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coal
Coal comes from ” Minecraft ” and is a renewable resource . It is harvested from coal ore and 1-3 obtained by killing wither skeletons. Coal ore can be mined using any pickaxe . The main use is as fuel or to make torches , and some villagers can exchange 15 coal for an emerald .   get   The most basic method is to mine coal ore. Mining a coal ore with a pickaxe will drop one coal, and mining it with a luck- enchanted pickaxe has a chance to drop more coal. Mining a coal ore has a 2/3 chance of dropping an experience orb.   Killing wither skeletons also has a chance to drop 1-3 coal. This makes coal a renewable resource.   If coal ore is mined with a Silk Touch enchanted pickaxe , a coal ore block will be dropped. Coal ore can be smelted into 1 coal, but since it can be mined directly into coal, burning coal ore into coal is far from ideal.   use   As a fuel for the furnace, coal is a very efficient item. One coal can smelt 8 units of items. &n...
cnauto
213
March 3, 2024
natural sand
Natural sand is formed by natural conditions (mainly rock weathering ). Rock particles with a particle size of less than 5 mm include natural sea sand , lake sand, river sand or gravel sand (that is, minerals are naturally split into fine sand particles).   product definition   According to the ” Import and Export Tariff of the People’s Republic of China (2020) ” and the ” Commodity and Item Notes of the Import and Export Tariff (2017)”, except for metallic ores with commercial extraction value which are classified in Chapter 26, heading 25.05 includes various Natural sea sand, lake sand, river sand or gravel sand (i.e. minerals naturally broken down into fine sand grains), but excluding sand and powder produced artificially (for example, by crushing) (classified in heading 25.17 or classified as related stone materials) ).   Classification and main uses   Silica sand and quartz sand   Silica sand and quartz sand are used in the c...
cnauto
107
March 3, 2024
aluminum silicate
Aluminum silicate is a kind of silicate with the chemical formula Al 2 SiO 5 . Since the structures of most silicates are very complex, they are often not written in the form of salts but in the form of the respective oxides of the metals. Therefore, aluminum silicate is often called Written as Al 2 O 3 ·SiO 2 . The density of aluminum silicate is 2.8 to 2.9 grams/cubic centimeter, and its refractive index is 1.56. Its Mohs hardness is related to the type of ore and moisture content, ranging from 4.5 to 7.5. Aluminum silicate powder is often used as fireproofing material , for example in the glass industry for building glass kilns.   Introduction   Aluminum silicate: Made from hard clay clinker as raw material, it is produced through resistance or electric arc furnace melting and injection fiber forming processes. Aluminum silicate is an aluminum silicate, appearance: colorless crystals. Dissolution: Insoluble in water.   characteristic   Low thermal conductivity, ...
cnauto
104
March 1, 2024
mica
Mica is a rock-forming mineral with a hexagonal flake crystal form and is one of the main rock-forming minerals. Mica crystals have a layered structure inside, so they are flake crystals, mainly hexagonal flake crystals. Its characteristics are insulation and high temperature resistance. Sericite is the most commonly used in industry and is widely used in coatings, paints, electrical insulation and other industries.   Species introduction   Mica is the general name for mica minerals, which are aluminum silicates of potassium, aluminum, magnesium, iron, lithium and other metals. They are all layered structures and monoclinic. The crystals are pseudo-hexagonal flakes or plates, and occasionally columnar. The lamellar cleavage is very complete, with a glassy luster, and the flakes are elastic. The refractive index of mica increases correspondingly with the increase of iron content, and can range from low positive protrusion to medium positive protrusion. The iron-free variant i...
cnauto
128
February 29, 2024
colored sand
Colored sand is now divided into natural colored sand , sintered colored sand , temporarily dyed colored sand , and permanently dyed colored sand . Its characteristics are: bright color, acid and alkali resistance, UV resistance, and non-fading. Natural colored sand: made from crushed natural ores, does not fade but has more impurities; temporary dyed colored sand: brightly colored and easy to discolor.   Colored sand classification   The main uses of natural colored sand are in building materials;   In addition to square boards and block stones for exterior walls, natural colored sand can also be made into any shape. Holes and grooves are processed on the surface of the natural colored sand to give the exterior and interior walls a special optical and visual effect. Using natural colored sand in the front building of the house can make the entire building look more grand and the building structure more three-dimensional. For example, adding horizontal footings, protrud...
