I. Calcium carbide production process
Burnt lime is crushed and screened, and then sent to the lime warehouse for storage and use. The lime and coke that meet the demand of calcium carbide production are dosed according to the specified ratio, and the furnace charge is sent to the top of the furnace silo by bucket elevator, and then fed into the furnace through the material pipe, and the furnace charge generates calcium carbide through the electrode arc pads and resistive heat reaction of the furnace charge in the furnace.
The calcium carbide is taken out of the furnace at regular intervals and put into the calcium carbide pot, and after cooling, it is crushed into certain required particle size specifications to get the finished calcium carbide. In the calcium carbide furnace, the heat generated by the electric arc and resistance to the charge heated to 1900-2200 ℃, the total chemical reaction formula: CaO + 3C = CaC2 + CO + 10800 kcal
The second, calcium carbide furnace production process
1, batching, loading and roof fabric
Qualified raw materials from the raw material processing plant by measuring, batching, and then sent to the electric furnace workshop material from the bucket After being measured and dosed by the raw material processing workshop, qualified raw materials are sent into the electric furnace workshop silo by bucket elevator, and then the materials are sent into the furnace top ring silo by the furnace top fabrication facility, fixed belt conveyor and ring fabrication machine. Furnace top charging facility cloths the charge into the silo as needed and adds it to the electric furnace in batches by the electric furnace charging pipe.
2, electric furnace
Semi-closed calcium carbide furnace is composed of furnace body, furnace cover, electrode handle, electrode pressure release and electrode lifting device, is the main equipment for the production of calcium carbide. The furnace is powered by a transformer, the charge is reacted at high temperature in the furnace to generate calcium carbide and release carbon monoxide gas, the generated calcium carbide is discharged out of the furnace by the discharge port, and the mouth of the furnace is opened with a burn-through device, and the molten calcium carbide flows into the calcium carbide pot on the cooling trolley.
The electrode pressure and release is hydraulic control, using a single layer of cylinder clamping lifting electrode conical ring cylinder clamping conductive jaw plate, electrode normal lifting and lowering by the fourth floor of the three winches control, electrode lifting, pressure and release, clamping, down control all in the second floor operation room by electric button control.
The electric furnace is powered by the transformer, the charge is reacted with high temperature in the furnace to generate calcium carbide and release carbon monoxide gas, the generated calcium carbide is discharged from the outlet, and the outlet is opened by the burner, the molten calcium carbide is flowed into the calcium carbide pot on the cooling trolley.
The exit furnace is equipped with a baffle screen and an arc eyeleting frame, and there is a fume hood above the exit port, which extracts the fumes generated when the furnace is discharged with a ventilator.
3, electric furnace cooling, crushing and packaging
Molten calcium carbide in the calcium carbide pot with the top of the car machine pulled to the corridor or packaging room for cooling, calcium carbide solidification, with a bridge-type crane and a single clamp will be lifted out of the weight of the calcium carbide, placed on the cast iron ground cooling, cooling to the right degree of calcium carbide crushed to a qualified particle size, and then divided into equal parts of the packaging, sent to the finished product warehouse.
Expanded information: People's Daily Online, Beijing, May 2 (Xinhua) -- According to the website of Shenmu Municipal Government of Shaanxi Province, at about 1:10 a.m. on May 2, Shaanxi Hengyuan Investment Group of Shenmu City Electrochemical Co. 2 # calcium carbide furnace occurred in a burn accident, resulting in 20 people with different degrees of burns. After the incident, Shenmu City started the emergency plan, set up medical treatment, accident investigation and other five working groups, to carry out all efforts to rescue the injured and accident investigation and other work. At present, the injured are all sent to the hospital for treatment, of which two people died after rescue, the remaining 18 people are being treated. People's Daily Online - A burn accident at an electrochemical company in Shenmu, Shaanxi, has resulted in 2 deaths and 18 injuries