Advantages of silicon carbon manganese alloy ball: The traditional production process of manganese silicon alloy requires the use of rich manganese slag and low phosphorus, low iron, and rich manganese ore. The smelting process technology is mature, but currently, domestic manganese ore resources are difficult to meet the needs of high manganese and rich manganese slag. The production of Mll304 using manganese salt method is currently the research direction. To synthesize Mn304, the first step is to treat the oxidized manganese ore. There are currently two mature treatment processes before using silicon carbon manganese alloy balls. One is the reduction roasting method, which reduces MnO2 to Mn0 and then uses sulfuric acid leaching method. This method has high energy consumption and environmental pollution; Another method is wet method, in which the commonly used method is the so-called "two ore method", which involves mixing manganese ore with pyrite, leaching with sulfuric acid, reducing Mn02 using FeS in pyrite to generate MnS03, and then dissolving it in sulfuric acid. This method is difficult for solid-liquid separation, and it also introduces a large amount of harmful impurities such as S and As in pyrite, increasing the difficulty of purification. The production of manganese silicon alloy in a submerged arc furnace using the electric carbon thermal method is achieved by increasing the Si content to reduce the C content in the alloy. Due to the use of a submerged arc furnace, the production consumes high electricity, generates a large amount of waste gas, consumes a large amount of water, and has a high carbon content in the product. It is difficult to meet the requirements of producing low carbon manganese iron, low carbon high-strength steel with a carbon content less than 1.0% for manganese silicon alloy.





The refining furnace is a specialized furnace type for smelting medium to low carbon ferromanganese or medium to low carbon ferrochrome. The traditional electro silicothermic method is used to produce medium to low carbon ferromanganese or medium to low carbon ferrochrome using manganese silicon alloy or silicon chromium alloy in the refining electric furnace, and the process is very mature. In the past decade, due to the development of the "Bologn method" and hot melt refining technology, refining furnaces have been used to specifically melt manganese containing slag or chromium containing slag, and then the slag, manganese silicon alloy or silicon chromium alloy are inverted or shaken to produce medium and low carbon ferromanganese or medium and low carbon ferrochrome. The production process has also become mature, but due to the limitations of using raw materials, it is difficult to produce low-carbon ferromanganese and micro carbon ferrochrome. Silicon carbon manganese alloy ball is a method that can replace the use of artificial Mn304 to smelt low-carbon manganese silicon alloy in a refining electric furnace. It overcomes the high energy consumption and environmental pollution of traditional reduction roasting method for preparing Mn304; Wet solid-liquid separation is difficult, bringing in harmful impurities and increasing the difficulty of purification. The carbon content of the refined carbon manganese silicon alloy is only 0.27 0 3. It can meet the requirement that the carbon content is less than 0 4% requirement for low-carbon ferromanganese. Silicon carbon manganese alloy ball is a method of artificially replacing Mll304 to smelt low-carbon manganese silicon alloy in a refining electric furnace. The method includes the following steps: (1) Preparation of 1 111304 manganese oxide ore liquid phase reducing agent: sulfuric acid=1:0 1—0. 2:0. Mix manganese oxide ore and liquid phase reducing agent at a weight ratio of 5-0.6, leach with sulfuric acid, precipitate with alkali to remove iron, clean, and prepare Mn304. (2) The raw materials are prepared to process and crush the silicon iron into a particle size of 20mm. Quicklime containing Ca0 ^ 85 is crushed into a particle size of 8-50 Peng, and Mn304 is pelletized and dried. (3) Melting and refining: First, the Mll304 pellets are mixed evenly with one-third of the total amount of lime, and added in batches to the refining furnace for melting. After melting, the manganese content of the slag is about Mn40-45%, and the alkalinity is 0 8-1.0. When the furnace material is melted and the slag temperature is around 1500'C, silicon iron and remaining lime are added to the molten pool in stages and batches, and stirred. All the furnace materials are added, and the slag alkalinity is controlled between 1.0-1.2. After refining for 10-15 minutes, the silicon carbon manganese alloy ball reacts with Si and Mn0 in the furnace to achieve equilibrium. The slag surface in the furnace is calm, and iron tapping, slagging, and pouring can be carried out. Among them, the ratio of silicon carbon manganese alloy balls to the furnace charge for smelting low-carbon manganese silicon alloy is prepared according to the requirements for producing low-carbon manganese silicon alloy with Mn content. If low-carbon manganese silicon alloy with Mn content>8096 is to be smelted, the ratio is based on silicon iron:] ^ 11304 pellet lime=1:3 0—3. 5:1. 5-1.9 (weight ratio); When smelting low-carbon manganese silicon alloy containing Mn ^ 7296, the ratio should be silicon iron: Mn304 pellet lime=1:2 7-3:1:1.3-1.7 (weight ratio); When smelting low-carbon manganese silicon alloy containing Mn ^ 6596, the ratio is based on silicon iron] ^ 11304 pellet lime=1:2 4_ 2. 8:1. 1-1.5 (weight ratio). The liquid phase reducing agent is molasses and starch.



The silicon iron replaced by silicon carbon manganese alloy balls is one of 75% silicon iron, 65% silicon iron, and crystalline silicon. The prominent substantive feature and significant progress are that due to the use of artificial Mll304 and ferrosilicon, there are fewer impurities and the carbon content of ferrosilicon is low. The carbon content of the refined manganese silicon alloy is only 0.27 0.3, which can meet the requirements of low-carbon ferromanganese with a carbon content less than 0.4%. Low production cost and stable product quality.