Coke powder is a by-product produced by metallurgical calcium carbide and chemical manufacturing enterprises when coke is crushed, transported and used.
Due to the small size of the powder, it does not meet the requirements of production process and is sold cheaply in large quantities, or even directly discarded.
The current price of coke powder is only 1/3 of lump coke, and coke powder can only be used at low value.
The NPK compound fertilizer refers to a fertilizer variety that contains more than two elements in the three nutrient elements of nitrogen (N), phosphorus (P), and potassium (K) required by crops, or contains a variety of nutrient elements including medium or trace elements, and is mechanically mixed and manufactured. Products made from granulation, drying, screening, etc. According to its physical state, it can be divided into solid compound fertilizer and liquid compound fertilizer. Solid compound fertilizer is divided into powder, granulation (from dry granulation) and bulk blended compound fertilizer.
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From the current point of view, in the field of metallurgical industry production, in order to overcome the limitation of large demand and insufficient supply of resources, iron and steel enterprises have been investigating and studying how to realize the circulation of solid wastes so as to build a circular economy in the iron and steel industry.
Various types of dust and sludge are inevitably produced in the main process of metallurgical production. Waste from dry collection is called dust, and from wet collection is called sludge. Due to the shortage of mineral resources and the decline in grades, the output of sintering dust ash, blast furnace iron ash ash, converter and electric furnace steel smelting dust, steel rolling iron dust sludge, copper metallurgical precipitation sludge, etc. in the smelting production process has continued to increase.
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What is sponge iron
Sponge iron, also name as direct reduced iron (DRI), is the resulting product (with a metallization degree greater than 82 percent) of solid state reduction of iron ores or agglomerates (generally of high grade), the principal constituents of which are Metallic iron, residual iron oxides carbon’ and impurities such as phosphorus, sulphur and gangue (principally silica and alumina).
Biomass briquetting is to briquette and carbonize the scattered, light, difficult to store cellulose biomass, turn it to a kind of fuel. Biomass briquetting can increase capacity and calorific value of biomass, improve combustion performance, make the bio waste become a kind of commodity energy source. This conversion technology is increasingly accepted by people around the world now.
In the production process of metallurgical enterprises, converter oxygen blowing smelting is a necessary part of the steel making process.
During the converter blowing process, the oxygen injected into the pig iron undergoes an incomplete oxidation reaction with the carbon in the pig iron to form a flue gas containing CO. At the same time, iron and other accompanying metals enter the wet flue gas dedusting system in the form of flue gas as well. The soot carried by the washing sewage is precipitated and exists in the form of water-containing sludge. This is called the converter sludge.
Quick lime powder is a kind of powdery waste produced in the production of the lime kiln. The price of quick lime powder is very low, which is basically less than half of the price of lump quicklime. But in the production process of lime kiln, the production rate of quicklime powder is very high, many of the lime powder kilns have an ash content of more than 20%. The inefficient use of these lime powders will not only cause economic waste, but also cause pollution to the environment.
Coal briquette is a kind of coal product that has been briquetted under certain pressure with certain shapes and physicochemical properties from a coal briquette machine or an extruder machine.
It usually uses coal dust to mix with binder and sulfur-fixing agent as well as some other additives to get the briquette.
Industrial-fired boilers and industrial kilns use coal briquette to significantly increase thermal efficiency and reduce emissions of coal-fired pollutants compared to burning raw coal.
Coal briquetting with the cleaning process and the clean product is suitable for global development and worth encouraging.
By using a coal briquetting machine or a coke briquetting machine, these fine/dust can be easily turned to briquette. One thing in this briquetting process make things become easier, that is – binder.
The coal briquette and coke briquette binders have a dual function in the briquette making process.
1. it can infiltrate the coal particles, form a binder bridge to connect the particles, enhance the interaction between the coal/coke, and bond the particles together.
2. When carbonized, it can form a colloidal body, and the inert components are bonded together to form a high mechanical strength coal/coke briquette.