Urgently ask for an article, about the coal mine, the subject is not limited, thank you!

Coal miners' marital problems.

What girl would marry someone who went down to the coal kiln? Don't say anything else, I am afraid every day. It doesn't have a status yet. Coal miners' wages are not high. Fight against the five major natural disasters every day, and if you are not careful...

I am a miner, weaving colorful dreams in this black world, digging the light of will in the depths of the earth. With wisdom and sweat, he continues the myth of Kuafu chasing the sun.

The deep lanes remember the trajectory of life, and the roaring tunneling of the wind drill is head-on, rolling the waves of youth; The black and translucent coal face is the ridge where I harvest Ugin, the hydraulic support lifts the hope of safety, and the shearer lifts the veil of the primeval forest.

Taking over the baton of the predecessors, devoting themselves to the hot mine, innovating in inheritance and developing in innovation, miners in the new era can no longer only know that they are immersed in hard work, and the road of hope of the mine needs to be led by science and technology.

How many years of fighting in the coal sea have cultivated solid wings. No matter how many merciless winds and monstrous waves there are on the way, I can scientifically explore and dig up the treasures underground.

Just like the black charcoal, under the simple overalls is my hot feelings, I chose the coal mine, and I established the coordinates of life.

Anthracite: Anthracite has high fixed carbon content, low volatile yield, high density, high hardness, high ignition point, and no smoke when burning. Black is hard with a metallic sheen. It is not stained by grease friction, and the fracture is in the shape of a shell, and the flame is short and less smoke when burning. No coke.

Lignite: Lignite, also known as firewood coal, is the mineral coal with the lowest degree of coalification. A brownish-black, matte low-grade coal between peat and bituminous coal.

Since it is rich in volatiles, it is easy to burn and smoke. Traces of the original wood can be clearly seen on the profile. Contains humic acid that is soluble in lye.

The carbon content is 60 77, the density is about, and the volatile content is greater than 40. No gum layer thickness. The calorific value is about megajoules kg (5500-6500 kcal kg).

It is mostly brown or brownish-black, with relative density. Among them, lignite can be divided into two types: (1) brown coal, which is loose and soft; (2) Dark lignite, dense and hard.

It can be directly used as household fuel, industrial heat source fuel and power generation fuel, and can also be used as a raw material for gasification and low-temperature dry distillation.

Bituminous coal: coal with a long flame and bituminous coal when burning, coal with a large degree of coalification. The appearance is grayish-black to black, and the powder is brown to black.

It is composed of shiny and matte parts that are combined with each other to form a layered shape, with asphalt, grease, glass, metal, diamond and other luster, with obvious band-like and convex mirror-like structure.

Hebi Huanuo coal inspection instrument provides!