cnauto
221
February 29, 2024
calcium carbonate
Calcium carbonate is an inorganic compound with the chemical formula CaCO₃. It is the main component of limestone, marble, etc. Calcium carbonate is usually white crystal, odorless, basically insoluble in water, and easily reacts with acid to release carbon dioxide [1]. It is one of the common substances on the earth. It is found in rocks such as aragonite, calcite, chalk, limestone, marble, and travertine. It is also the main component of some animal bones or shells. Calcium carbonate is also an important building material and is widely used in industry.   nature   physical properties   Calcium carbonate is white fine crystalline powder, tasteless and odorless. There are two forms: amorphous and crystalline. The crystal form can be divided into orthorhombic crystal system and hexagonal crystal system (calcium carbonate anhydrous is colorless orthorhombic crystal, calcium carbonate hexahydrate is colorless monoclinic crystal [4]), columnar or diamond-shaped, with a dens...
cnauto
109
February 26, 2024
Ventilator
In modern clinical medicine, ventilators, as an effective means of artificially replacing autonomous ventilation function, have been widely used in respiratory failure caused by various causes, anesthesia respiratory management during major surgery, respiratory support treatment and emergency resuscitation. It occupies a very important position in the field of modern medicine. The ventilator is a vital medical equipment that can prevent and treat respiratory failure, reduce complications, and save and extend the patient’s life.     basic introduction   A ventilator is a device that can replace, control or change a person’s normal physiological breathing, increase lung ventilation, improve respiratory function, reduce respiratory work consumption, and conserve heart reserve capacity. When infants and young children are complicated by acute respiratory failure and active conservative treatment is ineffective, breathing is weakened, phlegm is abundant and thick...
cnauto
107
February 26, 2024
Health Care Products
Health products are the popular term for health food. Article 3.1 of GB16740-97 “General Standard for Health (Functional) Foods” defines health food as: “Health (functional) food is a type of food that has the common characteristics of general food, can regulate the functions of the human body, and is suitable for consumption by specific groups of people. , but not for the purpose of treating diseases.” Therefore, in the promotion of products, related words such as efficiency and success rate cannot appear. The health-care effects of health foods are gradually being accepted by the general public in today’s society. Health products are a general name in mainland China. In foreign countries, including Hong Kong, Macao and Taiwan, they are generally called dietary supplements (Dietary Supplements). On January 8, 2019, 13 departments including the State Administration for Market Regulation jointly deployed a 100-day operation to rectify chaos in the “he...
cnauto
107
February 26, 2024
benzene
Benzene is a highly flammable, aromatic, colorless liquid at room temperature . It is an organic compound and the aromatic hydrocarbon with the simplest structure . Benzene is highly toxic and is also a carcinogen . It is difficult to dissolve in water and has a density less than water. It is easily soluble in organic solvents and can also be used as an organic solvent itself. Benzene is also a basic raw material in the petrochemical industry. The output and technical level of benzene are one of the indicators of the development level of a country’s petrochemical industry.     basic introduction   Benzene ( C₆H₆ ) organic compound is an aromatic hydrocarbon with the simplest structure . It is a colorless, sweet, oily, transparent liquid at room temperature. Its density is less than that of water and it has a strong special smell. It is flammable, toxic and is an IARC Category 1 carcinogen. Benzene is insoluble in water, easily soluble in organic solvents, and can ...
cnauto
109
February 26, 2024
Adhesive
Bonding agent is one of the most important auxiliary materials and is widely used in packaging operations. Adhesives are sticky substances that join two separate materials together by their viscosity . There are many types of adhesives.     Introduction   Adhesive is actually a general term for various stress materials that connect or fit the same or different materials. There are three main types: liquid, paste and solid.   Classification   There are many types of adhesives, which can usually be classified as follows:   Material source points   ①Natural adhesive It is derived from substances found in nature. Including starch , protein, dextrin , animal glue , shellac, hide glue, rosin and other biological adhesives; also includes mineral adhesives such as asphalt .   ②Synthetic adhesive Mainly refers to artificially synthesized substances, including inorganic adhesives such as water glass, and organic adhesives such as synthetic resin and synth...
cnauto
111
February 21, 2024
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