What are the advantages of lime kiln compared to other lime kilns
As a traditional and mature lime production equipment, the lime shaft kiln exhibits unique advantages in investment cost, applicable scenarios, energy consumption and maintenance compared to other types of kilns such as rotary kilns and rotary kilns. It is particularly suitable for small and medium-sized enterprises and regional production needs. The specific advantages are as follows:
1、 Lower investment cost and lower threshold for entrepreneurship
Compared to rotary kilns (which require millions of equipment and infrastructure investment) and rotary kilns (which have more precision components and higher procurement costs), lime vertical kilns have a simpler structure, with the core consisting of the kiln body, distributor, and ash discharge device, and no complex auxiliary systems. Taking a production line with an annual output of 30000 to 50000 tons as an example, the complete set of equipment and infrastructure investment for lime shaft kilns can usually be controlled at 800000 to 1.5 million yuan, which is only one-third to one-fifth of that of rotary kilns with the same production capacity; And the construction period is short (2-4 months can be put into operation), which can quickly shorten the "investment return" cycle and significantly reduce the entry threshold for start-up or small and medium-sized enterprises with limited funds.
2、 Widely applicable scenarios and strong adaptability to raw materials
Other kilns, such as sleeve kilns, have strict requirements for the particle size and purity of limestone raw materials (requiring uniform particle size and low impurities), while lime shaft kilns can handle irregular limestone of 20-80mm and have a higher tolerance for impurities in raw materials, especially suitable for small and medium-sized mining areas to obtain materials nearby, reducing the cost of raw material screening and transportation. At the same time, its production capacity can be flexibly adjusted (ranging from 50 tons to 300 tons per day), which can meet the bulk demand of industrial fields such as building materials and metallurgy, as well as adapt to small-scale scenarios such as rural soil improvement and small-scale infrastructure, without having to bear fixed high production capacity costs for a single use.
3、 Lower energy consumption and easier operation and maintenance
The lime vertical kiln adopts a "vertical calcination" structure, where the hot gas flow is in reverse contact with the raw materials, and the heat utilization rate can reach over 70%. Compared with rotary kilns (with a thermal efficiency of about 50% -60%), it is more energy-efficient, and the consumption of lime fuel (coal, natural gas) per ton can be reduced by 15% -20%; And the operation and maintenance difficulty is low, without the need for a professional technical team to operate. Ordinary workers can take up their posts after short-term training, and the labor cost is only half of that of an automated rotary kiln; The equipment has fewer vulnerable parts, low maintenance frequency, and subsequent operation and maintenance costs are much lower than those of sleeve kilns or rotary kilns that require regular replacement of precision components.
4、 Small footprint, more flexible site selection
Rotary kilns and rotary kilns require long production lines (including preheating, cooling, conveying and other long-distance equipment), with a single line occupying an area of several thousand square meters. Lime shaft kilns are vertical structures, with a single kiln occupying an area of only 50-100 square meters. They have low requirements for factory space and can be located in areas with limited space such as mining areas and small industrial parks, reducing land leasing costs and raw material transportation distances, further reducing overall operating costs.
