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

The invention relates to a large-area self-flow material for a water-based revolving furnace and a preparation method thereof. The large-area self-flow material comprises the following components in parts by weight: 60-88 parts of magnesium oxide MgO, 6-18 parts of silicon dioxide SiO2, 0.5-15 parts of calcium oxide CaO, 0-0.5 part of a retarding agent and 0.1-0.5 part of a water reducing agent, wherein a liquid bonding agent is increased by 5-6 parts by weight during stirring; and the flow value (self-flow) is 240-320 millimeters. The preparation method comprises the following steps of: adding sodium citrate, sodium tartrate, boric acid and the like into magnesite, forsterite, synthetic magnesium-calcium sand, dolomite and silicon fine powder serving as major raw materials, and premixing uniformly to form a scattered dry uniform aggregate; before use, adding 5-6 percent of liquid bonding agent; stirring into a fluid plastic state by using a forced stirrer; loading into a hopper for putting into a furnace; and rapidly shaking a furnace body till a material flows to positions required to be repaired naturally, wherein the sintering time is 15 minutes per 1-2 tons of materials.

The invention discloses a single-iron notch blast furnace main channel self-flow repairing material which comprises the following components by mass ratio: 40-50 parts of brown corundum or compact corundum, 18-25 parts of silicon carbide superfine powder, 12-15 parts of white corundum, 4-6 parts of alpha-Al2O3, 1-3 parts of silica micropowder, 1-2 parts of paraffin, 4.8-5.6 parts of ball pitch, 3-5 parts of silicon metal, 1-2 parts of ethylene glycol, 0.2-0.3 part of chromic oxide, 0.5-0.8 part of boron nitride, 0.2-0.3 part of zirconium oxide, 1.5-2.5 parts of compound additive and 0.3-0.5 part of composite explosion-proof agent. The single-iron notch blast furnace main channel self-flow repairing material is good in self-flow performance and high in permeability, can be used for greatlyimproving the repairing effect, and is very convenient in repairing operation; when the repairing material is used in a repairing technology, a construction tool is not needed in the operation, and the material is only needed to be placed at the corresponding position to be repaired without vibration; and the good self-flow function of the material can be used for repairing, so that the construction safety is improved, and the labor intensity of workers can be lightened.

The invention relates to a dry grouting material, which comprises the following components: 300-400 parts by weight of Portland cement, 5-10 parts by weight of aluminate cement, 500-600 parts by weight of quartz sand, CSA expansion The agent is 5-8 parts by weight, the lithium carbonate is 0.05-0.10 parts by weight, the calcium formate is 0.5-1.0 parts by weight, and the polycarboxylate superplasticizer is 1-2 parts by weight. The dry grouting material of the present invention is easy to operate, and only needs to be added with water and stirred evenly at the construction site. It has good fluidity, high strength, good early strength performance, and is non-corrosive to steel bars.

The invention provides a high-strength micro-expansive grouting material and its preparation method. Raw materials of the high-strength micro-expansive grouting material comprise Portland cement having a compressive strength of above 42.5MPa, sulphoaluminate cement or aluminous cement having a compressive strength of above 42.5MPa, a calcium sulphoaluminate expanding agent, quartz sand or corundum or iron tailings, an organic silicon antifoaming agent, a polycarboxylate superplasticizer, calcium formate or lithium carbonate, sodium gluconate, and methyl cellulose ether or hydroxypropyl methyl cellulose ether or hydroxyethyl methyl cellulose ether. Compared with present cement-based grouting materials treating the sulphoaluminate cement and the aluminous cement as main cementing materials, the high-strength micro-expansive grouting material, which is obtained through treating the Portland cement as a main cementing material component, carrying out ultrafine crushing of the cementing material component via an ultrafine crushing technology, and processing, has the characteristics of high early-stage strength, excellent fluidity, increased long-term strength, and good durability; and compared with traditional epoxy mortars, the high-strength micro-expansive grouting material has the characteristics of micro-expansion, simple and fast construction, non-toxicity, and harmlessness.

The invention provides a high-density high-strength alumina self-flow castable. The alumina self-flow castable with good fluidity, high density, high strength and high refractoriness is prepared from alumina raw material, alpha-Al2O3 micro powder, aluminate cement and other external additives by reasonably mixing the raw materials with different size fractions according to the theory of granularity, especially by optimizing the size fraction proportion and addition amounts of medium and small particles (less than or equal to 3mm) and substrate fine powder.

