Chinese name: Calcium
Water-soluble: Reacts with water
Appearance: silver white to off white powder
Characteristic and superiority
Calcium is softer than lead than magnesium. Face-centered cubic
α-Ca is converted to hexagonal crystalline γ-Ca at 464 ° C. Calcium
in the air is oxidized gradually darken, the more pure calcium
becomes darker more slowly. Slow reaction with water at room
temperature, heating is fast, intense reaction with acid, should be
stored in paraffin oil.Calcium in the air is oxidized gradually
darken, the more pure calcium becomes darker more slowly. Slow
reaction with water at room temperature, heating is fast, intense
reaction with acid, should be stored in paraffin oil.
1, deoxidation, desulfurization, degassing in steelmaking and cast
2, in the production of chromium, niobium, samarium, thorium,
titanium, uranium and vanadium and other deoxidation;
3, as an alloy material used in the lead industry to produce
maintenance-free automotive batteries, calcium-lead alloy can
increase the strength and improve corrosion resistance and creep
4, in a variety of non-ferrous metals, rare earth metals and
refractory metals as a deoxidizing agent;
5, In the production of aluminum, beryllium, copper, lead,
magnesium and other nonferrous alloy production as an alloying
6, in the production of high-purity steel and non-ferrous alloy as
7, In addition to bismuth in lead smelting industry and lead
|Solubility||Do not dissolve in benzene, kerosene, slightly soluble in ethanol,
soluble in acid, liquid ammonia.|
|ph||11 to 12 (1% solution)|
|Saturated vapor pressure (kPa)||1.33 (983 ° C)|
|Critical pressure (MPa)||15.3|
First, the leak emergency response
Isolate leaking pollution area and restrict access. Cut off the
fire. Recommended emergency personnel to wear self-contained
breathing apparatus, wear fire protective clothing. Do not touch
the spill directly. A small amount of leakage: rinse with plenty of
water, diluted with water into the waste water system. Large leaks:
water wetting, and then collected for recycling or shipped to the
disposal of waste disposal sites.
Second, protective measures
Respiratory protection: Wear a hood-type, electrically-powered,
filtered respirator when possible exposure to dust.
1 Eye protection: Respiratory protection has been protected.
2 body protection: wear plastic protective clothing.
3 hand protection: wear rubber gloves.
4 other: the work site is strictly prohibited smoking.
Third, first aid measures
1 Skin contact: Immediately remove contaminated clothing, rinse
with plenty of water for at least 15 minutes. Get medical
2 Eye contact: Lift the eyelid immediately, rinse thoroughly with
plenty of running water or saline for at least 15 minutes. Get
3 Inhalation: Remove quickly from the scene to fresh air. Keep the
airway clear. If breathing is difficult, give oxygen. If breathing
stopped, resuscitate immediately. Get medical attention.
5 Ingestion: Gargle with water, to drink milk or egg white. Get
6 fire fighting methods: No water, halogenated hydrocarbon agent
rescue, it is not appropriate to use carbon dioxide fire
extinguishing. In the fire, such as improper use of fire
extinguishing agents, but also violent reactions can occur, causing
an explosion, we must pay special attention to fire safety and
rescue. Extinguishing agents: dry graphite, soda ash, sodium