System for calcining lithium salt on lime rotary kiln production line

Abstract

The lithium salt calcining system for the lime rotary kiln production line comprises a lithium salt batching and conveying system, a vertical preheater, a rotary kiln, a grate cooler and a clinker conveying unit, the output end of the lithium salt batching and conveying system is connected with a top feeding port of the vertical preheater, and the bottom of the vertical preheater is fixedly installed at a kiln tail smoke chamber. The kiln tail smoke chamber is fixedly installed at one end of the rotary kiln, the vertical cooler is fixedly installed at the other end of the rotary kiln, a discharging port of the vertical cooler is connected with a feeding port in the top of the grate cooler through a flow guide plate, and a discharging port of the grate cooler is connected with a feeding port of the clinker conveying unit. The system is suitable for preheating of powdery raw materials and cooling of clinker with wide particle size distribution, the overall heat exchange efficiency is high, the energy consumption is low, and the lithium salt production capacity is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to calcine lithium salt technical field, concretely is a lime rotary kiln production line calcine lithium salt's system. BACKGROUND

[0002] Lithium is widely distributed in nature, and exists in rocks, soil, salt brine and seawater. As an important new energy material, lithium and its compounds have important significance for the development of energy industries such as lithium batteries and nuclear power. At present, the extraction of lithium is mainly divided into brine lithium extraction and ore lithium extraction. Ore lithium extraction is an important source of lithium and lithium salt in China, and spodumene is one of them. The main production processes of spodumene lithium extraction are lime sintering method and sulfuric acid method. In the sulfuric acid method production process, natural alpha-type spodumene is calcined in a rotary kiln to 1150-1200 DEG C to convert it into beta-type spodumene.

[0003] However, the existing lime rotary kiln production line calcine lithium salt system has a large volume requirement for lithium ore, but some small volume lithium ore, such as powder, is collected, thereby causing a certain waste. Moreover, the existing lime rotary kiln production line calcine lithium salt system has low heat exchange efficiency and high calcination heat consumption, and thus needs to be improved. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a lime rotary kiln production line calcine lithium salt system to solve the problems in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A lime rotary kiln production line calcine lithium salt system, comprising a lithium salt batching and conveying system, a vertical preheater, a rotary kiln, a grate cooler, and a clinker conveying unit. The output end of the lithium salt batching and conveying system is connected to the top feed inlet of the vertical preheater. The bottom of the vertical preheater is fixedly installed at the kiln tail smoke chamber. The kiln tail smoke chamber is fixedly installed at one end of the rotary kiln. The other end of the rotary kiln is fixedly installed with a vertical cooler. The discharge outlet of the vertical cooler is connected to the top feed inlet of the grate cooler through a flow guide plate. The discharge outlet of the grate cooler is connected to the feed inlet of the clinker conveying unit.

[0007] Preferably, the surface of the vertical preheater is connected to a powder ash bin through a pipeline. The top of the powder ash bin is connected to a preheater decomposition furnace through a pipeline. The bottom of the preheater decomposition furnace is connected to a decomposition furnace through a pipeline.

[0008] Preferably, the bottom of the powder ash bin is connected to the decomposition furnace through a pipeline.

[0009] Preferably, the vertical cooler is connected to a fan through a pipeline.

[0010] Preferably, the preheater decomposition furnace interior comprises five stages of preheater cyclones.

[0011] Compared with the prior art, the present application has the beneficial effects that:

[0012] The system for calcining lithium salt of the lime rotary kiln production line has the advantages of preheating of powdery raw materials and cooling of granular distribution wide clinker, high overall heat exchange efficiency, low energy consumption, and large lithium salt production capacity. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a whole structure schematic view of the present application.

[0014] In the figure: 1, rotary kiln; 2, kiln tail smoke chamber; 3, vertical preheater; 4, decomposition furnace; 5, preheater decomposition furnace; 6, grate cooler; 7, vertical cooler; 8, fly ash bin. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0016] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "vertical", "upper", "lower", "horizontal" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0017] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0018] Please refer to Figure 1 The present application provides a technical solution:

[0019] The application discloses a system for calcining lithium salt by using a lime rotary kiln production line, and belongs to the technical field of lithium salt production.

