What is the difference between mineral wool and rock wool

Rock wool and slag wool belong to the same mineral wool, and there are many commonalities between them in terms of production process, fiber form, alkali resistance, thermal conductivity, non-combustibility, etc. People usually refer to rock wool and slag wool as mineral wool, so it is easy to see the two as the same thing, and even think that slag cotton is white in color, more "pure" than gray-green rock wool, which is a misunderstanding. Although they are both mineral wools, there are some differences that cannot be ignored.

The main reason for these differences is the difference in the composition of raw materials. 1. Comparison of chemical composition and acidity coefficient of rock wool and slag wool In China, the main raw material of slag cotton is generally blast furnace slag or other metallurgical slag, and the main raw material of rock wool is basalt or diabase, and their chemical composition is quite different. 2. The difference in the performance of rock wool and slag wool The difference in chemical composition and acidity coefficient between rock wool and slag wool leads to certain differences in their performance.

3. The difference between the corrosion resistance of rock wool and slag wool One of the main functions of the blast furnace in smelting is to remove most of the sulfur in pig iron and prevent hot brittleness in pig iron during use. The sulphur removed remains in the blast furnace slag in the form of calcium sulfide (CAS). In the production of slag wool, this part of the cas then enters the slag wool, and its content is about 5%.

When the slag wool is used in a humid environment, the Cas in it will be decomposed into Ca(OH)2 and H2S when exposed to water: CAS + 2H2O= Ca(OH)2 + H2S. Both of these reaction products have adverse effects on the use of slag wool:

Ca(OH)2 makes the water alkaline, and the -2Cao·SiO2 in the slag wool is excited by the alkaline aqueous solution, which promotes the hydration reaction, and further reduces the water resistance of the slag cotton. H2S gas can be dissolved in water to form hydrosulfuric acid, which will corrode when in contact with metal. Rock wool is generally made of basalt or diabase as raw material, except for the trace amount of sulfur brought in by coke during smelting, there is no more sulfur**, so it has no corrosive effect on metal. In fact, whether it is rock wool or slag wool, it is inevitable that it will come into contact with metal and the presence of water vapor during its use, so the difference between these two materials in terms of corrosion resistance cannot be ignored in the selection of materials.

Many people confuse the two concepts of rock wool and mineral wool, this is because rock wool and slag wool are collectively referred to as mineral wool, that is to say, rock wool must be mineral wool, but mineral wool is not necessarily rock wool, because when it comes to mineral wool, it may also be a slag surface, which is the difference between mineral wool and rock wool. I hope the answer from "Uetersen" can help you!

1. The material is different.

2. **Different.

3. The acidity coefficient is different.

Empirical Steps:1. The material is different. The main content of rock wool is basalt, and the content of mineral wool is only slag.

2. **Different. Mineral wool is much cheaper, of course, the thermal insulation performance is not as good as rock wool.

3. The acidity coefficient is different. The acidity coefficient mk of rock wool is generally greater than or even higher than that; The MK of slag wool can generally only be kept around and around, and it is difficult to exceed.

The differences between rock wool and mineral wool are as follows:

First, the nature is different

Rock wool board is an inorganic fiberboard made of basalt as the main raw material and processed by high temperature melting. Mineral wool board: A decorative board made of mineral wool.

Second, the characteristics are different

Rock wool board is characterized by fireproofing. The raw material of the exterior wall rock wool board is natural volcanic rock, which is a non-flammable building material fireproof material. The outer layer of rock wool board has elongated, flexible fibers and low slag ball content.

As a result, the thermal conductivity is low and the thermal insulation effect is good. A large number of slender fibers form a porous connection structure of stone wool, which determines that Schmida stone wool is an excellent sound absorption and noise reduction material.

The mineral wool board has a good decorative effect, and the mineral wool board has a colorful plane roller pattern and relief and three-dimensional modeling. It has both classical beauty and fashion taste.

Third, the performance is different

The difference in chemical composition and acidity coefficient between rock wool and slag wool leads to certain differences in their properties. Rock wool has stable chemical properties, pH value of 7-8, neutral or weakly alkaline, carbon steel, stainless steel, aluminum and other metal materials are not corrosive.

Fourth, the application is different

Rock wool boards are mostly used in industrial buildings. Mineral wool board is mainly used in conference halls, libraries, halls, high-end hotels, gymnasiums, hospitals, office buildings, production workshops and other places with sound absorption requirements.

Production process of stone wool:

The production process of rock wool is actually a simulation of the natural process of volcanic eruption in Hawaii, and the rock wool products are made of high-quality basalt, dolomite, etc. as the main raw materials, and after melting at a high temperature of more than 1450, the international advanced four-axis centrifuge is used to centrifuge into fibers at high speed;

At the same time, a certain amount of binder, dustproof oil and water-repellent agent are sprayed and collected by the cotton collector, and cured and cut through the pendulum method, plus three-dimensional cotton paving, so as to form rock wool products of different specifications and uses.

