36results about How to "Good self-flow" patented technology

The invention provides a fettling material for a converter as well as preparation and using methods thereof. The fettling material is prepared from the following raw materials in parts by weight: 60 to 95 parts of magnesia, 10 to 20 parts of a binding agent, 2 to 5 parts of additives and 6 to 10 parts of wetting agents, wherein the binding agent is a mixture of asphalt and silica fume. Compared with the prior art, the fettling material for the converter has the beneficial effects that the fettling material for the converter as well as the preparation and using methods thereof disclosed by theinvention have good self-flow property, thermal-state strength, erosion resistance and thermal shock property; the hardening time of the fettling material is short, the maintenance time of furnace shutdown of the converter can be effectively reduced, the operation efficiency is improved, and the binding of the fettling material and a working lining of the converter is good so as to prevent stripping of the fettling material in a using process, and environmental pollution is reduced. The fettling material for the converter as well as the preparation and using methods of the fettling material disclosed by the invention have significant meanings on energy conservation and consumption reduction, environmental protection and increment of economic benefits.

The invention discloses a joint refractory material for heat exchange of the converter bottom and a preparation method and a construction method of the joint refractory material. The joint refractorymaterial is prepared from a first constituent part and a second constituent part, wherein the first constituent part comprises following components in percentage by weight: 63wt%-85wt% of magnesia, 0-10wt% of asphalt, 0-10wt% of graphite and 2wt%-17wt% of metal powder; the second constituent part is prepared from resin accounting for 5wt%-15wt% of weight of the first constituent part, alcohol substances accounting for 5wt%-15wt% of weight of the first constituent part and a curing agent accounting for 0.5wt%-1.5wt% of weight of the first constituent part. The joint refractory material can meetthe requirement of 1000-2000 furnaces of service life when the converter bottom is replaced in new furnace campaign and medium term of furnace campaign and guarantees normal and safe production of aconverter.

The invention relates to a pit patching material for a converter, wherein the pit patching material comprises the following raw materials by weight: 60-85 parts of the mixed powder of dolomite and sintered magnesia, 10-20 parts of modified asphalt, 2-5 parts of an additive, and 6-10 parts of a wetting agent, and a ratio of the dolomite to the sintered magnesia in the mixed powder is 1:(1-2). According to the present invention, the pit patching material has advantages of good self-flowing property, hot strength, corrosion resistance, thermal shock resistance and short hardening time so as to reduce the blowing-out maintenance time of the converter and improve the working efficiency; and the pit patching material and the converter working line are well adhered so as to prevent the pit patching material from peeling off during the use.

The invention relates to an environment-friendly water-based large fabric for converter fettling. The fabric comprises the following components in parts by weight: 80-90 parts of magnesia, 6-10 partsof binding agent, 0.5-1 part of slaked lime and 0.5-1 part of bentonite. The preparation method comprises the steps: adding water into the supplementary material, stirring to form porridge, pouring the stirred material into a position needing to be repaired in the converter, burning for 15-25 minutes at 800-1350 DEG C, and finishing the repair when the supplementary material is large and the surface material turns red. Compared with a common converter large-area fettling material, the sintering time is shortened by about 30 minutes; during sintering, no smoke, no odor and no harmful volatile matter exist, and no harm is caused to human bodies and the environment; and during sintering, gunning operation can be carried out so that the steelmaking efficiency is improved.

The invention discloses a repair material for a steel ladle and a preparation method thereof, and relates to the repair material for the steel ladle. The repair material for the steel ladle is prepared from the following components in percentage by mass: 75 to 90 percent of corundum and/or alumina particles and fine powder, 0 to 5 percent of activated alumina micro-powder, 2 to 9 percent of magnesia, 1 to 4 percent of sepiolite and 0 to 5 percent of an additive; the preparation method of the repair material for the steel ladle comprises the following steps: weighing and bagging the corundum and/or alumina fine powder, the activated alumina micro-powder, fine magnesia powder, the sepiolite, silicon micro-powder and the additive according to the requirement of a formula; checking the weight,and adding the components into a material mixing machine; after the materials are mixed, fixing single weight, and bagging the materials for later use; adding a fine powder homogenizing material andfibrous sepiolite into a mixing machine according to the requirement of the formula; adding magnesia and corundum particles less than or equal to 1 mm, stirring, and then adding the corundum or alumina particles of 3 to 1 mm and 5 to 3 mm, stirring and discharging a material, and sealing and packaging a finished product by using plastics. The repair material can be directly used without adding water and stirring, has high construction performance, and is used for repairing refractory materials, such as a steel ladle breathable pocket brick, a nozzle pocket brick and a steel ladle brick, in a thermal state.