[0020] Further, the surface of the vertical preheater 3 is connected with the ash bin 8 through a pipeline, the top of the ash bin 8 is connected with the preheater decomposing furnace 5 through a pipeline, and the bottom of the preheater decomposing furnace 5 is connected with the decomposing furnace 4 through a pipeline.

[0021] Further, the bottom of the ash bin 8 is connected with the decomposing furnace 4 through a pipeline.

[0022] Further, the vertical cooler 7 is connected with a fan through a pipeline.

[0023] Further, the preheater decomposing furnace 5 internally comprises five-stage preheater cyclones, and specifically, the connection mode among the five-stage preheater cyclones will not be described in detail here.

[0024] Working principle: when lithium ore is transported into the vertical preheater 3 through the lithium ore batching and conveying system, the powdery substance can be completely decomposed due to small particle size and heat, and the granular lithium ore is partially decomposed when passing through the vertical preheater;

[0025] At this time, the fan at the vertical cooler 7 is opened, the fan draws air from the outside, so that the air enters the rotary kiln 1 from the vertical cooler 7 after being heated by passing through the rotary kiln 1, the kiln tail smoke chamber 2 and the vertical preheater 3, the hot air in the decomposing furnace 4 blows the substance in the ash bin 8 into the preheater decomposing furnace 5, the preheater decomposing furnace 5 decomposes the substance, the decomposed substance enters the decomposing furnace 4, then the decomposing furnace 4 is connected with the calcining chamber of the rotary kiln 1, the substance is discharged from the decomposing furnace 4 into the rotary kiln 1, and part of the substance directly enters the rotary kiln 1, the substance continues to be decomposed in the rotary kiln 1, is cooled by the kiln head vertical cooler 7 and is discharged into the grate cooler 6, and is then conveyed to the warehouse by the clinker conveying unit.

[0026] The system has high utilization rate of fuel, the heat in the decomposing furnace 4 and the preheater decomposing furnace 5 is derived from the rotary kiln 1, the overall heat exchange efficiency is high, the energy consumption is low, the lithium salt production capacity is large.

[0027] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the present application, which should be limited only by the appended claims and their equivalents.

Claims

1. A system for calcination of lithium salts in a lime rotary kiln production line, comprising a lithium salts dosing and conveying system, a vertical preheater (3), a rotary kiln (1), a grate cooler (6), a clinker conveying unit, characterized in that: The output end of the lithium salt batching and conveying system is connected with the top feeding port of the vertical preheater (3), the bottom of the vertical preheater (3) is fixedly installed at the kiln tail smoke chamber (2), the kiln tail smoke chamber (2) is fixedly installed at one end of the rotary kiln (1), the other end of the rotary kiln (1) is fixedly installed with the vertical cooler (7), the discharge port of the vertical cooler (7) is connected with the top feeding port of the grate cooler (6) through a guide plate, and the discharge port of the grate cooler (6) is connected with the feeding port of the clinker conveying unit.

2. The system for calcining lithium salts in a lime rotary kiln production line according to claim 1, characterized in that: The surface of the vertical preheater (3) is connected with the dust bin (8) through a pipeline, the top of the dust bin (8) is connected with the preheater decomposing furnace (5) through a pipeline, and the bottom of the preheater decomposing furnace (5) is connected with the decomposing furnace (4) through a pipeline.

3. The system for calcining lithium salts in a lime rotary kiln production line according to claim 2, characterized in that: The bottom of the dust bin (8) is connected with the decomposing furnace (4) through a pipeline.

4. The system for calcining lithium salts in a lime rotary kiln production line according to claim 1, characterized in that: The vertical cooler (7) is connected with a fan through a pipeline.

5. The system for calcining lithium salts according to claim 2, characterized in that: The preheater decomposing furnace (5) internally comprises five-stage preheater cyclones.

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