What coal is used in lime kiln

What coal is used in lime kilns? Comprehensive analysis of coal selection and thermal data

Lime kiln is a key equipment in lime production, and its fuel selection directly affects production efficiency and environmental protection indicators. Recently, discussions surrounding the use of coal in lime kilns have become increasingly popular in the industrial sector. This article will combine the hot topics on the Internet in the past 10 days to provide you with a structured analysis of coal selection for lime kilns from the perspectives of coal type characteristics, calorific value requirements, environmental protection standards, etc.

1. Core requirements for coal in lime kilns

Lime kilns usually require coal with high calorific value, low sulfur and low ash content to ensure stable calcination temperature and controllable pollution. The following is comparative data of mainstream coal types:

2. Recent hot topics: The impact of environmental protection policies on the selection of coal types

According to industry media reports within 10 days, many places have introduced new regulations to limit lime kiln emissions, requiring sulfur content ≤1% and ash content ≤20%. This makesanthraciteBecoming the first choice, its price has recently increased by about 5%. Some companies try to mix blue charcoal (semi-coke). The data comparison is as follows:

3. Operational suggestions: How to optimize coal use?

1.Coal blending technology: Mixing anthracite and blue charcoal at a ratio of 7:3 can reduce costs by 10% and meet emission standards.
2.Granularity control: Coal particle size should be maintained at 20-50mm to improve combustion efficiency.
3.Equipment adaptation: Coal with volatile content less than 10% is recommended for shaft kilns, and can be relaxed to 15% for rotary kilns.

4. Future Trend: Clean Energy Substitution

According to industry forum discussions, biomass fuels (such as palm shells) and natural gas have been tried in small lime kilns, but the stability of calorific value is still a bottleneck. It is expected that coal will still account for more than 80% of lime kiln fuel in the next three years.

Summary: The coal used in lime kilns needs to integrate the three elements of calorific value, environmental protection and cost. Anthracite is currently the best balanced choice, but companies need to continue to pay attention to policy and technological innovation.