Due to the fire caused by the improper selection of external wall insulation materials, it has caused great losses to the safety of people's lives and property, and rock wool products are the main energy-saving materials in the internationally recognized "fifth conventional energy" with their excellent fire and thermal insulation characteristics.

Rock wool and mineral wool are both fibrous thermal insulation products made of high-temperature melting and centrifugation, and their differences are:

1.The raw materials are different

Rock wool is made of natural ores such as basalt (or diabase) as the main raw material; Mineral wool is mainly used as raw material for industrial waste slag such as blast furnace slag;

2.Performance is different

The fiber mechanical properties, temperature resistance and chemical stability of rock wool are better than those of mineral wool.

3.The content of basic compounds is different

Mineral wool contains more alkaline compounds, and its volume stability and water resistance in a humid environment are worse than those of rock wool.

4.The acidity coefficient is different

The acidity coefficient of mineral wool is lower than that of rock wool, and it is worse than that of rock wool in terms of weather resistance and service life.

5.The operating temperature is different

The service temperature of mineral wool fiber is lower than that of rock wool, and it is worse than rock wool in terms of high temperature volume stability.

Rock mineral wool products can be applied to:

1.Application of rock mineral wool products in construction: used for thermal insulation and sound insulation of building walls and roofs, fire prevention and noise reduction of building partition walls, firewalls, various sandwich panels, fire doors and elevator shafts.

2.The industrial application of rock mineral wool products: thermal insulation, fire prevention, sound absorption and earthquake resistance of industrial equipment, pipelines, containers and various kilns.

3.Application of rock mineral wool products in shipbuilding industry: marine rock wool board is used for thermal insulation and fire insulation of ships and thermal insulation of power pipelines;

4.The application of rock mineral wool products in other fields: instead of alkali-resistant glass fiber weaving high-performance alkali-resistant mesh cloth, it is used for thermal insulation and fireproof occasions of vehicles, mobile equipment, cold storage projects, and air-conditioning pipelines. Manufacture of friction materials and sealing materials.

Rock wool originated in Hawaii. Rock wool products are made of high-quality basalt, dolomite, etc. as the main raw materials, after melting at a high temperature of more than 1450, the use of international advanced four-axis centrifuge high-speed centrifugal fiber, at the same time spray a certain amount of binder, dust-proof oil, water-repellent agent after the collection of cotton collector collection, through the pendulum method, plus three-dimensional cotton laying for solidification, cutting, the formation of different specifications and uses of rock wool products.

Mineral wool is a cotton-like staple fiber made from silicate melt, including slag wool, rock wool, glass wool and ceramic fiber, etc., which generally only refer to the first two in China.

From the above two concepts, it can be seen that the difference between rock wool and slag wool should be compared.

1.Different raw materials: metallurgical slag or fly ash as the main raw material is called slag cotton; Those who use basalt and other rocks as the main raw materials are called "rock wool".

2.There is also a certain difference in the acidity coefficient of rock wool and slag wool. The acidity coefficient mk of rock wool is generally greater than or even higher than that; The MK of slag wool can generally only be kept around and around, and it is difficult to exceed.

3.Due to the difference in chemical composition and acidity coefficient between rock wool and slag wool, there are certain differences in their properties.

1) Differences in water resistance.

2) Difference in heat resistance.

3) Differences in corrosion resistance.

The main thing is that the material is different. The main content of rock wool is basalt, and the content of mineral wool is only slag.

Mineral wool is made of molten metallurgical slag by injection or centrifugal method, which has the characteristics of heat insulation, sound absorption, corrosion resistance, non-combustibility, low price and waste utilization. It can be used loose or felt-like.

Rock wool melts natural rocks such as dolomite, granite, and basalt into rock wool by spraying or centrifugal method, and its performance is the same as that of slag wool.

Many people confuse the two concepts of rock wool and mineral wool, this is because rock wool and slag wool are collectively referred to as mineral wool, that is to say, rock wool must be mineral wool, but mineral wool is not necessarily rock wool, because when it comes to mineral wool, it may also be slag wool, which is the difference between mineral wool and rock wool. I hope the answer from "Uetersen" can help you!

Distinguish by acidity coefficient.

Generally, the filling on the inside of the mask is rock wool or mineral wool.

