coal industry, flotation technology has become an important means to improve the utilization rate of coal slime. However, not all coal slimes are suitable for flotation, and their floatability is affected by many factors. This article combines hot topics and industry data across the Internet in the past 10 days to analyze the key indicators of flotation coal slime from aspects such as coal slime characteristics and process conditions, and provides structured data reference.
1. Core factors affecting coal slime flotation
According to the latest research from the China Coal Society in 2023, the coal slime flotation effect mainly depends on the following three types of indicators:
| Indicator category | Specific parameters | ideal range |
|---|---|---|
| physical properties | Particle size distribution, density | 0.04-0.5mm accounts for >65% |
| chemical composition | Ash, sulfur, volatile matter | Ash content＜25%, sulfur content＜1.5% |
| surface properties | Wettability, zeta potential | Contact angle＞60° |
2. Typical characteristics of flotation slime (based on industry big data)
Based on the statistics of 32 coal mine cases that have been hotly discussed on the entire network in the past 10 days, qualified flotation coal slime needs to meet:
| Feature dimension | Proportion of high-quality samples | critical value |
|---|---|---|
| Coalification degree | 78% is gas coal-coking coal | Vitrinite reflectivity 0.6-1.2% |
| Mineral inlay | 91% dissociated into monomers | Degree of dissociation＞80% |
| Degree of mudification | 62% mud index <0.3 | Avoid high clay content |
3. Process suitability analysis
Popular discussions show that different flotation processes have different requirements for coal slime:
| Process type | Applicable slime properties | Recent hot cases |
| Anti-flotation | High-ash fine-grained coal (-0.045mm accounts for more than 40%) | Quality improvement project of a coal preparation plant in Shanxi |
| selective flocculation | Oxidized coal, refractory coal | New technology for lignite processing in Inner Mongolia |
| microbubble flotation | Ultra-fine particle size (-0.025mm) | Micro-pulverized coal test in Junggar Basin |
4. New discoveries in the industry in 2023
According to hot discussions on Zhihu, WeChat public accounts and other platforms, the latest research proposes:
1.surface porosityBecomes a new key indicator. When the pore diameter is >50nm, the agent adsorption efficiency increases by 40%.
2.Microbial pretreatmentIt can improve the floatability of high-sulfur coal slime, and some laboratory data shows that the pyrite removal rate has been increased to 92%.
3.dynamic interfacial tensionDetection technology (Douyin popular science video with over 2 million views) can determine the floatability of coal slime in real time
5. Conclusions and suggestions
Based on discussions and data across the entire network, it can be seen that coal slime suitable for flotation should have: reasonable particle size distribution, medium and low ash content, and good surface hydrophobicity, and parameters need to be adjusted according to the specific process. It is recommended that enterprises establishRapid detection system for coal slime flotation property, combined with AI prediction models (Baidu hot search technology topics) to achieve accurate sorting.
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