What is KR desulfurizer and what is KR molten iron desulfurization method?

Mainly for the steel mill molten iron desulfurization, this product can not be used for steel desulfurization, with a small amount, good desulfurization effect and other characteristics, at present, China's Yanshan steel mill and Wuhan Iron and Steel are using this technology, the current largest production in the country is Xinxiang City Yuanfeng calcium industry production, with an annual output of 150,000 tons.

With the reduction of high-grade and low-impurity iron ores such as low phosphorus and low sulfur in the world, high-phosphorus and high-sulfur iron ores will inevitably enter the stage of mass use. In addition, the requirements for sulfur content of high-quality steel are becoming more and more stringent, so how to achieve effective desulfurization and produce high-quality low-sulfur steel has become one of the major issues faced by steel workers. The fast-acting KR desulfurizer produced by Gongyi Fuzhong Metallurgical Materials Factory has been widely used in many steel mills and has made a positive contribution to the desulfurization of molten iron.

1. Characteristics of fast-acting desulfurizer.

a. Instant melting: the melting point of the product is 1400, and it will melt when it enters the furnace.

b. Quick-effect: Due to the increase of desulfurization rate, the desulfurization time is shorter than that of conventional operation, which wins time for further deep desulfurization.

2. The physical and chemical indexes of the fast-acting KR desulfurizer (standards can be formulated according to user requirements): cao% caf2% sio2% moisture% particle size.

75 5～10 ≤8 ≤ 0-3mm

3. Addition amount and addition method.

1) Addition amount: 6-10kg tons of iron, increase or decrease according to the situation.

2) Operation steps:

Step 1 Entering the station slag scraping start stirring with desulfurizer stirring.

Requirements: Add 4-5kg with stirring for 10-15 minutes.

Step Sampling and analysis Slag scraping Add desulfurizer and stir again Slag scraping to fight.

It is required to 4-5kg or increase or decrease 10-15 minutes according to the situation Sampling and testing 3, and the subsequent heat will be adjusted according to the situation of the previous furnace The amount of addition, stirring time, sampling and analysis, and the number of slag scraping will be adjusted.

KR desulfurization is mechanical stirring desulfurization, which is a cross-shaped stirring paddle formed by pouring refractory materials, which is inserted into a quantitative amount of molten iron after baking and rotated, so that the molten iron produces a whirlpool, and then a quantitative desulfurizer is put into the molten iron vortex, so that the desulfurizer and the sulfur in the molten iron undergo desulfurization reaction in continuous stirring. The biggest advantage of this method is that the desulfurization kinetic conditions are good, so the desulfurization rate is very high (90%).

Over the past year, the KR stirring speed has been continuously increased to 100r min. At the same time, the service life of the stirring paddle has also increased from 80-110 times in 79 years to more than 500 times at present. The KR molten iron desulfurization equipment of Wuhan Jiate Heavy Equipment **** is mainly composed of the following main equipment:

1) Mixing equipment. It is composed of an impeller (stirring paddle), which plays the role of stirring molten iron during desulfurization. 2) Solvent receiving and adding equipment.

It consists of a receiving tank and a weighing funnel. The lime and desulfurizer are received into the receiving tank and discharged into the molten iron by their own weight through a weighing funnel. 3) Molten iron loading and transportation equipment.

It consists of a molten iron tank and a transport trolley with a tipping hot metal tank. 4) Temperature measurement and sampling device. It consists of a mechanical temperature measuring gun.

5) Dust removal device. Smoke hood and flue composition. Collect the flue gas during desulfurization and slag scraping.

6) Slag scraping device.

KR desulfurization is mechanical stirring desulfurization, which is a cross-shaped stirring paddle formed by pouring refractory materials, which is inserted into a quantitative amount of molten iron after baking and rotated, so that the molten iron produces a whirlpool, and then a quantitative desulfurizer is put into the molten iron vortex, so that the desulfurizer and the sulfur in the molten iron undergo desulfurization reaction in continuous stirring. The biggest advantages of this method are:

The desulfurization kinetic conditions are good.

Desulfurizer generally refers to the agent that removes free sulfur or sulfur compounds from fuel, raw materials or other materials; In the control and treatment of pollutants, it mainly refers to the chemicals used to remove sulfur oxides (including SO2 and SO3) in exhaust gases. Various basic compounds can be used as desulfurizers.

The abbreviation of Kanbara Reactor (the working principle of the KR method), the KR method was first developed by Japan in 1965, and the KR desulfurization device was introduced from Japan in the 70s of the 20th century. It is a cross-shaped stirring head that pours refractory materials and is baked, immersed in a certain depth of molten iron in the molten iron pool, and uses the vortex generated under the intense stirring action of a large stirrer to make calcium oxide or calcium carbide-based desulfurization powder fully contact and react with molten iron to achieve the purpose of desulfurization. Its advantages are superior kinetic conditions, less metal loss, conducive to the use of cheap desulfurizers such as CAO, desulfurization effect is relatively stable, high efficiency (desulfurization can be % desulfurizer consumption is less, suitable for low sulfur varieties of steel requirements high, large proportion of steel mills.

The disadvantage is that the equipment is complex, the one-time investment is large, and the temperature drop of desulfurization iron water is large.

The abbreviation of keyword rank KR (keyword optimization difficulty index), KR was invented by Xiao Jun, the author of Jinhua keyword tool, with a level of 0-10, and the larger the value, the greater the difficulty of optimization. The algorithm mainly uses the number of homepages of the results page and the number of keyword-related results, which is the most accurate keyword difficulty calculation method in the SEO industry.

HJ desulfurizer is mainly used in the production of ductile iron, cast steel, stainless steel, and raw molten iron desulfurization process.

The desulfurizer used in coal-fired power plants is the same as limestone powder + sprinkler water to absorb exhaust gases, mainly SO2 and other gases.

Limestone powder has a fine fineness of 325 mesh, and it is necessary to use an industrial mill (power plant desulfurization mill) to produce limestone powder.

The waste gas treatment of power plants is not to use limestone desulfurization, and the cost of limestone powder desulfurization is relatively low.