Cradle to Consumer
Identity ID
afe652d5-e8a4-4dd0-b7a2-e56dc528c8c5
Materials
Associated ID
ca7afee2-c8c7-48f1-ba6f-acfec97b57c2
Included activities starts
Included activities ends
Description
This dataset is a market dataset representing the consumption market of the region. The dataset includes the transport of the product from the gate to the consumption end, and the transport service is calculated based on the transport situation of the product in the region. This process refers to the production activity of smelting 1 kg of calcium silicon alloy by the submerged arc furnace process. Calcium silicon alloy is a binary alloy composed of silicon and calcium, used as a deoxidizer and desulfurizer in the iron and steel industry and as an inoculant in the cast iron industry. This dataset includes the input of raw and auxiliary materials such as silica, lime, coke, charcoal and bituminous coal, and energy and energy media such as electricity and water; outputs include the product calcium silicon alloy, with waste silica fume and slag recoverable to cement plants, and emissions to water and air. The data inventory is formed by merging multi-source data, and the data representativeness is optimized using industry standards such as the 'Cleaner Production Standard - Iron and Steel Industry (Ferroalloy)' and the '3140 Ferroalloy Industry Coefficient Handbook'.
Activity Description
Calcium-silicon alloy is produced in a reduction electric furnace by reducing silicon dioxide and calcium oxide with a carbonaceous reducing agent. Two smelting routes are used: a two-step process and a one-step process. This production activity uses the one-step process with layered charging. The process is divided into three main sections: raw-material pretreatment, submerged arc furnace smelting, and finished-product manufacture. The specific steps are: 1) raw-material pretreatment; 2) batching and feeding; 3) submerged arc furnace smelting; 4) casting and cooling; and 5) microsilica collection and densification.
Process Description
Calcium-silicon alloy is a calcium-silicon binary alloy made from silica, lime and coke as raw materials and smelted in a high temperature environment of 1500-1800°C. The main components are silicon and calcium and contain impurities such as iron and aluminum. This alloy is used as a deoxidizer, desulfurizer and inoculant in the cast iron industry in the steel industry. Its deoxidation products are easily eliminated and can improve the properties of steel.
Time period
2015
2026
Geography
China,Heilongjiang
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Submerged arc furnaces use carbon as a reducing agent to reduce oxides in ores to produce ferroalloys. The mixed charge is added into the furnace, and the electrodes are buried in the charge. Heating is achieved by arc heat and resistance heat generated by the electric current passing through the charge. The molten metal and slag collect at the bottom of the furnace, and iron and slag are regularly tapped through the taphole. The production process is continuous.