35results about How to "Large block" patented technology

The invention discloses a covering layer forming method of blind ore bodies with stable and massive roof surrounding rocks applying a bottom pillar-free subsection collapse method. The method can obviously reduce the work quantity of caving, has low caving cost and a little ore dilution, and improves the production efficiency and economic benefit of mines. The key points of the technical scheme are as follows: a first subsection mining tunnel is distributed in an ore body, and continuous gobs provided after the first subsection mining are used for inducing the roof rocks to collapse; and with the performing of the mining work, the areas of the gobs are expanded continuously, when the areas of the gobs reach the critical exposed area, the roof rocks at the gobs are unstable gradually and collapsed under the effects of stress and gravity so as to form a covering layer. When the first subsection mining tunnel distributes blast holes, the ore bodies among the access roads are required to be thoroughly collapse so as to cut off the support of the roof surrounding rocks completely and form continuous gobs with exposed area. The forming method is applicable to forming the covering layer of more stable and massive blind ore bodies of the roof surrounding rocks.

A number of DMA addresses are resolved to system memory addresses at a time to decrease latency time. The number of addresses resolved at a time is preferably correlated to the number of DMA addresses that can be stored in a single cache line. Additionally, system memory is allocated in larger blocks that can store all of the information from the DMA addresses in a cache line. No change is required to the operating system, which can continue to operate on the page size it is set for. All changes are made in the hardware mapping programs and in the device driver software.

The invention relates to a high-density calcined petroleum coke, the true specific gravity of the petroleum coke is 2.00 to 2.04 g/cm<3>, the apparent porosity is 32 to 36 percent and the particle size is 10 to 150mm; the sulfur content is 0.2 to 0.7 percent by weight, the ash content is 0.2 to 0.7 percent by weight, the content of volatile matters is 0.2 to 0.6 percent by weight, the water content is 0.4 to 3 percent by weight and the fixed carbon is 95 to 99.0 percent by weight. The production steps of a method for producing the high-density calcined petroleum coke are as follows: the water content of raw materials is controlled; the dry distillation is carried out on a stamp-charging coke oven; and the post-treatment of a product is carried out. The calcined petroleum coke which is produced by the coke oven can be randomly systematically adjusted according to the product quality of a user, thereby being capable of achieving the purposes of even quality, stability, reliability, high density and high strength.

The invention discloses an explosion method of dimension stone production in joint development rock, which comprises the following steps: determining the explosive loading direction, determining the explosive loading position, determining the hole net parameters, carrying out the explosion and the like. On one hand, the method disclosed by the invention controls the included angel between the propagation direction of explosion waves and the joint development surface by adjusting the axial angle between the working face and the blast hole to restrain the trend of the explosion crack; and on the other hand, the length of the explosion crack is adjusted by adjusting the opposite position of the explosive loading column and the joint development surface and combining or selecting the hole distribution mode of the blast hole in the middle of the joint development surface, in the position close to the joint development surface, at the position on the joint development surface and the like. The explosion method disclosed by the invention is specially used for exploding of the dimension stone production in the joint development rock, has the advantages of simple steps, strong operability and good explosion effects and can obtain a great quantity of dimension stone; and the dimension stone has the advantages of great dimension and uniform granularity and can meet the service requirements of various projects.

The present invention is method and device for making stone plate roasted meat. The device has two matched stone plate in the same size, including one upper cover plate and one lower roasting plate. The making process of stone plate roasted meat includes the following steps: heating the roasting plate inside some furnace to 200-300deg.c; smearing edible oil in the matched surface of the cover plate and spreading meat slices on the roasting plate and covering to stew for 2-5 min; turning the meat slices and covering to stew for 1-4 min; spreading salt on meat slices and covering to stew for 1-3 min, and turning the meat slices and covering to stew for 1-5 min; and spreading seasoning to both sides of meat slices and covering to stew for 0.5-2 min to make well roasted meat. The making process has no direct contact of meat to flame and homogeneous heating and is safe and sanitary, and the roasted meat is delicious.