The invention provides converter steel-tapping hole pumping and casting repair equipment and a casting repair method, and belongs to the technical fields of construction of fireresistant artesian casting material construction and equipment. The converter steel-tapping hole pumping and casting repair equipment is characterized in that a support frame is fixed to a delivery platform, wherein a material storing device is fixed to the support frame, and is connected with a feed opening of a pumping device through a conveying device, a discharge opening of the pumping device communicates with a heat insulating chute through a discharge pipe, and a material conveying device and the pumping device are both fixed to the delivery platform; and a high pressure gas source also communicates with the material conveying device through a high pressure gas pipe. Through hot-state artesian performance of a casting material, the casting material can be conveyed into a converter through a heat insulatingchute, and cast into tiny cracks between the periphery of casing pipe bricks and steel-tapping hole big bricks, and surplus heat of a backup lining brick is used for sintering. In the artesian process of the casting material, a liquid binder is added, wherein the casting machine is a magnesium artesian casting material, and main raw materials are sintered magnesia and fused magnesia. Efficient dispersing agents of explosion-proof fiber and polyocarboxy acid are added, and silicon dioxide micro powder, graphite or carbon black powder are compounded.

The invention relates to a sub-frame post-cast joint with an external permanent aluminum plate outer mold. The sub-frame post-cast joint mainly comprises a sub-frame column, steel bar connection sleeves, aluminum plate connectors, an external aluminum plate, a prefabricated grouting material opening, a steel screen and connecting bolts. The post-cast joint is arranged on the sub-frame column to separate the sub-frame column into two parts. The aluminum plate connectors are welded to the upper reinforcing steel bars and the lower reinforcing steel bars of the sub-frame column, and the upper reinforcing steel bars and the lower reinforcing steel bars are connected through the steel bar connection sleeves. The prefabricated grouting material opening is welded in one upper reinforcing steel bar of the sub-frame column. The external aluminum plate is fixedly connected with the aluminum plate connectors through the connecting bolts and self-fixed in an enclosed manner through anchoring screws. Grouting material fills the space formed by the external aluminum plate and the steel screen in an enclosed manner. A leveling concrete layer is arranged outside the external aluminum plate. The sub-frame post-cast joint has the advantages that a main structure and a sub-structure are completely disconnected first to allow the main frame to subside sufficiently and allow a sub-frame to be unstressed, and structure safety is guaranteed. The invention further provides a construction method of the sub-frame post-cast joint.

The invention discloses a membrane wall type front-rear arch for a large-sized coal-fired boiler, which comprises a plurality of boiler front-rear arch tube bundles; two adjacent tube bundles are fixedly connected through a steel plate; sides, close to the boiler furnace, of the tube bundles and the steel plates are covered with casting layers; a plurality of T-shaped dowels are arranged in the casting layers; the T-shaped dowels comprise nail heads and nail caps; the nail heads are fixedly connected onto the steel plates. The front-rear arch can prevent the casting layers from irregular fracturing and falling at a high temperature effectively, and can improve the thermal efficiency of the boiler.

The invention relates to a biomass particle fuel forming machine and belongs to the technical field of biomass energy forming equipment. The biomass particle fuel forming machine comprises a press roll 2 and a flat die 4. A pyramid type roll block 12 is formed on the surface of the press roll 2. The flat die 4 is provided with a die hole wedge feed area 13 and a shape keeping section 14. The biomass particle fuel forming machine has the advantages that the flat die can be used forwardly and reversely, service life of the flat is prolonged, the pyramid type roll block disposed on the surface of the press roll increases frictional force, extrusion feed is achieved effectively, production cost is lowered effectively, the biomass particle fuel forming machine is simple in structure, small in floor space, low in noise and dual-power, and the formed particles are high in hardness, smooth in surface, and good in self-flowability.

The invention belongs to the technical field of refractory materials, and in particular relates to a bismuth reverberatory retaining wall castable for smelting. The bismuth reverberatory retaining wall castable for smelting is prepared from the following raw materials in parts by weight: 50 to 60 parts of a first component and 40 to 50 parts of a second component, wherein the first component is prepared from the following raw materials in parts by weight: 34 to 42 parts of spinel, 15 to 23 parts of aluminum metal, 17 to 21 parts of silicon metal, and 38 to 40 parts of pink fused alumina; the second component is prepared from the following raw materials in parts by weight: 15 to 25 parts of a suspending agent and 75 to 85 parts of a binder. The bismuth reverberatory retaining wall castablefor smelting is resistant to high temperature and corrosion, long in service life, and environmentally friendly.

The invention provides a reinforcement grouting material which comprises the following raw materials in parts by mass: 500-600 parts of sulphate aluminum cement, 20-45 parts of mineral powder, 20-50 parts of silica fume, 50-80 parts of expanding agent, 250-350 parts of quartz sand, 4-6 parts of polycarboxylic acid early-strength type water reducer, 2-5 parts of tartaric acid, 0.5-2.5 parts of basalt fiber, 1-3 parts of defoaming agent and 0.5-2 parts of lithium carbonate.