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An energy-saving graphite high-temperature expansion furnace system

A technology of high-temperature expansion and graphite expansion, which is applied in the field of graphite expansion, can solve the problems of long heating time, long start-up heating time, and furnace temperature can not be kept at any time, etc., and achieve the effect of improving recovery rate, compact structure and reasonable design

Active Publication Date: 2020-09-29
浙江新瑞芯材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to structural and process reasons in the latter, there are disadvantages such as long start-up heating time, furnace temperature cannot be adjusted at any time, convenient adjustment (resulting in poor product quality), large energy consumption, and short service life of heating wire and silicon carbide rod; although the former The heating method is relatively advanced, but due to the structure of the furnace, the combustion chamber and the furnace are separated, and the furnace is almost a straight tube with a large diameter (and very long), so there are also problems such as long heating time (generally 1-3 hours), high energy consumption (for example, liquefied petroleum gas is generally 160-180 kg / ton product), low heat utilization rate, large heat loss, large furnace body, large investment and other disadvantages

Method used

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  • An energy-saving graphite high-temperature expansion furnace system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The carbon content of raw graphite is 99.5% (+50 mesh), expandable graphite (expansion ratio 300ml / g, solution pH value is 6.5~6.8) prepared by sulfuric acid, and the feed rate is 45kg / h.

[0046] The liquefied petroleum gas or pipeline gas in the gas pipe 06 is sprayed into the vertical furnace 12 after being ignited by the jet ignition device 07 through the first valve 08. Before ignition, the discharge fan 24 should be turned on to form a negative pressure in the furnace. In 30 minutes, the temperature measurement and display device 19 indicates that the furnace temperature can reach 980°C. Now, open the airtight unloader 29 and the feeding fan 04, the raw graphite in the feed bin 01 enters the vertical furnace 12 through the feed pipe 03, and then is uniformly heated and heated in the vertical furnace 12 and the spiral furnace 13. After puffing for about 15-30 seconds, it enters the primary solid-gas separator 20 through the discharge pipe 21, and finally passes thr...

Embodiment 2

[0049] If only the raw graphite is replaced with expandable graphite with a carbon content of 99.0% (+80 mesh) and sulfuric acid (expansion ratio 280ml / g, pH value of the solution is 6.0-6.7), the feeding speed is 60kg / h , according to the production conditions of Example 1, the output can be 51.0kg / h, the yield is 85%, and the expansion ratio is 288cm 3 / g product.

Embodiment 3

[0051] It is 99.2% (+80 order, expandable graphite (expansion ratio 200ml / g, the pH value of solution is 6.1~6.5) prepared by sulfuric acid if only raw material graphite is changed into carbon content, feed rate is at 50kg / h, According to the production conditions of Example 1, then the yield that can be obtained is 43.0kg / h, the productive rate is 86%, and the expansion ratio is 210cm 3 / g product.

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Abstract

The invention discloses an energy-saving graphite high temperature expansion furnace system. The system comprises a feeding system, a combustion system, a graphite expansion furnace and a solid-gas separation system. The graphite expansion furnace comprises an outer furnace body (11), a hearth and a heat insulation layer (14) formed between the hearth and the outer furnace body (11). The hearth comprises a vertical hearth (12) extending up along the bottom wall of the outer furnace body (11) and a spiral hearth (13) communicated with the vertical hearth (12). The vertical hearth (12) comprisesa lower opening communicated with the combustion system, an upper opening communicated with the spiral hearth (13) and a feeding inlet (125) arranged at the bottom of the vertical hearth (12) and communicated with the feeding system, the bottom of the outer furnace body (11) is provided with a discharge outlet (110) and the spiral hearth (13) is communicated with the solid-gas separation system through the discharge outlet (110). The system saves energy, has high efficiency and increases an expanded graphite yield.

Description

technical field [0001] The invention relates to the technical field of graphite expansion, in particular to a graphite high-temperature expansion furnace system. Background technique [0002] Expanded graphite is a new type of composite material on the atomic and molecular scales formed by inserting foreign substances between graphite layers, and has become a new development direction in the graphite industry. It not only retains the excellent physical and chemical properties of graphite, but also produces a series of new physical and chemical properties due to the interaction between the carbon atom plane and the intercalated substance, such as high electrical conductivity, superconductivity, catalytic properties, hydrogen storage properties, etc. The expanded graphite obtained by high-temperature expansion looks like a worm, has stable thermodynamic properties, has a very large specific surface area and rich pore structure, and can be used as an adsorption material for org...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/225
CPCC01B32/225Y02P20/10
Inventor 孙飞田金星罗立群
Owner 浙江新瑞芯材科技有限公司