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 电阻炉选型需要考虑那些问题?

电阻炉是指以电流通过导体所产生的的焦耳热为热源的加热炉,常用的发热元件有电阻丝、电阻带等。与传统的火焰炉比,电阻炉热效率高,热度容易控制、炉温均匀、炉体寿命长,缺点是耗电费用高。电阻炉可用于金属、陶瓷的烧结、溶解和分析;也可用于实验室对元素进行进一步分析和测定;机械工业中也常用电阻炉来进行金属锻前加热、低熔点金属熔化、砂型和油漆膜层的干燥、小型钢件热处理加工等。
Resistance furnace refers to the heating furnace with Joule heat generated by current passing through the conductor as the heat source. The commonly used heating elements include resistance wire, resistance belt, etc. Compared with the traditional flame furnace, the resistance furnace has the advantages of high thermal efficiency, easy heat control, uniform furnace temperature and long service life. The disadvantage is high power consumption. Resistance furnace can be used for sintering, dissolution and analysis of metals and ceramics; It can also be used for further analysis and determination of elements in the laboratory; Resistance furnace is also commonly used in mechanical industry to heat metal before forging, melt low melting point metal, dry sand mold and paint film, heat treatment and processing of small steel parts, etc.
按加热温度分,工作温度在650℃以下的电阻炉为低温炉,650~1000℃为中温炉,1000℃以上为高温炉。
According to the heating temperature, the resistance furnace with working temperature below 650 ℃ is a low-temperature furnace, 650 ~ 1000 ℃ is a medium temperature furnace, and above 1000 ℃ is a high-temperature furnace.
按传热方式分,电阻炉分为辐射式电阻炉和对流式电阻炉。辐射式电阻炉以辐射传热为主,对流传热作用较小;对流式电阻炉以对流传热为主,通常称为空气循环电阻炉。在高温和中温炉内主要以辐射方式加热。在低温炉内则以对流传热方式加热。
According to the heat transfer mode, the resistance furnace is divided into radiation resistance furnace and convection resistance furnace. Radiant resistance furnace is dominated by radiant heat transfer, and the effect of convective heat transfer is small; Convection resistance furnace is mainly convective heat transfer, which is usually called air circulation resistance furnace. It is mainly heated by radiation in high-temperature and medium temperature furnaces. In the low-temperature furnace, it is heated by convection heat transfer.
电阻炉的基础选购很简单,只要关注两个基础参数即可:容积和温控范围。但在此之外,搜科采购管家认为要选择一台性价比高、使用寿命长的电阻炉,你还需要考虑以下事项:
The basic purchase of resistance furnace is very simple. Just pay attention to two basic parameters: volume and temperature control range. However, in addition, the purchasing housekeeper of Soke believes that to choose a resistance furnace with high cost performance and long service life, you also need to consider the following matters:
1.炉膛等级和材料
1. Furnace grade and material
不同炉膛材料的电阻炉加热效果、使用寿命会有一些差距。高温电阻炉的炉膛可以分为四个等级:
There will be some differences in heating effect and service life of resistance furnace with different furnace materials. The furnace of high temperature resistance furnace can be divided into four grades:
普通耐火材料,造价低,受热有限;
Ordinary refractory, low cost, limited heating;
高温铝炉膛,适用于不含碳的试验;
High temperature aluminum furnace, suitable for carbon free test;
碳化硅炉膛,升温速度不快,加热对比好;
Silicon carbide furnace, slow heating rate and good heating comparison;
陶瓷纤维炉膛,升温速度快,但有时温度过高也有焚毁炉膛的风险。
Ceramic fiber furnace has a fast heating rate, but sometimes the temperature is too high, which also has the risk of burning the furnace.
综合来说,实验室采购高温电阻炉,搜科建议您还是选碳化硅炉膛比较好。
Generally speaking, when purchasing high-temperature resistance furnace in the laboratory, Soko recommends that you choose silicon carbide furnace.
2.炉膛高温度
2. High furnace temperature
每个电阻炉都标称了温度范围,但在实际应用中,您要区别仪器设计温度和使用温度的区别。
Each resistance furnace has a nominal temperature range, but in practical application, you should distinguish the difference between instrument design temperature and service temperature.
一般来说,要选择比您的使用温度数值稍高一些的产品,因为炉膛标称的高设计温度,使用时因各种条件限制可能并不能达到高温度。
Generally speaking, you should choose products that are slightly higher than your service temperature, because the nominal high design temperature of the furnace may not reach the high temperature due to various conditions.
3.加热元件
3. Heating element
高温电阻炉加热元件一般有电阻丝、硅碳棒、硅钼棒三种。通常来说1000-1200度用电阻丝,1300度用硅碳棒。
The heating elements of high-temperature resistance furnace generally include resistance wire, silicon carbide rod and silicon molybdenum rod. Generally speaking, resistance wire is used for 1000-1200 degrees and silicon carbide rod is used for 1300 degrees.
4.炉体结构
4. Furnace structure
电阻炉有一体式和分体式两种。一体式电阻炉将温度控制与炉体设计合为一体,无须安装直接使用。分体式电阻炉需要将温度控制仪先安装在炉体上,再进行下一步的安装配置,步骤较为繁琐。但分体式电阻炉通常相对便宜一些。
There are two types of resistance furnace: integrated type and split type. The integrated resistance furnace integrates temperature control and furnace body design, and can be used directly without installation. The split resistance furnace needs to install the temperature controller on the furnace body first, and then carry out the installation and configuration in the next step, which is cumbersome. But split resistance furnaces are usually relatively cheap.
除此之外,您还可以了解一下电阻炉的炉温控制系统,温度控制系统主要由感温元件和与之相匹配的测温线路以及温度控制仪表构成。炉温均匀的电阻炉才能在试验中有更好的表现。
In addition, you can also learn about the furnace temperature control system of resistance furnace. The temperature control system is mainly composed of temperature sensing elements, matching temperature measuring circuits and temperature control instruments. The resistance furnace with uniform furnace temperature can perform better in the test.
以上就是为大家介绍的有关盆景制作山东电炉的详细介绍,希望对您有所帮助.如果您有什么疑问的话,欢迎联系我们.我们将以专业的态度,为您提供服务/
The above is a detailed introduction about bonsai making Shandong electric stove. I hope it will help you If you have any questions, please contact us We will provide you with professional service /

 
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