Roller way sintering furnace with uniform hearth temperature

Abstract

The invention discloses a roller way sintering furnace with uniform hearth temperature. The roller way sintering furnace comprises a furnace body and a hearth, wherein a transmission roller way, an upper heating element and a lower heating element are arranged in the hearth, the upper heating element and the lower heating element are arranged above and below the transmission roller way correspondingly, the upper heating element is correspondingly provided with an upper protective sleeve, the lower heating element is correspondingly provided with a lower protective sleeve, and the top of the furnace body is provided with an exhaust port. One end of the upper protective sleeve is provided with at least one first air inlet hole, the other end of the upper protective sleeve is provided with atleast one second air inlet hole, one end of the lower protective sleeve is provided with at least one first air inlet hole, the other end of the lower protective sleeve is provided with at least onesecond air inlet hole, the first air inlet holes are the same in size and orientation, the second air inlets are the same in size and orientation, the orientations of the first air inlet holes are opposite to the orientations of the second air inlet holes, and the orientations are all located in the vertical face of the hearth. Uniformity of the flow field and the temperature inside the hearth canbe improved, and the comprehensive performance of sintered products is ensured.

Description

technical field [0001] The invention relates to industrial sintering equipment, in particular to a roller table sintering furnace with uniform furnace temperature. Background technique [0002] With the rapid development of the new energy industry, the lithium battery industry has become a hot spot today, and the lithium battery material is a key factor determining its performance. The demand for lithium battery materials has increased sharply, and there is an urgent need for efficient large-scale mass production. The lithium battery material roller sintering furnace is a necessary large-scale continuous sintering equipment in the preparation process of lithium battery materials. At present, the roller sintering furnace for lithium battery materials generally adopts a double-layer four-row structure, and the inner width of the furnace is 1530mm. However, with the gradual increase in market demand for lithium battery materials, manufacturers of lithium battery materials urge...

AI Technical Summary

Problems solved by technology

At present, the roller sintering furnace for lithium battery materials generally adopts a double-layer four-row structure, and the inner width of the furnace is 1530mm. However, with the gradual increase in market demand for lithium battery materials, manufacturers of lithium battery materials urgently need to increase the production capacity of sintering equipment. The cross-section of the furnace body of the roller furnace is continuously widening, gradually developing to a double-layer six-row structure, and the inner width of the furnace will increase to 2210mm, but the large furnace cross-section makes it difficult to ensure the uniformity of the flow field and temperature field inside the furnace

Moreover, the preparation process of high-quality lithium battery materials requires that the temperature difference inside the furnace be within ±3°C. The uniform distribution of temperature in the furnace is the prerequisite for the excellent quality of lithium battery materials. It has become the main bottleneck restricting the development of lithium battery material industry

[0003] (1) The intake and exhaust methods of the existing roller sintering furnace for lithium battery materials are that the bottom of the furnace is fed with normal temperature gas, and the top of the furnace body is equipped with an exhaust port. The gas flow in the furnace does not form an "overall circulation", which affects the flow of atmospheric gas in the furnace , it is easy to produce a local "dead zone" in the furnace space, such as figure 1 As shown in areas a, b, c and d, the uneven distribution of the flow field is caused, which affects the uniformity of the internal temperature

[0004] (2) The heating method of the existing roller sintering furnace body is as follows: by arranging two rows of heating element silicon carbide rods on the top and bottom of the sagger, the silicon carbide rods are used to radiate the sintered products to heat, and this causes the temperature in the middle of the furnace to the surrounding area ( figure 2 Medium corresponds to 1373.01) high, the temperature near the heating rod is higher than the ambient temperature, close to the wall ( figure 2 In the area corresponding to 1347.79), the temperature gradient is relatively large, resulting in a decrease in the temperature uniformity inside the furnace

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