Rock wool and mineral wool are both mineral wools, which are inorganic fibrous products formed by melting natural rocks, (and) slag and other raw materials at high temperature under the joint action of centrifugal force and wind;

Its main chemical components are silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, and a small amount of iron oxide. To mold it, a small amount of phenolic resin is added;

Traditionally speaking, the products produced with slag as the main raw material are usually called mineral wool, and the products produced with natural rocks such as basalt or glimestone as the main raw materials are called rock wool;

From a professional point of view, the acidity coefficient is generally used as the main sign to distinguish rock wool from mineral wool, and the acidity coefficient refers to the ratio of the sum of the acid oxide content in the product to the sum of the alkaline oxide content, that is: acidity coefficient mk = (silicon dioxide + aluminum oxide) (calcium oxide + magnesium oxide).

Generally, products with an acidity coefficient greater than are called rock wool;

Generally speaking, due to the high acidity coefficient, rock wool is better than mineral wool in terms of chemical stability and high temperature resistance.

Rock wool is a mineral wool made from fused natural igneous rock.

Rock wool is a kind of mineral wool made of molten natural igneous rock, the main raw material is selected basalt or diabase, plus an appropriate amount of auxiliary materials, artificial inorganic fibers made by high-temperature melting centrifugal blowing, mainly including silica, calcium oxide and alumina and other chemical components.

Characteristics of rock wool

1. Rock wool is an efficient insulation material. The stone wool fibers are slender, with an average diameter of 6 m; It is basically equivalent to the thermal insulation performance of mainstream organic thermal insulation materials, and it is an efficient thermal insulation material.

2. Rock wool is a non-combustible fire-resistant insulation material. Rock wool is made of natural high-quality basalt (diabase) as the main raw material, the melting temperature of rock wool fiber is greater than 1000, the organic content is very low, it is a non-combustible Class A fireproof insulation material, with superior high temperature resistance and low thermal conductivity at high temperature.

3. Rock wool is an elastic vibration and sound absorbing material. Rock wool products are composed of a large number of slender fibers to form a porous connected micro air gap structure, which can convert sound energy into heat for sound absorption, which greatly reduces the reflection of sound waves, and is a cost-effective sound absorption, noise reduction and elastic vibration cancellation material.

4. Rock wool is a large-cycle product. The main raw material of rock wool is basalt, the rock with the most storage on the earth's surface, which is conducive to reducing dependence on petroleum energy; Rock wool has realized a large cycle of production and consumption, from the mining of raw materials, the production process to consumption, and finally to the reuse of waste building materials.

Rock wool is a man-made fiber made of selected basalt and diabase as the main raw materials, plus a certain number of auxiliary materials, and melted and blown at high temperature, which has the characteristics of non-combustible, non-toxic, light weight, low thermal conductivity, good sound absorption, good insulation, good chemical stability, and long service life, and is recognized as an ideal thermal insulation material at home and abroad. Its main types are rock wool board, rock wool felt, rock wool belt, rock wool tube shell, etc.

Asbestos is a generic name for natural fibrous siliceous minerals, which is a silicate mineral fiber widely used in building materials fireproof board, and is also the only natural mineral fiber, which has good tensile strength and good thermal insulation and corrosion resistance, and is not easy to burn, so it is widely used. There are many types of asbestos, the three most common are chrysotile (white asbestos), amosite (brown asbestos) and crocidotile (blue asbestos), among which chrysotile is the most abundant and widely used. Asbestos itself is not toxic, its biggest harm comes from its fibers, which is a very small, almost invisible fiber, when these small fibers are released, they can float in the air for a long time and be inhaled into the human body, and the inhaled asbestos fibers can accumulate in the human body for many years, attach and deposit in the lungs, causing lung diseases.

The difference between rock wool and asbestos, 1. The composition is different: (1) The composition of asbestos is a natural fibrous silicate mineral. (2) Rock wool products are mainly made of high-quality basalt and dolomite.

The main ingredients are silica, aluminum oxide, etc., of which silica content is the most. 2. Different carcinogenic conditions: (1) Asbestos fibers can cause diseases such as asbestosis and pleural mesothelioma, and many countries have chosen to completely ban the use of this dangerous substance.

On October 27, 2017, the World Health Organization's International Agency for Research on Cancer (IARC) published a preliminary list of carcinogens, and asbestos (various forms, including actinolite, amosite, anthophyllite, chrysotile asbestos, crocidolite, tremolite) is in the list of a class of carcinogens. (2) Rock wool has no carcinogenic risk. 3. Different uses:

1) Asbestos fiber can be woven into yarn, thread, rope, cloth, packing, etc., as a material or lining for transmission, heat preservation, heat insulation, insulation and other components, and is mainly used to make asbestos boards, asbestos paper fireproof boards, insulation pipes and kiln mats, as well as heat preservation, heat protection, insulation, sound insulation and other materials. (2) Rock wool can be made according to different uses: felt, strips, tubes, granules, plates, etc., which are applied to:

Nuclear power plants, power plants, chemical plants, large kiln insulation, building exterior wall insulation, roof and curtain wall insulation, isolation belts, cabins, shipboard sanitary units, crew lounges, power compartments, etc.