After the Central Primary School, it says that the village prima

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2. We are all made of bones. We can control it freely. 40 is not much. Let's do it manually

3.

As long as we make up our mind to learn, we can learn every mole. If we want to discuss the difficulty and ease, we need to learn it according to our own actual preferences and original ecational background

1. binding is for the expression of animation services, inorganic and organic matter which involves deformation, fulcrum or skin, joints and other movement changes must be bound, will involve naming, constraints, dynamics, skin, brush weight and so on

2. rendering is for composite effect, which involves both the front, middle and back stages. Rendering is more related to material mapping, lighting settings, the use of renderers, layered synthesis, etc., which is the final part of the effect

3. cloth calculation is also achieved by setting parameters, equations, plug-ins, etc. required in Maya. It's just a small part of the special effects

   according to the working group, the company is generally divided into model group; The middle stage was animation group; The later stage is the rendering group; There are special effects group, binding group, TD group, etc

< / OL >

as long as you learn, it's not difficult. You are always good at thinking and operating

4. Generally, it is not so easy for others to tell you the real mineral processing technology. If you want to learn the real technology, either you pay others to give it to you, or you work in other people's mineral processing plants to steal the technology. I spent a year in a concentrator, and I knew a little bit of simple principles. The general process of mineral processing here is as follows:
1. After the ore is dried in the sun, the ilmenite is magnetized out by a magnetic separator to obtain titanium concentrate and zircon middlings
2. The middlings are discharged through the shaker and dried in the sun
3. The dried middlings are passed through the permanent magnet machine. After some inferior ferrotitanium and solitude are magnetized, rutile is separated by electric separation, and the rutile and zircon are separated
4. If the titanium proct contains high phosphorus, it usually needs flotation

the process is more complex and needs to be changed according to different minerals.

5. Generally speaking, Maya cloth is not accurate enough in solving cloth dynamics, and the collision distance with the object and the collision distance with itself are not enough. It can also increase the number of cloth solving steps. The default is once per frame, which can be changed to 0.2 or even smaller, so as to improve the accuracy, However, it will generate a lot of calculation and caching. If you are doing Maya cloth calculation for the first time, it is recommended that you read more tutorials to thoroughly understand the calculation method and the most important parameters of Maya cloth

6.

Australia and some African countries continue to explore and develop heavy mineral placers such as titanium and zirconium

The xolobeni project on the coast of eastern South Africa (Eastern Cape) has identified and estimated resources of 313 million tons, with a total heavy mineral grade of 5.4% and ilmenite grade of 2.9%. The deposit is about 200 km south of deban

The heavy mineral placer along the coast 100 km north of Dakar, Senegal, was explored by an American company from 1990 to 1993. It contains 723 million tons of resources and 2.66% of heavy minerals

The rutile placer mine in Sierra Leone started proction in 1979 and stopped proction in 1995 e to civil war. Now WGI heavy minerals is working. The proven and probable reserves of the deposit are 278 million tons and 1.43% of rutile can be recovered; In addition, 185 million tons of resources can be recovered and 1.2% of rutile can be recovered

Rio Tinto is promoting the development of heavy mineral Placer in southern Madagascar, with high-grade ilmenite reserves of 75 million tons (60% TiO < sub > 2 < / sub >), which is expected to be put into proction in the third quarter of 2008

the feasibility study on the heavy mineral placer of the so-called "corridor zone" along the coast of Mozambique was completed in 2002. The No.1 deposit has 2.7 billion tons of confirmed and inferred resources, which is composed of two blocks, one is 1.765 billion tons, and contains 4.14% ilmenite; The other is 908 million tons, containing 3.8% ilmenite. The proved and estimated reserves are 807 million tons, containing 4.65% ilmenite, 0.17% zircon and 0.02% rutile, which are deposited in ancient aeolian nes

There are 144 million tons of proven reserves in the poncarie project of bemax company in Murray basin, Australia, containing 3.2% of heavy minerals (53.09% of which are ilmenite, 16.75% of which are anatase, 9.72% of which are rutile and 9.40% of which are zircon); The estimated reserves are 57 million tons, containing 2.2% heavy minerals (69.85% ilmenite, 8.09% ilmenite, 1.10% rutile and 11.15% zircon). The ginkgo deposit has proved and estimated reserves of 186 million tons, containing 2.9% heavy minerals (46.1% ilmenite, 19.71% rutile, 12.1% zircon). The company recently discovered a heavy placer deposit in the central part of the basin (part of New South Wales), 9 km × The estimated resource is 110.6 million tons, containing 4.26% heavy minerals, 12% rutile, 62% ilmenite and 18% zircon. The Murray basin in southern Australia (across NSW, Victoria and South Australia) has a total of about 40 million tons of heavy mineral resources by the beginning of 2002. The large-scale ginkgo deposit (located in South Australia) has identified and inferred 205 million tons of resources, containing 3.2% of heavy minerals; Snapper (located in South Australia, 10km away from ginkgo, discovered in 2000) has 109 million tons of mineral resources and 4.8% of heavy minerals (rutile accounts for 9% - 21% and zircon 7% - 16%); The estimated resources of Gallipoli deposit are 461 million tons, containing 2% of heavy minerals; The estimated resources of yabbie deposit are 302 million tons, containing 1.9% heavy minerals; The estimated resource of shamrock deposit is 129 million tons, containing 2.3% heavy minerals; The estimated resources of crayfish deposit are 144 million tons, containing 1.5% heavy minerals; The laburnum deposit is estimated to have 70 million tons of resources and 2.9% of heavy minerals; Winchester deposit is estimated to have 103 million tons of resources and 4.1% of heavy minerals. Mindarie heavy mineral placer project in South Australia is drilled with 6702 holes and 103600 meters, with a total resource of 262 million tons, containing 2.33% heavy minerals, of which nearly 18% are rutile and perovskite, 49% are ilmenite, and more than 25% are zircon. In the Eucla basin of South Australia, the jacinth deposit discovered recently is estimated to have 108 million tons of resources, containing 6% of heavy minerals, 55% of which are zircon, 7% rutile and 22% ilmenite. Ambrosia deposit was discovered two kilometers north of it. It is estimated that the resource is 54 million tons, containing 3% heavy minerals, 55% zircon, 7% rutile and 14% ilmenite. In the Coburn project in Western Australia (in the south of Carnarvon), most of the resources are in the Amy zone, with an estimated resource of 250 million tons and a heavy mineral content of 1.4%; The estimated resource is 460 million tons, containing 1.4% heavy minerals. The resource of Dongara heavy mineral project, 35 km north of the important Eneabba heavy mineral deposit in Western Australia, has increased to 181.6 million tons, containing 5% of heavy minerals