The invention provides a miniature steel pipe pile and a grouting reinforcement method. The miniature steel pipe pile comprises a steel pipe pile body; a pile tip sealing plate is connected to the lowermost end of the steel pipe pile body and provided with a grout discharge hole communicating with the inner side of the steel pipe pile body and a soil layer on the periphery of a pile tip; reinforcement treatment is conducted on a soil layer under the pile tip through two times of grouting; the characteristics of being good in automatic flow performance, quick in hardening, early in strengthening, free of shrinkage, slight in expansion and the like of grouting materials are utilized, the bearing capacity of a foundation can be improved quickly and effectively, and accordingly the bearing capacity of the pile tip is improved; and mixing of cement paste and the grouting materials is effectively prevented through a rubber plug in an inverted circular truncated cone shape, and the strength of the grouting materials at the pile tip is ensured.

The invention discloses a joint refractory material for heat replacement of the furnace bottom of a converter, a configuration method and a construction method thereof. Wherein, the joint refractory material is configured by a first component and a second component, and the first component by weight percentage is: magnesia 63-85wt%, asphalt 3-10wt%, graphite 4-10wt% %, metal powder 2-17wt%; the second component includes 5-15wt% resin, 5-15wt% alcohol and 0.5-1.5wt% curing agent based on the weight of the first component. The invention can meet the requirements of the life span of 1000-2000 furnaces when the bottom of the converter is replaced in the new furnace service or in the mid-term of the furnace service, and ensures the normal and safe production of the converter.

The invention relates to an Al2O3-SiO2-SiC-based refractory material, in particular to an Al2O3-SiO2-SiC-based jet material for wet jet construction of a foundry ladle. The Al2O3-SiO2-SiC-based jet material for the foundry ladle comprises the following components in percentage by weight: 45 to 65 percent of sintered mullite, 5 to 15 percent of SiC, 7 to 18 percent of brown aluminium oxide or special-grade alumina, 5 to 10 percent of Al2O3 super-micro powder, 4 to 8 percent of high-aluminum micro powder, 2 to 5 percent of silicon micro powder, 1.5 to 3 percent of calcium aluminate cement, and 6 percent of balance. The granularity of the Al2O3 super-micro powder is leas than or equal to 2 microns; the purity of Al2O3 in the high-aluminum micro powder is more than or equal to 88 percent, and the granularity is less than or equal to 5 microns; and the purity of SiO2 in the silicon micro powder is more than or equal to 92 percent, and the granularity is less than 1 micron. The balance comprises 3 percent of andalusite and 3 percent of cyanite. The jet material has high strength and good thermal shock stability and corrosion resistance, and ensures good self-flowing property and pumping property.

The invention discloses a rapidly-hardened blast furnace hearth repair material, which comprises a solid material, an admixture and a binding agent, wherein the solid material contains corundum particles and / or fine powder, silicon carbide particles and / or fine powder, a carbon additive and composite superfine powder, and the admixture includes a dispersant and a coagulation accelerator. The invention further discloses a preparation method of the rapidly-hardened blast furnace hearth repair material. The repair material belongs to a downgrade flow type and rapidly-hardened type, can be pumped and poured by clinging to a hearth carbon brick formwork, a pouring body and carbon bricks are closely attached, the construction is rapid and simple and convenient, the repair material is rapidly hardened, the construction period can be effectively shortened by 25%, the structure integrity of the repaired hearth is good, no brick joint exists, and the compactness is high.

The application relates to the technical field of concrete, and specifically discloses a high-throw steel pipe self-compacting concrete and a preparation process thereof. The high-throw steel pipe self-compacting concrete is mainly composed of the following raw materials by weight: 750-900 parts of coarse aggregate, 700-850 parts of fine aggregate, 350-450 parts of cement, 50-80 parts of fly ash, and 90- parts of slag powder 120 parts, 150-170 parts of water, 6-10 parts of water reducing agent, 35-45 parts of swelling agent, 20-35 parts of modifier; modifier includes N-2-(aminoethyl)-3-aminopropyl trimethoxysilane, and expansion agents include light-burned magnesium oxide. The high-throw steel pipe self-compacting concrete of the present application can be used for construction of high-rise buildings, bridges, etc., and has the advantages of good fluidity and few micro-cracks.