1. The technical principle of firestone

Generally manufacture of fire stone alloys, which are widely used in mixed rare earth metals, which are mainly ravioli.Contains light rare earth elements such as , , and .The chemical properties of the rare earth metal are lively, and the affinity of oxygen is strong, while the temperature of the coaching point of the metal of the cricket group is very low ( is 165 C, is 290 , is 270 C), and a lot of calories are released when burning.

2. How to use firestone

Use a metal blade to slowly scrape the stones, producing some dandruff in a small pile of dried grass, leaves, or paper, and quickly planned magnesium strips to produce Mars to cause magnesium to ignite magnesium dandruff.When the flame is generated, add a thin wooden stick to form a flame.

The reliability of super fire stones has made it the favorite of Outdoor experts, hunters, fishing enthusiasts and campers.It is also a simple way to ignite the stove and gasoline barbecue in the hut or the backyard.It is surprising that it can also work normally in a humid environment.Everyone will be happy to make a fire in order to be able to use such a simple Tool.

3. How to test the quality of fire stones

1. Visual inspection

Through the visual inspection, you can find the surface defects of the product.Such as the cold partial and underwriting of the ingot; the flaws of bubbles, coke heads, thickness and oval deformation strips in the squeeze; flowers, paint, oblique head, mechanical damage, etc. on the surface of the finished particles.

2. Gold phase test

Gold -phase inspection is usually the organizational structure of the alloy to judge its alloy performance, but in production.For some defects that are difficult to judge, they are commonly used for micro -examinations for some sections of alloys. This is a type of monitoring of ingots and firestone alloys.

3. Elemental chemistry analysis

There are different formulas for firestone, and their compositions are different, but the main ingredients are rare earth metals and iron.Add a small amount of alloy composed of a variety of elements such as magnesium zinc and copper.Analysis of the content of firestone products is of great significance for stable normal production and ensuring the quality of firestone.

Preparation of sample solution: Put a certain amount of fire stones and put it in a cup.Add water, add concentrated hydrochloric acid, and heated for decomposition, and then gradually add to nitric acid to dissolve clearing, and then move into the capacity bottle, which is the required sample solution.

(1) Total amount of rare earth: measurement with oxalate weight method.Settle with dilute oxalic acid solution, filter, burns, and weight.Get its total rare earth oxide.

(2) Measurement of : Taking neighboring (neighboring as an indicator, and ticking with iron sulfate according to standard solution.

(3) iron determination: Dripped with a standard solution for potassium potassium potential indicator with potassium sulfur.

(4) Determination of copper: starch as an indicator.Dripped with sodium sulfate.

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