7. There are two main beneficiation processes for ilmenite, i.e. "gravity separation high intensity magnetic separation flotation" and "gravity separation high intensity magnetic separation electric separation (sulfur removal before separation)". In the beneficiation process, the ilmenite should be selected strictly according to the particle size, and different technological processes should be adopted. The beneficiation process of ilmenite varies greatly according to different deposit types. In primary ilmenite, most ilmenite exists in the form of vanadium titanomagnetite. Most of the titanium in this kind of ore exists in the form of independent ilmenite. A small amount of ilmenite coexists with magnetite, which is difficult to separate. In addition, it contains other titanium minerals such as rutile. Generally speaking, the grade of primary ilmenite concentrate is difficult to exceed 48%, while the grade of ilmenite concentrate with more than 50% can be selected from placer type, especially from sea sand ilmenite weathered by pegmatite.

8. In the iron ore beneficiation process, it can be basically divided into mining, coarse crushing, fine crushing, coarse separation, grinding and cleaning. For different types of iron ore, it has different beneficiation characteristics. But basically, large mineral processing processes are similar. Taking magnetite beneficiation process, limonite beneficiation process and ilmenite beneficiation process as examples, the basic beneficiation processes are consistent.

9. 1、 Conventional flotation
the most commonly used collectors are oleic acid, oxidized paraffin soap, tar oil and some new collectors. One of the most commonly used is oleic acid and its soap. The application technology of this kind of collector is very mature and more reliable. However, it also has one of the most significant shortcomings, that is, the amount of material is too large. Oxidized paraffin soap is a kind of material obtained from the saponification of paraffin after oxidation. This collector has a wider source, and is more inexpensive. To some extent, it can replace oleic acid and its soap. However, the beneficiation efficiency of this collector is relatively poor, and the grade of the concentrate is not stable enough. Tar oil is the acidification proct of Tar Soap. Compared with oxidized paraffin soap, the ore grade selected by this collector is more stable. However, emulsification is also needed to ensure its collection effect before flotation. Compared with the above conventional collectors, the new collectors have better selectivity, generally do not need emulsification, and have better separation effect for some minerals which are difficult to separate. For example, in mineral processing, the floatability of ilmenite and augite is close, so it is difficult to separate them by flotation. After the use of some new collectors, they can be better separated and the ore grade can be greatly improved< Second, flocculation flotation can be subdivided into selective flocculation and hydrophobic flocculation. Among them, selective flocculation means that in the mixture composed of two or more minerals, a single mineral is agglomerated first and then separated step by step. Hydrophobic flocculation is a method of using the hydrophobic interaction between hydrophobic particles suspended in water to make them attract each other and coagulate into clusters, and then separate them. This method can improve the grade of raw ore from less than 10% to 40% to 50%, and greatly increase the efficiency of recycling, making it reach or even exceed 50%< The agglomerate flotation method is used for the agglomerate flotation of ilmenite, which means that the collector adsorbed on the surface of ilmenite makes the ilmenite hydrophobic, and then the particles are agglomerated by the capillary force of the bridge liquid, and the separation is carried out after it floats up. It should be noted that in the process of mineral processing by agglomeration flotation, the intensity and strength of stirring must be ensured at all times, so as to make the ore particles more easily agglomerate and achieve the effect of cleaning. When using agglomeration flotation to recover ilmenite, sodium oleate 3.5kg/t is recommended as collector and oxalic acid 1.5kg/t as inhibitor. After agglomeration flotation, the concentrate grade can reach more than 45%, and the recovery rate can reach or even exceed 75%. However, if the stirring intensity is not enough, the recovery rate may drop by 4% to 5% or even more. In addition, the impeller diameter and its position in the cell will also affect the flotation index. When the impeller diameter reaches about 50% of the stirred cell diameter and the impeller is about one meter away from the bottom of the cell, the agglomeration flotation method will have the best effect.

10. My suggestion is not to go to the confinement center, but to invite my sister-in-law to stay at home. If they put their children in another room in the confinement center, it's better to stay at home