Obviously you ignored the link I gave you.
No I checked your link. I did not post my link
What Type of Extinguishers are Rated as Class D Fire Extinguishers?
Unfortunately, Class D fires cannot simply be extinguished with water or just any extinguishing agent. Water interacts with the combustible metal intensifying the fire, increasing the heat and spreading molten metal.
Thus, it is imperative that only a Class D fire extinguisher is used to extinguisher a combustible metal fire. The best way to extinguish these fires is by smothering them & eliminating the oxygen element.
The agent also helps to absorb the heat from the fuel.To date, the only type of Class D fire extinguisher is the Dry Powder extinguisher. The powder agent used may be either powdered graphite, granular sodium chloride or copper based, all of which are effective at separating the fuel (the ignited combustible metal) from the oxygen.
While dry powder extinguishers are effective for Class D fires, they are not effective for any other class of fire. It is important that those working around combustible metals understand the unique properties of Class D fires as well as how (and when) to properly and safely operate a Class D fire
extinguisher
https://blog.koorsen.com/what-is-a-class-d-fire-extinguisher-used-for