Rotary distributed quartz sand high-temperature chlorination furnace

Abstract

The invention relates to a rotary distributed quartz sand high-temperature chlorination furnace which comprises a chlorination furnace body, a gas conveying pipe, a rotating device, a heating body, a furnace shell and a bracket, the upper end of the chlorination furnace body is externally connected with a temperature measuring galvanic couple, a gas pressure sensor and a feed port, the lower end of the chlorination furnace body is externally connected with an exhaust port and a discharge port, the inner wall of the chlorination furnace body is provided with a baffle, and the periphery of the chlorination furnace body is provided with a heating body, a furnace shell and a bracket; the gas conveying pipe enters the chlorination furnace body from the lower end of the chlorination furnace body and is close to the upper end; two gas outlets are formed in the top end of the gas conveying pipe. The chlorination furnace body is installed in the furnace shell in an inclined mode and can be driven by the rotating device to rotate slowly so as to drive quartz sand to slide from top to bottom in the furnace, and continuous high-temperature chlorination treatment on the quartz sand is achieved; the baffles on the inner wall of the furnace body can effectively disperse the quartz sand, increase the contact area and reaction time of the quartz sand and the chlorinating agent, fully remove the content of alkali metal impurities and improve the purity of the quartz sand. And the structure is sealed, so that the requirement of the quartz sand chlorination reaction on the pressure in a specific range can be met.

Description

Technical Field

[0001] The invention belongs to the technical field of quartz sand processing, and in particular relates to a high-temperature chlorination treatment device for purifying quartz sand. Background Art

[0003] Chlorination roasting is a commonly used purification method in modern mineral processing. Specifically, it refers to adding a chlorinating agent in a certain atmosphere so that the impurities in the mineral are removed by converting them into a gas phase or a condensed phase and leaving the original mineral system. In recent years, chlorination roasting technology has been used for quartz sand purification. Studies have shown that chlorination roasting has a significant purification effect on metal impurities such as Na, K, and Li.

[0004] This patent analyzes existing high-temperature chlorination treatment devices for quartz sand, such as a high-purity quartz sand chlorination device (patent number ZL202321273570.9) and a high-purity quartz sand chlorination device (patent number ZL202120804584.3), and proposes a new type of rotating dispersed high-temperature chlorination treatment device for quartz sand, which is used for high-temperature chlorination purification treatment of quartz sand. Summary of the invention

[0005] The problem to be solved by the present invention is to provide a high-temperature chlorination treatment device for purifying quartz sand, which is used for removing and purifying alkali metal impurities in quartz sand.

[0006] The technical solution adopted by the present invention is: A rotary dispersed quartz sand high-temperature chlorination furnace comprises a chlorination furnace body 11, a gas delivery pipe 7, a rotating device 4, a heating element 10, a furnace shell 12 and a bracket 13; the rotating device 4 is installed at both upper and lower ends of the chlorination furnace body 11, and the rotating device 4 comprises a rotating driving wheel 4-1 and a fixed clamp ring 4-2; the upper end of the chlorination furnace body 11 is externally connected to a temperature measuring thermocouple 1, a gas pressure sensor 2 and a feed port 3, the lower end is externally connected to an exhaust port 6 and a discharge port 8, and a baffle 9 is arranged on the inner wall; the heating element 10, the furnace shell 12 and the bracket 13 are installed on the outer periphery of the chlorination furnace body; the gas delivery pipe 7 enters the interior of the chlorination furnace body 11 from the lower end of the chlorination furnace body 11, and near the upper end of the chlorination furnace body 11, the top end of the gas delivery pipe 7 is provided with two gas outlets 5.

[0007] The chlorination furnace body 11 is a large-caliber thick-walled quartz glass tube, and an array of quartz glass baffles 9 are welded to its inner wall. The baffles are 1 / 3-1 / 2 of the radius of the quartz glass tube, and are staggered left and right and installed in the same position up and down.

[0008] The chlorination furnace body 11 is a large-diameter thick-walled quartz glass tube, which can be made by thermal processing, is easy to replace, and does not introduce new impurities.

[0009] The chlorination furnace body 11 can be rotated slowly under the drive of the rotating device 4, so that the quartz sand can slide from the upper end to the lower end of the chlorination furnace body 11. The baffle 9 can disperse and delay the flow of the quartz sand during the sliding process of the quartz sand from top to bottom, thereby increasing the contact area and reaction time between the quartz sand and the chlorinating agent.

[0010] In the present invention, the sliding direction of the quartz sand in the chlorination furnace body 11 is consistent with the flow direction of the chlorinating agent, which can effectively increase the contact area between the quartz sand and the chlorinating agent and the time of high-temperature chlorination treatment.

[0011] Through the above technical scheme, the present invention first heats the internal temperature of the chlorination furnace body 11 to a specified temperature and keeps it warm, then the rechlorinating agent is introduced into the chlorination furnace body 11 from the gas delivery pipe 7 and the gas outlet 5, and then the quartz sand is added into the chlorination furnace body 11 through the feed port 3; the chlorination furnace body 11 is slowly rotated by the rotating device 4, and the quartz sand slides downward from the upper end of the chlorination furnace body 11, and is blocked and delayed by the baffle 9 layer by layer, so that the quartz sand is dispersed inside the chlorination furnace body 11, and the contact area and reaction time with the chlorinating agent are expanded, so that the quartz sand is fully reacted to remove impurities, thereby achieving the purpose of improving the purity of the quartz sand. After the reaction is completed, the waste gas is first extracted and collected from the exhaust port 6 for environmental protection treatment, and then the treated high-purity quartz sand is collected from the discharge port 8.

