Production technology for drainage agent

[0037] Example one

[0038] A steel mill ladle drainage sand, the product formula contains 60 to 70 parts of chromium ore, 5 to 15 parts of alumina balls, 20 to 30 parts of desert sand and 1 to 5 parts of performance modifier. The performance modifier is Flake graphite, super carbon black and semi-reinforced carbon black are mixed in any proportion; among them, Cr in chrome ore 2 O 3 The content of ≥45%, the particle size is 0.2~0.9mm, and 80 mesh ≤ 3%, 20 mesh ≤ 2%, moisture ≤ 0.5%, calculated by weight percentage; SiO in desert sand 2 The content is ≥94%, and the particle size is 0.5~1.2mm.

[0039] Using the production process of the drainage agent of the present invention to produce the above drainage agent can be carried out as follows:

[0040] A. According to the particle size requirements of the raw materials in the product formula, sieving the chromium ore and desert sand to the corresponding particle size respectively, and measuring the composition of each raw material after sieving to ensure that the Cr in the chrome ore 2 O 3 The content of ≥45%, SiO in desert sand 2 The content of ≥94%, and then the raw materials that meet the requirements of the formula are transported to the drying site; B. The belt conveyor is used to transport to the drum kang, and the gas produced by the gas generator is burned in the hot blast stove to provide hot air for drying. During the drying and drying process, the rotating speed of the drum kang is controlled at 300 rpm, and the temperature of the induced air is controlled at 150 ℃, so that the moisture content of each raw material after drying is less than 0.1%. When drying different raw materials , The raw materials in the drum kang need to be cleaned before drying another raw material. Connect a cyclone separator at the outlet of the drum kang to separate and collect the dust generated during the drying process to achieve the effect of dust removal; C. Transport the dried raw materials to the air-cooled drum kang for air-cooling, so that the moisture mass percentage of each raw material after air cooling is less than 0.1% and the temperature is less than or equal to 200°C; D. After the cold, each raw material is sampled and inspected to ensure that the moisture content of each raw material is less than 0.1%; E. Each qualified raw material is transported to the designated silo through a conveyor device for storage, and labeled; F. According to the product formula According to the production tonnage of 2, 5, 8 or 10 tons each time, the microcomputer batching system calculates the quality of each raw material, and automatically controls the feeding and transport to the closed mixing tank to ensure the quality error of each production < 5kg; G. The carbonaceous material mixed with flake graphite, super carbon black and semi-reinforcing carbon black in any ratio is fed from a separate silo into a closed mixing tank, and the mixing time is controlled at 10 minutes to obtain the finished product, and the mixing tank is closed The outlet is connected with a cyclone separator for dust removal; H. Sampling inspection of the finished products to ensure that the moisture content of the finished product is less than 0.1%; I. Use a hoist to transport the inspected finished products to the high-position storage tank, ready for continuous Packaging; J. According to packaging requirements, control the measurement error of each bag <0.5kg/bag; K. Use an automatic packaging machine for packaging, the temperature in the packaging process is <60℃, and the mass percentage of moisture <0.1%; L. Finally Store the packaged finished products in storage.

[0041] Example two

[0042] A steel factory ladle drainage sand, the product formula is 60-76% of chromium sand, of which the Cr in the chromium sand 2 O 3 The mass percentage content of ≥45%; sea sand 10-20%, alumina ball 4-9%, desert sand 4-9%, potash feldspar 3-5%, carbon black 0.3-0.8%, flake graphite 0.3- 1.0%. The production process of the drainage agent of the present invention is used to produce the above-mentioned ladle drainage agent. The production steps are the same as those in the first embodiment. The difference is: step B, in the drying process, the drum kang speed is controlled at 450 rpm, and the air is induced The temperature is controlled at 200°C; in step G, carbon black and flake graphite are fed from a separate silo into a closed mixing tank, and the mixing time is controlled at 20 minutes to obtain a finished product.

[0043] Example three

[0044] The ladle drainage agent of a steel plant is made of the following raw materials: The mass distribution ratio is as follows: chromium sand 50-80%, white quartz sand 10-30%, fused magnesia 8-20%, and the particle size of each raw material is controlled within the required range Inside.

[0045] The production process of the ladle drainage agent of the present invention is used to produce the above-mentioned ladle drainage agent. The production steps are the same as those in the first embodiment. The difference is: step B, in the drying process, the drum kang speed is controlled at 300 rpm, The wind temperature is controlled at 150°C; in step G, the fused magnesia is fed from a separate silo into a closed mixing tank, and the mixing time is controlled at 30 minutes to obtain a finished product.