The method of side loading coal in mechanical coke oven includes pressing mixed coal into briquette, packing single briquette with inflammable matter, stacking in large packing box of inflammable matter, covering with heat insulating hood, eliminating the heat insulating hood after loading in the oven, and closing the oven door for coking. The present invention presses the mixed coal into briquette to raise the bulk density of coal in the oven, raises the strength of coke and makes it possible to increase the mixed weakly viscous coal to low cost and lower the ash, sulfur, phosphorus and other harmful components in coke. Packing the briquette can avoid the direct contact between the briquette and high temperature inside the oven to avoid raw gas, smoke and dust and to increase lump size of coke. The said coal loading method has less investment, high efficiency, high coke strength, and other advantages.

The invention discloses coke with excellent thermal property and a preparation method. The coke with the excellent thermal property is formed by coking mixed coal, wherein the mixed coal is prepared from the following components in parts by weight: 45 to 55 parts of one-third coke, 10 to 20 parts of meager-lean coal, 15 to 25 parts of coking coal, 3 to 8 parts of blended coal and 10 to 15 parts offat coal. The coke with the excellent property, disclosed by the invention, has the beneficial effects of low reactivity and high strength after reaction.

The invention discloses coke and a preparation method thereof. The coke is made by coking of mixed coal; the mixed coal comprises, by weight, 65-75 parts of 1/3 coking coal, 5-10 parts of lean coal, 15-20 parts of coking coal, and 3-8 parts of meager lean coal. The coke and the preparation method thereof have the advantage that the coke has high crushing strength and wear resistance.

The invention discloses a heat exchange chamber of a coke oven. The heat exchange chamber of the coke oven comprises a chamber body, the interior of the chamber body is of a multi-layer structure, anair channel and a flue gas channel are arranged in each layer of the multi-layer structure in a penetrating mode, the layers of the multi-layer structure are sequentially communicated, the air channelis used for being communicated with the external environment, and the flue gas channel is used for being communicated with the external environment. And the flue gas channel is used for communicatingwith a vertical flame path of a combustion chamber in the coke oven. The invention also provides the coke oven adopting the heat exchange chamber. The heat exchange chamber is simple in structure, and the heat exchange efficiency of the coke oven can be effectively improved.

The invention relates to a magnesium-iron-calcium complexing compound flux for a puddling and sintering ore. The magnesium-iron-calcium complexing compound flux for the puddling and sintering ore is prepared from the components in percentage by mass: 0.25 percent to 0.75 percent of organic high-viscosity material, 11 percent to 13 percent of oxygenation sintering flux, and 86.25 percent to 88.75 percent of flux carrier. The organic high-viscosity material is a mixture of one or two of carboxymethylcellulose and a water soluble resin and is 0.25 percent to 0.75 percent by mass; the oxygenationsintering flux is iron oxide red (Fe2O3), has the granularity being less than or equal to 0.044mm, and is 11 percent to 13 percent by mass; and the flux carrier is a mixture of one or two of high-ironhigh-calcium refiring magnesium powder and calcite powder, and is 86.25 percent to 88.75 percent by mass. According to the magnesium-iron-calcium complexing compound flux for the puddling and sintering ore provided by the invention, more than 90 percent of sintering mixture is bonded and pelletized, so that the permeability of a sintered layer is improved, the height of the sintered layer is favorably increased, the solid fuel consumption is reduced, and low-temperature sintering is realized. The permeability of a sintered layer is improved, the sintering speed and the yield are improved, low-negative-pressure air-extracting and sintering can be adopted, the electric consumption is saved, and the energy is saved.

Foam is prepared from 12-17 parts of ethyl acetate, 16-41 parts of magnesium stearate, 16-18 parts of vinyl trimethoxy silane, 12-21 parts of choline, 12-19 parts of polyoxyethylene sorbitol monolaurate, 2-12 parts of magnesium stearate, 23-31 parts of kaolin, 23-25 parts of aluminum oxide, 3-6 parts of pearl powder, 12-19 parts of glycerinum, 3-9 parts of ammonium heptamolybdate, 1-4 parts of lactic acid, 42-56 parts of inorganic gel and 12-18 parts of organic bentonite. The plastic foam is large in monomer particle size, not prone to breakage, easier to use, large in lumpiness and convenient to use.