[0012] Compared with the existing devices, the rotary dispersed quartz sand high temperature chlorination furnace provided by the present invention has at least the following beneficial effects: 1. The furnace body is rotated at high temperature by the rotating device 4, and the quartz sand is dispersed without accumulation by the baffle 9. The combination of the two makes the device of the present invention have the function of rotating dispersion, increases the contact area between the quartz sand and the chlorinating agent, prolongs the reaction time, and ensures the effect of quartz sand chlorination purification; 2. The structural sealing of the device of the present invention can meet the pressure requirement within a specific range for the chlorination reaction of quartz sand at high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 , 2 It is a schematic diagram of the structure of the present invention.

[0014] In the figure: 1 is a temperature measuring couple, 2 is a gas pressure sensor, 3 is a feed port, 4 is a rotating device, 4-1 is a rotating driving wheel, 4-2 is a fixing clamp ring, 5 is an air outlet, 6 is an exhaust port, 7 is a gas delivery pipe, 8 is a discharge port, 9 is a baffle, 10 is a heating element, 11 is a chlorination furnace body, 12 is a furnace shell, and 13 is a bracket. DETAILED DESCRIPTION

[0015] like Figure 1 As shown: A rotary dispersed quartz sand high temperature chlorination furnace comprises a chlorination furnace body 11, a gas delivery pipe 7, a rotating device 4, a heating element 10, a furnace shell 12 and a bracket 13; the rotating device 4 is installed at both the upper and lower ends of the chlorination furnace body 11, the upper end of the chlorination furnace body 11 is externally connected to a temperature measuring thermocouple 1, a gas pressure sensor 2 and a feed port 3, the lower end is externally connected to an exhaust port 6 and a discharge port 8, a baffle plate 9 is arranged on the inner wall, and a heating element 10, a furnace shell 12 and a bracket 13 are arranged on the outer periphery of the furnace body; the gas delivery pipe 7 enters the interior of the chlorination furnace body 11 from the lower end of the chlorination furnace body 11, and near the upper end of the chlorination furnace body 11, two gas outlet holes 5 are arranged at the top of the gas delivery pipe 7.

[0016] The chlorination furnace body 11 is a large-caliber thick-walled quartz glass tube with a diameter of 300 mm and a wall thickness of 5 mm. The inner wall thereof is processed with 5 groups of inclined quartz glass baffles 9. The length of the baffles 9 is 1 / 3 of the radius of the quartz glass tube, and the baffles 9 are staggered left and right and installed in the same position up and down. The chlorination furnace body 11 is installed in a manner of being inclined from the lower left to the upper right at 15 degrees. Six groups of heating elements 10 are installed on the outer periphery of the chlorination furnace body 11.

[0017] The high-temperature chlorination treatment process of quartz sand of the present invention is as follows: firstly, the interior of a chlorination furnace body 11 is heated to 1050° C. and kept warm for 1 hour, chlorine is introduced into the interior of the chlorination furnace body 11 from a gas delivery pipe 7 and a gas outlet 5, and after the pressure in the chlorination furnace body 11 reaches a set requirement, quartz sand is added into the chlorination furnace body 11 through a feed port 3; during the slow rotation of the chlorination furnace body 11, the quartz sand slides downward from the upper end of the chlorination furnace body 11, and slides and flows down layer by layer after being delayed and dispersed by a baffle 9, reacts with the high-temperature chlorine, and removes impurities; after the reaction is completed, the waste gas is firstly extracted from an exhaust port 6 for environmental protection treatment; and then a discharge port 8 is opened to collect the treated high-purity quartz sand.

Claims

1. A rotary dispersed quartz sand high temperature chlorination furnace, comprising a chlorination furnace body (11), a gas delivery pipe (7), a rotating device (4), a heating element (10), a furnace shell (12) and a bracket (13); the rotating device 4 is installed at both upper and lower ends of the chlorination furnace body (11), the rotating device 4 comprises a rotating driving wheel (4-1) and a fixing clamp ring (4-2); the upper end of the chlorination furnace body (11) is externally connected to a temperature measuring thermocouple (1), a gas pressure sensor (2) and a feed port (3); the lower end of the chlorination furnace body (11) is externally connected to an exhaust port (6) and a discharge port (8); the inner wall is provided with a baffle (9); the outer periphery of the chlorination furnace body is provided with a heating element (10), a furnace shell (12) and a bracket (13); the gas delivery pipe (7) enters the interior of the chlorination furnace body (11) from the lower end of the chlorination furnace body (11), and near the upper end of the chlorination furnace body (11), the top end of the gas delivery pipe (7) is provided with two gas outlet holes (5).

2. The rotary dispersed quartz sand high temperature chlorination furnace according to claim 1, characterized in that The chlorination furnace body (11) can rotate slowly during the chlorination process.

3. The rotary dispersed quartz sand high temperature chlorination furnace according to claim 1, characterized in that The chlorination furnace body (11) is a large-diameter thick-walled quartz glass tube, and its wall thickness is greater than 15 mm.

4. The rotary dispersed quartz sand high temperature chlorination furnace according to claim 1, characterized in that The chlorination furnace body (11) is installed in a manner of being inclined at 10-20°.

5. The rotary dispersed quartz sand high temperature chlorination furnace according to claim 1, characterized in that The baffle (9) is made of quartz glass and has a thickness of 20 mm.

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