箱式炉又称马弗炉，是一种炉膛为箱形的间歇生产型加热炉，适用于煤炭、焦化产品、化工原料的化学分析，并广泛用于电力、煤炭、造纸、石化、水泥、农牧、医药科研、教学等行业对工件进行加热处理。其结构由炉膛、密封装置、循环风机及控制系统组成，炉膛采用不锈钢板并配有双向循环风道，门封采用陶瓷纤维绳与硅橡胶双重密封，炉后配置可控烟囱，具有操作简单、维修方便的特点。

The box furnace, also known as a muffle furnace, is an intermittent production-type heating furnace with a box-shaped chamber. It is suitable for the chemical analysis of coal, coking products, and chemical raw materials, and is widely used in industries such as electric power, coal, papermaking, petrochemicals, cement, agriculture and animal husbandry, pharmaceutical research, and education for heating treatment of workpieces. Its structure consists of a furnace chamber, a sealing device, a circulation fan, and a control system. The furnace chamber is constructed with stainless steel plates and equipped with bidirectional circulation air ducts. The door seal employs a dual-seal design with ceramic fiber rope and silicone rubber. The rear of the furnace is equipped with a controllable chimney, offering features such as simple operation and convenient maintenance.