Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing calcium carbide at low temperature by electromagnetic induction technology

An electromagnetic induction, electromagnetic induction heating technology, applied in sustainable manufacturing/processing, climate sustainability, carbide and other directions, can solve the problems of shortening reaction time, high energy inefficiency, lowering reaction temperature, etc., to improve the reaction rate, The effect of fast heating rate and high reaction efficiency

Active Publication Date: 2022-07-12
北京道思克能源设备有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for synthesizing calcium carbide at low temperature using electromagnetic induction heating technology. Through a large number of creative experiments, the technical problem that electromagnetic induction is directly used for coke heating to produce calcium carbide is solved, the reaction time is greatly shortened, and the reaction temperature is reduced. Solve the problem of "high energy and low efficiency" existing in the existing industrial calcium carbide production technology

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take biomass and quicklime as raw materials, crush and sieve powder with particle size of 85μm-125μm, weigh the powder according to the molar ratio of carbon and calcium to 10:1, mix it evenly, and press it into a columnar mixed raw material with a particle size of about 20mm. ; The columnar mixed raw material is pyrolyzed at 1200 ℃ to obtain a mixed material of coke and CaO; the mixed material after pyrolysis is directly sent to the induction furnace through the heat conveying device without cooling, and heated to 1850 ℃ under the condition of 400 kHz, and treated Calcium carbide was prepared in 25min, and the yield of calcium carbide was 99%.

Embodiment 2

[0035] Take coal and slaked lime as raw materials, crush and sieve powder with a particle size of 60 μm-150 μm, weigh the powder with a carbon-to-calcium molar ratio of 6:1 and mix it evenly, and press it into a columnar raw material with a particle size of about 25 mm; The columnar raw material is pyrolyzed at 1200°C to obtain a coke and CaO mixture; the pyrolyzed mixture is directly sent to an induction furnace through a heat conveying device without cooling, heated to 1900°C at 850 kHz, and treated for 8 minutes. Calcium carbide was obtained, and the yield of calcium carbide was 96%.

Embodiment 3

[0037] Take biomass and limestone as raw materials, crush and sieve powder with particle size of 40μm-120μm, weigh the powder according to the molar ratio of carbon to calcium of 5:1 and mix it evenly, and press it into a columnar raw material with a particle size of about 30mm; The columnar raw material was pyrolyzed at 1300°C to obtain a mixture of coke and CaO; the pyrolyzed mixture was directly sent to an induction furnace through a heat conveying device without cooling, heated to 1900°C at 1000kHz, and treated for 5min Calcium carbide was prepared, and the yield of calcium carbide was 98%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thermal decomposition temperatureaaaaaaaaaa
sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing calcium carbide at low temperature by utilizing electromagnetic induction technology, and belongs to the technical field of chemical production. The method includes the following steps: (1) raw material preparation: the carbon-containing compound and the calcium-containing compound are uniformly mixed, shaped, and pyrolyzed to obtain a coke and calcium oxide mixed raw material A; or, the coke is directly mixed with the calcium-containing compound to obtain a mixed raw material B (2) calcium carbide synthesis: the mixed raw material A and / or the mixed raw material B is heated to 1450-1900 ℃ by electromagnetic induction heating, and the solid-state calcium carbide is synthesized by normal pressure reaction for 0.5 to 60 minutes. For the first time, the method realizes the direct heating of coke in the inductance without inductive medium, which greatly shortens the synthesis time of calcium carbide, reduces the reaction temperature, and solves the problem of "high energy and low efficiency" existing in the existing industrial calcium carbide production technology.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a method for preparing calcium carbide at low temperature by utilizing electromagnetic induction technology. Background technique [0002] Calcium carbide commonly known as calcium carbide (CaC 2 ), once known as the mother of organic synthesis. At present, it is mainly used for the production of vinyl chloride, vinyl acetate and acrylonitrile. In 2020, my country's calcium carbide production is 27.58 million tons. [0003] Calcium carbide is prepared by the reaction of coke and lime at a certain temperature, the reaction formula is CaO+3C→CaC 2 +CO (gas) is a solid-solid endothermic reaction. The calcium carbide industry has a history of more than 100 years. At present, the main industrial production method is the electric arc method, that is, coke with a particle size of 5-40mm and lime with a particle size of 5-60mm are heated to 2000-2200 ℃ in an electric arc ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/942
CPCC01B32/942Y02P20/10
Inventor 刘振宇刘清雅潘岳
Owner 北京道思克能源设备有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com